I'm trying to install MySQL in my computer but I keep getting this error all the time:
I uninstalled like 8 times already, any help would be very appreciated.
I searched about this in Google but any solution solve my problem.
The firewall is disabled and already have the exception for the port 3306, but still the error keeps coming :
EDIT:
I follow the advices and stills could not connect in my database:
Here's the select of the user in database, the password is the same for all of them as you can see:
And it looks I can ping but still getting the error in connection:
EDIT 2:
After create the users and try to connect using them :
C:\Documents and Settings\Administrator>mysql --user=root --password mysql
Enter password: *********
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 9
Server version: 5.5.22 MySQL Community Server (GPL)
Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> create user 'valter'#'localhost' identified by 'greyfox';
Query OK, 0 rows affected (0.01 sec)
mysql> grant all privileges on *.* 'valter'#'localhost' with grant option;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that
corresponds to your MySQL server version for the right syntax to use near ''val
er'#'localhost' with grant option' at line 1
mysql> grant all privileges on *.* to 'valter'#'localhost' with grant option;
Query OK, 0 rows affected (0.00 sec)
mysql> create user 'valter'#'%' identified by 'greyfox';
Query OK, 0 rows affected (0.01 sec)
mysql> grant all privileges on *.* to 'valter'#'%' with grant option;
Query OK, 0 rows affected (0.00 sec)
mysql> create user 'admin'#'localhost';
Query OK, 0 rows affected (0.00 sec)
mysql> grant reload process on *.* to 'admin'#'localhost';
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that
corresponds to your MySQL server version for the right syntax to use near 'proc
ss on *.* to 'admin'#'localhost'' at line 1
mysql> grant reload, process on *.* to 'admin'#'localhost';
Query OK, 0 rows affected (0.00 sec)
mysql> create user 'dummy'#'localhost';
Query OK, 0 rows affected (0.01 sec)
mysql> select User, Host from mysql.user;
+--------+-----------+
| User | Host |
+--------+-----------+
| valter | % |
| root | 127.0.0.1 |
| root | ::1 |
| | localhost |
| admin | localhost |
| dummy | localhost |
| root | localhost |
| valter | localhost |
+--------+-----------+
8 rows in set (0.00 sec)
mysql> exit
Bye
C:\Documents and Settings\Administrator>mysql -u root -p
Enter password: *********
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 10
Server version: 5.5.22 MySQL Community Server (GPL)
Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> select User, Host from mysql.user;
+--------+-----------+
| User | Host |
+--------+-----------+
| valter | % |
| root | 127.0.0.1 |
| root | ::1 |
| | localhost |
| admin | localhost |
| dummy | localhost |
| root | localhost |
| valter | localhost |
+--------+-----------+
8 rows in set (0.00 sec)
mysql>
And when I try to connect using the Heidi gives the same error:
EDIT 3:
Here it goes some queries I'm making to find out what is this error :
C:\Documents and Settings\Administrator>mysqladmin -u root -p version
Enter password: *********
mysqladmin Ver 8.42 Distrib 5.5.22, for Win32 on x86
Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Server version 5.5.22
Protocol version 10
Connection localhost via TCP/IP
TCP port 3306
Uptime: 7 hours 8 min 31 sec
Threads: 2 Questions: 43 Slow queries: 0 Opens: 39 Flush tables: 1 Open tab
les: 0 Queries per second avg: 0.001
C:\Documents and Settings\Administrator>
Another command:
C:\Documents and Settings\Administrator>mysqladmin -u root -p -h 'localhost' version variables;
Enter password: *********
mysqladmin: connect to server at ''localhost'' failed
error: 'Unknown MySQL server host ''localhost'' (0)'
Check that mysqld is running on 'localhost' and that the port is 3306.
You can check this by doing 'telnet 'localhost' 3306'
C:\Documents and Settings\Administrator>mysqladmin -h `localhost` --port=3306 ve
rsion
mysqladmin: connect to server at '`localhost`' failed
error: 'Unknown MySQL server host '`localhost`' (0)'
Check that mysqld is running on `localhost` and that the port is 3306.
You can check this by doing 'telnet `localhost` 3306'
And this is my.ini file:
# MySQL Server Instance Configuration File
# ----------------------------------------------------------------------
# Generated by the MySQL Server Instance Configuration Wizard
#
#
# Installation Instructions
# ----------------------------------------------------------------------
#
# On Linux you can copy this file to /etc/my.cnf to set global options,
# mysql-data-dir/my.cnf to set server-specific options
# (#localstatedir# for this installation) or to
# ~/.my.cnf to set user-specific options.
#
# On Windows you should keep this file in the installation directory
# of your server (e.g. C:\Program Files\MySQL\MySQL Server X.Y). To
# make sure the server reads the config file use the startup option
# "--defaults-file".
#
# To run run the server from the command line, execute this in a
# command line shell, e.g.
# mysqld --defaults-file="C:\Program Files\MySQL\MySQL Server X.Y\my.ini"
#
# To install the server as a Windows service manually, execute this in a
# command line shell, e.g.
# mysqld --install MySQLXY --defaults-file="C:\Program Files\MySQL\MySQL Server X.Y\my.ini"
#
# And then execute this in a command line shell to start the server, e.g.
# net start MySQLXY
#
#
# Guildlines for editing this file
# ----------------------------------------------------------------------
#
# In this file, you can use all long options that the program supports.
# If you want to know the options a program supports, start the program
# with the "--help" option.
#
# More detailed information about the individual options can also be
# found in the manual.
#
#
# CLIENT SECTION
# ----------------------------------------------------------------------
#
# The following options will be read by MySQL client applications.
# Note that only client applications shipped by MySQL are guaranteed
# to read this section. If you want your own MySQL client program to
# honor these values, you need to specify it as an option during the
# MySQL client library initialization.
#
[client]
port=3306
[mysql]
default-character-set=latin1
# SERVER SECTION
# ----------------------------------------------------------------------
#
# The following options will be read by the MySQL Server. Make sure that
# you have installed the server correctly (see above) so it reads this
# file.
#
[mysqld]
# The TCP/IP Port the MySQL Server will listen on
port=3306
#Path to installation directory. All paths are usually resolved relative to this.
