For some reason, I can't start MySql.
$ sudo /etc/init.d/mysql start
[sudo] password for abigail:
Starting MySQL.............................................[FAILED]................................................................................
What caused this?
This is what in my /var/lib/mysql
$ ll -h /var/lib/mysql
total 1005M
-rw-rw----. 1 mysql mysql 16K Mar 28 11:08 aria_log.00000001
-rw-rw----. 1 mysql mysql 52 Mar 28 11:08 aria_log_control
-rw-rw----. 1 mysql mysql 908M Mar 31 20:10 ibdata1
-rw-rw----. 1 mysql mysql 48M Mar 31 20:09 ib_logfile0
-rw-rw----. 1 mysql mysql 48M Mar 31 20:10 ib_logfile1
-rw-rw----. 1 mysql mysql 5 Mar 28 11:09 localhost.pid
-rw-rw----. 1 mysql mysql 0 Oct