basedir="C:/MySQL/MySQL Server 5.5/"
#Path to the database root
datadir="C:/Documents and Settings/All Users/Dados de aplicativos/MySQL/MySQL Server 5.5/Data/"
# The default character set that will be used when a new schema or table is
# created and no character set is defined
character-set-server=latin1
# The default storage engine that will be used when create new tables when
default-storage-engine=INNODB
# Set the SQL mode to strict
sql-mode="STRICT_TRANS_TABLES,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION"
# The maximum amount of concurrent sessions the MySQL server will
# allow. One of these connections will be reserved for a user with
# SUPER privileges to allow the administrator to login even if the
# connection limit has been reached.
max_connections=100
# Query cache is used to cache SELECT results and later return them
# without actual executing the same query once again. Having the query
# cache enabled may result in significant speed improvements, if your
# have a lot of identical queries and rarely changing tables. See the
# "Qcache_lowmem_prunes" status variable to check if the current value
# is high enough for your load.
# Note: In case your tables change very often or if your queries are
# textually different every time, the query cache may result in a
# slowdown instead of a performance improvement.
query_cache_size=0
# The number of open tables for all threads. Increasing this value
# increases the number of file descriptors that mysqld requires.
# Therefore you have to make sure to set the amount of open files
# allowed to at least 4096 in the variable "open-files-limit" in
# section [mysqld_safe]
table_cache=256
# Maximum size for internal (in-memory) temporary tables. If a table
# grows larger than this value, it is automatically converted to disk
# based table This limitation is for a single table. There can be many
# of them.
tmp_table_size=9M
# How many threads we should keep in a cache for reuse. When a client
# disconnects, the client's threads are put in the cache if there aren't
# more than thread_cache_size threads from before. This greatly reduces
# the amount of thread creations needed if you have a lot of new
# connections. (Normally this doesn't give a notable performance
# improvement if you have a good thread implementation.)
thread_cache_size=8
#*** MyISAM Specific options
# The maximum size of the temporary file MySQL is allowed to use while
# recreating the index (during REPAIR, ALTER TABLE or LOAD DATA INFILE.
# If the file-size would be bigger than this, the index will be created
# through the key cache (which is slower).
myisam_max_sort_file_size=100G
# If the temporary file used for fast index creation would be bigger
# than using the key cache by the amount specified here, then prefer the
# key cache method. This is mainly used to force long character keys in
# large tables to use the slower key cache method to create the index.
myisam_sort_buffer_size=17M
# Size of the Key Buffer, used to cache index blocks for MyISAM tables.
# Do not set it larger than 30% of your available memory, as some memory
# is also required by the OS to cache rows. Even if you're not using
# MyISAM tables, you should still set it to 8-64M as it will also be
# used for internal temporary disk tables.
key_buffer_size=10M
# Size of the buffer used for doing full table scans of MyISAM tables.
# Allocated per thread, if a full scan is needed.
read_buffer_size=64K
read_rnd_buffer_size=256K
# This buffer is allocated when MySQL needs to rebuild the index in
# REPAIR, OPTIMZE, ALTER table statements as well as in LOAD DATA INFILE
# into an empty table. It is allocated per thread so be careful with
# large settings.
sort_buffer_size=256K
#*** INNODB Specific options ***
# Use this option if you have a MySQL server with InnoDB support enabled
# but you do not plan to use it. This will save memory and disk space
# and speed up some things.
#skip-innodb
# Additional memory pool that is used by InnoDB to store metadata
# information. If InnoDB requires more memory for this purpose it will
# start to allocate it from the OS. As this is fast enough on most
# recent operating systems, you normally do not need to change this
# value. SHOW INNODB STATUS will display the current amount used.
innodb_additional_mem_pool_size=2M
# If set to 1, InnoDB will flush (fsync) the transaction logs to the
# disk at each commit, which offers full ACID behavior. If you are
# willing to compromise this safety, and you are running small
# transactions, you may set this to 0 or 2 to reduce disk I/O to the
# logs. Value 0 means that the log is only written to the log file and
# the log file flushed to disk approximately once per second. Value 2
# means the log is written to the log file at each commit, but the log
# file is only flushed to disk approximately once per second.
innodb_flush_log_at_trx_commit=1
# The size of the buffer InnoDB uses for buffering log data. As soon as
# it is full, InnoDB will have to flush it to disk. As it is flushed
# once per second anyway, it does not make sense to have it very large
# (even with long transactions).
innodb_log_buffer_size=1M
# InnoDB, unlike MyISAM, uses a buffer pool to cache both indexes and
# row data. The bigger you set this the less disk I/O is needed to
# access data in tables. On a dedicated database server you may set this
# parameter up to 80% of the machine physical memory size. Do not set it
# too large, though, because competition of the physical memory may
# cause paging in the operating system. Note that on 32bit systems you
# might be limited to 2-3.5G of user level memory per process, so do not
# set it too high.
innodb_buffer_pool_size=17M
# Size of each log file in a log group. You should set the combined size
# of log files to about 25%-100% of your buffer pool size to avoid
# unneeded buffer pool flush activity on log file overwrite. However,
# note that a larger logfile size will increase the time needed for the
# recovery process.
innodb_log_file_size=10M
# Number of threads allowed inside the InnoDB kernel. The optimal value
# depends highly on the application, hardware as well as the OS
# scheduler properties. A too high value may lead to thread thrashing.
innodb_thread_concurrency=8
My best guess is that you install MySQL with the default settings (provide more details if not). So check your firewall if the port for MySQL is open.
The default port is 3306. If that doesn't solve your problem, here is the MySQL Documentation on this error:
http://dev.mysql.com/doc/refman/5.5/en/can-not-connect-to-server.html
The installation looks like it's completing. The last step just does some finishing touches...
First, check to see if MySQL installed. Go to your Programs and Features section of the Control Panel. Scroll through (or use the search feature) to look for the MySQL Server 5.5 program.
If it's installed, make sure the service was added and started properly. Open the Services window by typing into the Run prompt services.msc. It lists all of your services. Depending on what the service was named (probably just MySQL), scroll through and look for it in that list. Make sure it says Started in the Status column.
If it's installed and the service is started, then you know the database installed properly. More than likely, it's just something in the installer that's causing it to break. (Which is good, means you're doing nothing wrong!)
To secure the installation, you can try manually running the included script. But, all it does it take the information you gave during the first steps of the installer and apply them.
According to the script's documentation, it sets the root password, removes root access privileges to anything but localhost, removes anonymous user accounts, and removes test databases. So, you can do that all yourself.
Related
Environment: Windows 7 64 bit. MySQL version 5.7.18.
I need to create a schema with name RQATAuto. It is created with name rqatauto.
I used these articles:
Mysql table name not working in uppercase ,
change table name to upper case , but neither helped.
What I tried.
1) I noticed I did not have a file my.cnf. It's location: C:\Program Files\MySQL\MySQL Server 5.7 I created it, and I put a line:
lower_case_table_names=2
When I start MySQL server, I get error.
C:\Program Files\MySQL\MySQL Server 5.7\bin>mysql -u root -p
mysql: [ERROR] unknown variable 'lower_case_table_names=2'
C:\Program Files\MySQL\MySQL Server 5.7\bin>
2) I tried to start MySQL server without my.cnf file.
mysql> SET lower_case_table_names=2;
ERROR 1238 (HY000): Variable 'lower_case_table_names' is a read only variable
mysql>
I also removed my.cnf and created a file my.ini
# The MySQL server [mysqld]
lower_case_table_names=2
C:\Program Files\MySQL\MySQL Server 5.7\bin>mysql -u root -p
mysql: [ERROR] Found option without preceding group in config file C:\Program Files\MySQL\MySQL Server 5.7\my.ini at line 2!
mysql: [ERROR] Fatal error in defaults handling. Program aborted!
3) I tried to use MySQL Workbench, it did not allow to use uppercase characters in schema name.
Update
I found file my.ini in C:\ProgramData\MySQL\MySQL Server 5.7 thanks to #Mihai. This is my file
# Other default tuning values
# MySQL Server Instance Configuration File
# ----------------------------------------------------------------------
# Generated by the MySQL Server Instance Configuration Wizard
#
#
# Installation Instructions
# ----------------------------------------------------------------------
#
# On Linux you can copy this file to /etc/my.cnf to set global options,
# mysql-data-dir/my.cnf to set server-specific options
# (#localstatedir# for this installation) or to
# ~/.my.cnf to set user-specific options.
#
# On Windows you should keep this file in the installation directory
# of your server (e.g. C:\Program Files\MySQL\MySQL Server X.Y). To
# make sure the server reads the config file use the startup option
# "--defaults-file".
#
# To run run the server from the command line, execute this in a
# command line shell, e.g.
# mysqld --defaults-file="C:\Program Files\MySQL\MySQL Server X.Y\my.ini"
#
# To install the server as a Windows service manually, execute this in a
# command line shell, e.g.
# mysqld --install MySQLXY --defaults-file="C:\Program Files\MySQL\MySQL Server X.Y\my.ini"
#
# And then execute this in a command line shell to start the server, e.g.
# net start MySQLXY
#
#
# Guildlines for editing this file
# ----------------------------------------------------------------------
#
# In this file, you can use all long options that the program supports.
# If you want to know the options a program supports, start the program
# with the "--help" option.
#
# More detailed information about the individual options can also be
# found in the manual.
#
# For advice on how to change settings please see
# http://dev.mysql.com/doc/refman/5.7/en/server-configuration-defaults.html
#
#
# CLIENT SECTION
# ----------------------------------------------------------------------
#
# The following options will be read by MySQL client applications.
# Note that only client applications shipped by MySQL are guaranteed
# to read this section. If you want your own MySQL client program to
# honor these values, you need to specify it as an option during the
# MySQL client library initialization.
#
[client]
# pipe
# socket=0.0
port=3306
[mysql]
no-beep
default-character-set=utf8
# SERVER SECTION
# ----------------------------------------------------------------------
#
# The following options will be read by the MySQL Server. Make sure that
# you have installed the server correctly (see above) so it reads this
# file.
#
# server_type=3
[mysqld]
lower_case_table_names=2
# The next three options are mutually exclusive to SERVER_PORT below.
# skip-networking
# enable-named-pipe
# shared-memory
# shared-memory-base-name=MYSQL
# The Pipe the MySQL Server will use
# socket=MYSQL
# The TCP/IP Port the MySQL Server will listen on
port=3306
# Path to installation directory. All paths are usually resolved relative to this.
# basedir="C:/Program Files/MySQL/MySQL Server 5.7/"
# Path to the database root
datadir=C:/ProgramData/MySQL/MySQL Server 5.7\Data
# The default character set that will be used when a new schema or table is
# created and no character set is defined
character-set-server=utf8
# The default storage engine that will be used when create new tables when
default-storage-engine=INNODB
# Set the SQL mode to strict
sql-mode="STRICT_TRANS_TABLES,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION"
# Enable Windows Authentication
# plugin-load=authentication_windows.dll
# General and Slow logging.
log-output=FILE
general-log=0
general_log_file="KHOYA01W7.log"
slow-query-log=1
slow_query_log_file="KHOYA01W7-slow.log"
long_query_time=10
# Binary Logging.
# log-bin
# Error Logging.
log-error="KHOYA01W7.err"
# Server Id.
server-id=1
# Secure File Priv.
secure-file-priv="C:/ProgramData/MySQL/MySQL Server 5.7/Uploads"
# The maximum amount of concurrent sessions the MySQL server will
# allow. One of these connections will be reserved for a user with
# SUPER privileges to allow the administrator to login even if the
# connection limit has been reached.
max_connections=151
# Query cache is used to cache SELECT results and later return them
# without actual executing the same query once again. Having the query
# cache enabled may result in significant speed improvements, if your
# have a lot of identical queries and rarely changing tables. See the
# "Qcache_lowmem_prunes" status variable to check if the current value
# is high enough for your load.
# Note: In case your tables change very often or if your queries are
# textually different every time, the query cache may result in a
# slowdown instead of a performance improvement.
query_cache_size=0
# The number of open tables for all threads. Increasing this value
# increases the number of file descriptors that mysqld requires.
# Therefore you have to make sure to set the amount of open files
# allowed to at least 4096 in the variable "open-files-limit" in
# section [mysqld_safe]
table_open_cache=2000
# Maximum size for internal (in-memory) temporary tables. If a table
# grows larger than this value, it is automatically converted to disk
# based table This limitation is for a single table. There can be many
# of them.
tmp_table_size=190M
# How many threads we should keep in a cache for reuse. When a client
# disconnects, the client's threads are put in the cache if there aren't
# more than thread_cache_size threads from before. This greatly reduces
# the amount of thread creations needed if you have a lot of new
# connections. (Normally this doesn't give a notable performance
# improvement if you have a good thread implementation.)
thread_cache_size=10
#*** MyISAM Specific options
# The maximum size of the temporary file MySQL is allowed to use while
# recreating the index (during REPAIR, ALTER TABLE or LOAD DATA INFILE.
# If the file-size would be bigger than this, the index will be created
# through the key cache (which is slower).
myisam_max_sort_file_size=100G
# If the temporary file used for fast index creation would be bigger
# than using the key cache by the amount specified here, then prefer the
# key cache method. This is mainly used to force long character keys in
# large tables to use the slower key cache method to create the index.
myisam_sort_buffer_size=370M
# Size of the Key Buffer, used to cache index blocks for MyISAM tables.
# Do not set it larger than 30% of your available memory, as some memory
# is also required by the OS to cache rows. Even if you're not using
# MyISAM tables, you should still set it to 8-64M as it will also be
# used for internal temporary disk tables.
key_buffer_size=8M
# Size of the buffer used for doing full table scans of MyISAM tables.
# Allocated per thread, if a full scan is needed.
read_buffer_size=64K
read_rnd_buffer_size=256K
#*** INNODB Specific options ***
# innodb_data_home_dir=0.0
# Use this option if you have a MySQL server with InnoDB support enabled
# but you do not plan to use it. This will save memory and disk space
# and speed up some things.
# skip-innodb
# If set to 1, InnoDB will flush (fsync) the transaction logs to the
# disk at each commit, which offers full ACID behavior. If you are
# willing to compromise this safety, and you are running small
# transactions, you may set this to 0 or 2 to reduce disk I/O to the
# logs. Value 0 means that the log is only written to the log file and
# the log file flushed to disk approximately once per second. Value 2
# means the log is written to the log file at each commit, but the log
# file is only flushed to disk approximately once per second.
innodb_flush_log_at_trx_commit=1
# The size of the buffer InnoDB uses for buffering log data. As soon as
# it is full, InnoDB will have to flush it to disk. As it is flushed
# once per second anyway, it does not make sense to have it very large
# (even with long transactions).
innodb_log_buffer_size=1M
# InnoDB, unlike MyISAM, uses a buffer pool to cache both indexes and
# row data. The bigger you set this the less disk I/O is needed to
# access data in tables. On a dedicated database server you may set this
# parameter up to 80% of the machine physical memory size. Do not set it
# too large, though, because competition of the physical memory may
# cause paging in the operating system. Note that on 32bit systems you
# might be limited to 2-3.5G of user level memory per process, so do not
# set it too high.
innodb_buffer_pool_size=8M
# Size of each log file in a log group. You should set the combined size
# of log files to about 25%-100% of your buffer pool size to avoid
# unneeded buffer pool flush activity on log file overwrite. However,
# note that a larger logfile size will increase the time needed for the
# recovery process.
innodb_log_file_size=48M
# Number of threads allowed inside the InnoDB kernel. The optimal value
# depends highly on the application, hardware as well as the OS
# scheduler properties. A too high value may lead to thread thrashing.
innodb_thread_concurrency=17
# The increment size (in MB) for extending the size of an auto-extend InnoDB system tablespace file when it becomes full.
innodb_autoextend_increment=64
# The number of regions that the InnoDB buffer pool is divided into.
# For systems with buffer pools in the multi-gigabyte range, dividing the buffer pool into separate instances can improve concurrency,
# by reducing contention as different threads read and write to cached pages.
innodb_buffer_pool_instances=8
# Determines the number of threads that can enter InnoDB concurrently.
innodb_concurrency_tickets=5000
# Specifies how long in milliseconds (ms) a block inserted into the old sublist must stay there after its first access before
# it can be moved to the new sublist.
innodb_old_blocks_time=1000
# It specifies the maximum number of .ibd files that MySQL can keep open at one time. The minimum value is 10.
innodb_open_files=300
# When this variable is enabled, InnoDB updates statistics during metadata statements.
innodb_stats_on_metadata=0
# When innodb_file_per_table is enabled (the default in 5.6.6 and higher), InnoDB stores the data and indexes for each newly created table
# in a separate .ibd file, rather than in the system tablespace.
innodb_file_per_table=1
# Use the following list of values: 0 for crc32, 1 for strict_crc32, 2 for innodb, 3 for strict_innodb, 4 for none, 5 for strict_none.
innodb_checksum_algorithm=0
# The number of outstanding connection requests MySQL can have.
# This option is useful when the main MySQL thread gets many connection requests in a very short time.
# It then takes some time (although very little) for the main thread to check the connection and start a new thread.
# The back_log value indicates how many requests can be stacked during this short time before MySQL momentarily
# stops answering new requests.
# You need to increase this only if you expect a large number of connections in a short period of time.
back_log=80
# If this is set to a nonzero value, all tables are closed every flush_time seconds to free up resources and
# synchronize unflushed data to disk.
# This option is best used only on systems with minimal resources.
flush_time=0
# The minimum size of the buffer that is used for plain index scans, range index scans, and joins that do not use
# indexes and thus perform full table scans.
join_buffer_size=256K
# The maximum size of one packet or any generated or intermediate string, or any parameter sent by the
# mysql_stmt_send_long_data() C API function.
max_allowed_packet=4M
# If more than this many successive connection requests from a host are interrupted without a successful connection,
# the server blocks that host from performing further connections.
max_connect_errors=100
# Changes the number of file descriptors available to mysqld.
# You should try increasing the value of this option if mysqld gives you the error "Too many open files".
open_files_limit=4161
# Set the query cache type. 0 for OFF, 1 for ON and 2 for DEMAND.
query_cache_type=0
# If you see many sort_merge_passes per second in SHOW GLOBAL STATUS output, you can consider increasing the
# sort_buffer_size value to speed up ORDER BY or GROUP BY operations that cannot be improved with query optimization
# or improved indexing.
sort_buffer_size=256K
# The number of table definitions (from .frm files) that can be stored in the definition cache.
# If you use a large number of tables, you can create a large table definition cache to speed up opening of tables.
# The table definition cache takes less space and does not use file descriptors, unlike the normal table cache.
# The minimum and default values are both 400.
table_definition_cache=1400
# Specify the maximum size of a row-based binary log event, in bytes.
# Rows are grouped into events smaller than this size if possible. The value should be a multiple of 256.
binlog_row_event_max_size=8K
# If the value of this variable is greater than 0, a replication slave synchronizes its master.info file to disk.
# (using fdatasync()) after every sync_master_info events.
sync_master_info=10000
# If the value of this variable is greater than 0, the MySQL server synchronizes its relay log to disk.
# (using fdatasync()) after every sync_relay_log writes to the relay log.
sync_relay_log=10000
# If the value of this variable is greater than 0, a replication slave synchronizes its relay-log.info file to disk.
# (using fdatasync()) after every sync_relay_log_info transactions.
sync_relay_log_info=10000
# Indicates how is the InnoDB Cluster configured as (Classic, Sandbox, Master or Slave).
# innodbclustertypeselection=ClassicMySQLReplication
# Indicates how is the InnoDB Cluster is/will be named.
# innodbclustername="sandboxCluster"
# Indicates how many instances will the InnoDB cluster sandbox will have.
# innodbclusterinstances=0
# Holds the InnoDB Cluster Username.
# innodbclusterusername
# Indicates the InnoDB Cluster URI.
# innodbclusteruri
# Indicates the InnoDB Cluster Port.
# innodbclusterport=3306
# Load mysql plugins at start."plugin_x ; plugin_y".
# plugin_load
# MySQL server's plugin configuration.
# loose_mysqlx_port=33060
You can find in this file (after I updated it!)
[mysqld]
lower_case_table_names=2
Then I tried (after restarting the server!)
mysql> create database AbcDeF;
Query OK, 1 row affected (0.02 sec)
mysql> show databases
-> ;
+--------------------+
| Database |
+--------------------+
| information_schema |
| abcdef |
| mysql |
| performance_schema |
| rqatautomationdb |
| sys |
+--------------------+
6 rows in set (0.00 sec)
mysql>
After playing around, I got this
The server option 'lower_case_table_names' is configured to use case sensitive table names but the data directory is on a case-insensitive file system which is an unsupported combination
I found this
https://bugs.mysql.com/bug.php?id=75185
I think it is not allowed to have case sensitive schema and table names on a case insensitive file system (NTFS).
Put it like this in your my.ini
[mysqld]
lower_case_table_names=2
Lines beginning with a # are a comment.
You can have several segments in the file. Under [mysqld] are options for the server, under [mysql] are options for the client, like the prompt for example.
Here comes solution thanks to my collegue!
Use quotes `SchemaName` to create a schema name!
mysql> create database `Adatabase_name`;
Query OK, 1 row affected (0.00 sec)
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| Adatabase_name |
| mysql |
| performance_schema |
| sys |
+--------------------+
10 rows in set (0.00 sec)
mysql>
Take a look at Adatabase_name.
Note, I have lower_case_table_names=2 in my.ini file. This is useful to find my.ini file.
I can not find my.cnf on my windows computer
I am trying to enable slow_query_log on mysql, but I could not find it on my mac.
I read in MySQL 5.7 Documentation that"
By default, the server writes files for all enabled logs in the data directory.
When I write show variables like '%slow_query%'; in mysql shell, I see the following:
but I can't see McBook-Pro-6-slow.log in the data directory. Here is all I can see in the data directory:
Could someone let me know why I can't see the slow log file?
In order to enable the slow_query_log, I've read here that I should add slow-query-log=1 to my.cnf. Here, my problem is that I am not sure where is mysql config file on my Mac. I've found a my-default.cnf in usr/local/mysql/support-files/ and another my.cnf file in /etc. Which one should I modify??
Thanks,
Refer to this Stackoverflow question MySQL 'my.cnf' location? which pertains to Mac OS. As you can see the permutations of locations are numerous usually compounded by different distros and MAMP XAMP WAMP bundles and Home Brew. It is not uncommon to have 2 mysql daemons on a box and not even know it.
Which is why in comments I suggested looking at the output of select ##basedir for the location of the my.ini (Windows) or my.cnf (Linux/Mac). That is not to suggest a configuration file is going to be there, but that is where it should be if one were to exist. Without it, baked-in default values are used. Often there is a stub, a suggested file, named differently (like my-default), awaiting your tweaks and a rename or copy to the appropriate file name of my.ini or my.cnf.
There is also a system variable named slow_query_log_file and its value visible if set thru SELECT ##slow_query_log_file;. For me right now it has a value of GUYSMILEY-slow.log because I did not set it in my ini (Windows) and it defaults to computername+"-slow.log".
That is the filename without the path. Where the file actually is written to is in the datadir seen with the output of select ##datadir;.
On my system this means (via ##basedir)
C:\Program Files\MySQL\MySQL Server 5.6\my.ini
would have a setting that ends up in a slowlog file written to in this absolute path (helped by ##datadir):
C:\ProgramData\MySQL\MySQL Server 5.6\data\GUYSMILEY-slow.log
and a fragment inside that log file might show something like this:
Ini and cnf changes require a MySQL daemon restart. In that configuration file a section similar to (my 5.6)
[mysqld]
basedir=C:\\Program Files\\MySQL\\MySQL Server 5.6\\
datadir=C:\\ProgramData\\MySQL\\MySQL Server 5.6\\Data\\
port=3306
log_warnings = 2
and (my 5.7)
[mysqld]
basedir=C:\\Program Files\\MySQL\\MySQL Server 5.7\\
datadir=C:\\ProgramData\\MySQL\\MySQL Server 5.7\\Data\\
port=3307
log_error_verbosity=2
the above is used within the [mysqld] section to play with settings. What I suggest is playing with this section with an innocuous setting like log_error_verbosity (5.7.2 and up) or similar, save it. Restart the deamon and determine if the variable (as Rick James would call settings because most really aren't dynamically settable). So a sanity check of select ##log_error_verbosity (5.7.2 and up) can confirm it the change is picked up. If it is, bingo, you are doing it right.
The Manual Page Server System Variables depicts the variables (settings) and whether or not they can be dynamically set/changed after the config file load via commands. Dynamic changes are reverted upon daemon restart.
How one would dynamically change a variable might look like:
SET GLOBAL log_error_verbosity=2;
Again, only certain variables are available in certain MySQL versions, such as the above, not available in older versions.
Also note multiple versions of MySQL running concurrently on a server. On mine i have 5.6.31 and 5.7.14. To access a different one via command line tools, use something like the -P 3307 switch to point at the one running on port 3307. Note the uppercase P as opposed to lowercase (which would mean prompt for password).
Determine if multiple instances are running. I use port checks such as
sudo netstat -tulpn (Linux)
netstat -aon | more (Windows, the top part, State=LISTENING)
Unfortunately these types of changes and trial and error take time and are very frustrating. Sorry I do not have a quick and easy answer for all cases.
Addendum
Notes here related to comments. In the below, w-x-y-z is a redacted IP Address.
On a Linux box (amazon ec2 redhat btw):
select ##slow_query_log;
-- 0 (so it is turned off)
SELECT ##slow_query_log_file;
-- /var/lib/mysql/ip-w-x-y-z-slow.log
select ##version;
-- 5.7.14
set global slow_query_log=1;
Error Code: 1227. Access denied; you need (at least one of) the SUPER privilege(s) for this operation 0.094 sec
(ok I was in MySQL Workbench as a dummied down user, off to do it as root via MySQL cmd line ...
mysql> set global slow_query_log=1;
Query OK, 0 rows affected (0.01 sec)
mysql> select ##slow_query_log;
+------------------+
| ##slow_query_log |
+------------------+
| 1 |
+------------------+
1 row in set (0.00 sec)
btw Workbench user can confirm the above `1`
at shell as linux user:
[ec2-user#ip-w-x-y-z ~]$ cd /var/lib/mysql
[ec2-user#ip-w-x-y-z mysql]$ sudo ls -la
(there were many files, only one needed to show you below)
-rw-r-----. 1 mysql mysql 179 Sep 19 01:47 ip-w-x-y-z-slow.log
[ec2-user#ip-w-x-y-z mysql]$ sudo vi ip-w-x-y-z-slow.log
(Header stub, the entire contents, no slow queries yet, log seen below):
/usr/sbin/mysqld, Version: 5.7.14 (MySQL Community Server (GPL)). started with:
Tcp port: 3306 Unix socket: /var/lib/mysql/mysql.sock
Time Id Command Argument
SHOW VARIABLES LIKE 'log_output'; to verify that it is set to FILE or FILE,TABLE.
I just installed MySQL 5.7 on Windows 10. I am intending to run bugzilla on this computer, so I'd like the settings from this bugzilla mysql settings page, which are
max_allowed_packet=16M
ft_min_word_len=2
When I run mysql --help from cmd, I get a line that says
Default options are read from the following files in the given order:
C:\WINDOWS\my.ini C:\WINDOWS\my.cnf C:\my.ini C:\my.cnf C:\Program Files\MySQL\MySQL Server 5.7\my.ini C:\Program Files\MySQL\MySQL Server 5.7\my.cnf
None of those files exist until C:\Program Files\MySQL\MySQL Server 5.7\my.ini, which is where I added the settings from above. HOWEVER, if I open mysql -u username -p from the same window, I get
mysql> SHOW VARIABLES LIKE 'max_allowed_packet';
+--------------------+---------+
| Variable_name | Value |
+--------------------+---------+
| max_allowed_packet | 4194304 |
+--------------------+---------+
1 row in set (0.00 sec)
mysql> SHOW VARIABLES LIKE 'ft_min_word_len';
+-----------------+-------+
| Variable_name | Value |
+-----------------+-------+
| ft_min_word_len | 4 |
+-----------------+-------+
1 row in set (0.00 sec)
And if I do mysql --help again, I get a line that says
max-allowed-packet 16777216
So I'm really confused. Am I logging into different mysql installs or something? Current full mysql --help here.
Find the spot where your my.ini is first picked up. A typical spot will be in the basedir visible with
select ##basedir;
Do the same for ##datadir and write those values down in case you make changes and want to undo what you have done. Such as messing it up and your data is not pointed to upon startup. You log file will tell you if it is broken.
Note too my comments above about specifying the port number with command line tools with a -P (uppercase).
For the my.ini you will need to Open as Administrator to make changes there anyway. Then perform a server restart. (mysqladmin).
Depending on your actual mysql version, attempt to modify, say, the verbosity level. And continue until you isolate where the file you want is picked up for your variables you wish to load on startup. Note in my below it suggests I have two servers running. Which I do on ports 3306 and 3307 for 5.6 and 5.7.13, respectively.
[mysqld]
basedir=C:\\Program Files\\MySQL\\MySQL Server 5.7\\
datadir=C:\\ProgramData\\MySQL\\MySQL Server 5.7\\Data\\
port=3307
log_error_verbosity=2
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES,NO_AUTO_CREATE_USER
When you first setup the server on Windows, it is highly likely that you don't even have a my.ini that is active. There is a default stub not Live. And the values are merely baked in. It took me a while to realize there was truly no file loading anything until I found the spot.
i've looked up every tutorial on how to fix this and nothing worked so far,
I'm getting this error
No connection could be made because the target machine actively refused it
i'm using linux centos7 mysql version
mysql Ver 14.14 Distrib 5.6.32, for Linux (x86_64) using EditLine wrapper
blow is my.cnf
also i had to create my own my.cnf as when i installed mysql it didn't have one located i put this into etc/my.cnf it's running the cnf as it's taken mysql out of strict mode.
# For advice on how to change settings please see
# http://dev.mysql.com/doc/refman/5.6/en/server-configuration-defaults.html
# *** DO NOT EDIT THIS FILE. It's a template which will be copied to the
# *** default location during install, and will be replaced if you
# *** upgrade to a newer version of MySQL.
[mysqld]
# Remove leading # and set to the amount of RAM for the most important data
# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.
# innodb_buffer_pool_size = 128M
# Remove leading # to turn on a very important data integrity option: logging
# changes to the binary log between backups.
# log_bin
# These are commonly set, remove the # and set as required.
# basedir = .....
# datadir = .....
# port = .....
# server_id = .....
# socket = .....
bind-address = 0.0.0.0
#skip-networking
# Remove leading # to set options mainly useful for reporting servers.
# The server defaults are faster for transactions and fast SELECTs.
# Adjust sizes as needed, experiment to find the optimal values.
# join_buffer_size = 128M
# sort_buffer_size = 2M
# read_rnd_buffer_size = 2M
sql_mode=NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION
Ok, I am assuming that you have installed this on a completely different machine (as opposed to a Virtual Host on your Windows box).
You need to make sure that port 3306 is open on your DB server first and foremost. You can check this with a port checker (there are plenty of free ones online).
Then, with the user you are trying to connect with, you need to make sure that user has access from the origin IP address (i.e. the IP on your Windows machine). This can be done with the following code from the mysql prompt.
GRANT ALL PRIVILEGES ON <your db name>.* TO <your user>#<your ip> IDENTIFIED BY '<your password>';
A less secure option would be to allow all inbound IPs by using the % wildcard.
After this you need to run the following command.
FLUSH PRIVILEGES;
That should be it.
I'm experiencing a strange MySQL error, seemingly related to the database's read-only flag. A Web application that uses MySQL is running on Debian 7.9. It was running well for weeks, if not more, while, suddenly, attempts to access the application-powered website started producing the following error message on a blank webpage:
Error: 500 - SQLSTATE[HY000]: General error: 1290 The MySQL server is
running with the --read-only option so it cannot execute this
statement
The following are the steps that I performed as part of my investigation:
found and read read relevant info on the Internet (some pointed to MySQL's read-only flag);
based on the above, tried to find the read-only flag in MySQL config. file (my.cnf) - couldn't find it there, but read that the default value for the flag is OFF anyway;
verified the filesystem to make sure there is plenty of disk space (df -h):
Filesystem Size Used Avail Use% Mounted on
udev 10M 0 10M 0% /dev
tmpfs 3.2G 1.4M 3.2G 1% /run
/dev/disk/by-uuid/xxxxxxxxxxxxxxxxx 113G 14G 94G 13% /
tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs 7.3G 72K 7.3G 1% /run/shm
ran mysqlcheck --all-databases: all tables are OK;
verified that there is plenty of RAM available on the server (free):
total used free shared buffers cached
Mem: 32898332 2090268 30808064 0 425436 970348
-/+ buffers/cache: 694484 32203848
Swap: 5105660 0 5105660
finally, I have decided to take a "snapshot" of MySQL-related processes (ps ax | grep mysql) during the problem's existence and after a temporary fix (DB restart), hoping that it could give people additional context for ideas; here are the corresponding results:
Problem:
20307 ? S 0:00 /bin/sh /usr/bin/mysqld_safe
20635 ? Sl 0:37 /usr/sbin/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib/mysql/plugin --user=mysql --pid-file=/var/run/mysqld/mysqld.pid --socket=/var/run/mysqld/mysqld.sock --port=3306
20636 ? S 0:00 logger -t mysqld -p daemon.error
36427 pts/0 S+ 0:00 grep mysql
No problem:
36948 pts/0 S 0:00 /bin/sh /usr/bin/mysqld_safe
37275 pts/0 Sl 0:00 /usr/sbin/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib/mysql/plugin --user=mysql --pid-file=/var/run/mysqld/mysqld.pid --socket=/var/run/mysqld/mysqld.sock --port=3306
37276 pts/0 S 0:00 logger -t mysqld -p daemon.error
38313 pts/0 S+ 0:00 grep mysql
UPDATE:
I just experienced the issue again and decided to check whether the global read-only flag is set to OFF or not, assuming the latter. My assumption has confirmed:
mysql> SELECT ##global.read_only;
+--------------------+
| ##global.read_only |
+--------------------+
| 1 |
+--------------------+
1 row in set (0.00 sec)
I guess, despite the default OFF value, since it is being overwritten by some process in the system, I will have to set the read-only flag to OFF explicitly and permanently via MySQL configuration file. Will report on results later in an answer.
If you're in AWS Aurora, you might be accessing the replica instance which is read-only so you need to use the DB Cluster endpoint instead.
As I see it there are two broad reasons for why your database is being set to read only:
1) MySQL is setting itself read only
I'm not sure what might cause MySQL to go read only, perhaps disk issues or corruption of database? In any case I'd expect something to appear in the logs, so check the MySQL (and system) logs.
2) A client is setting the database read only
Clients connecting to MySQL can set the database read only using the command:
SET GLOBAL read_only = ON;
however to do this the user is required to have SUPER privileges. This permission shouldn't be needed for websites, applications, etc that are using MySQL - keep it only for an admin account that you use for administering the database.
Lock down the permissions that each user has so they only have permission to do the things that they need on the databases / tables that are applicable. If you're using some out-of-the-box applications they should come with instructions detailing what permissions are required (e.g. SELECT, INSERT, DELETE, UPDATE).
Based on my question's comments (special thanks to #Eborbob) and my update, I have figured that some process in the system resets the read-only flag to ON (1), which seem to trigger the issue and results in the website becoming inaccessible. In order to fix the problem as well as make this fix persistent across software and server restarts, I decided to update MySQL configuration file my.cnf and restart the DB server.
After making the relevant update (in my case, addition) to the configuration file
read_only=0
let's verify that the flag is indeed set to OFF (0):
# mysql
mysql> SELECT ##global.read_only;
+--------------------+
| ##global.read_only |
+--------------------+
| 0 |
+--------------------+
1 row in set (0.00 sec)
Finally, let's restart MySQL server (for some reason, a dynamic reloading of MySQL configuration (/etc/init.d/mysql reload) didn't work, so I had to restart the database server explicitly:
service mysql stop
service mysql start
Voila! Now access to the website is restored. Will update my answer, if any changes will occur.
set global read_only = off;
make read only mode off later it will work sure.
Not related to the issue, but related to the error 'mysql read-only'.
Make sure you are not trying to write something to a slave instance of mysql.
I just experienced the same error and fixed it by connecting to the hostname of the mysql server as opposed to the IP address. I'm not sure why this fixed it but it did. Just FYI
the server might be set to recovery mode
find the innodb_force_recovery in my.cnf and uncomment it and restart the server then run the upgrade.
As Eborbob say it's probably a client,
Did you check your backup tool ?
Do you use some SQL proxy like proxySQL or maxscale ?
For exemple Mascale can enforce readonly by monitoring : https://jira.mariadb.org/browse/MXS-1859
Replication Manager can also change READ ONLY flag
The below error:-
The MySQL server is running with the --read-only option so it cannot execute this statement
It occurs when a user not having the write permission for the sql db tries to insert/update some data into the db.
It is quite a valid security error, as it is stating that you currently are having just --read-only rights and hence cannot execute a query that has anything to do with writing.
To resolve this error:-
Get the write access from the DBA.
e.g.
GRANT ALL PRIVILEGES ON database.table TO 'user'#'localhost';
The above query will grant all privileges to the user with username 'user'.
executing below statement worked for me
mysql> SET GLOBAL read_only = OFF;
This worked for me and you can try it.
Make a backup of your .sql file ( change your query )
Find all Engine=InnoDB
and replace them with Engine=MyISAM
and try executing again.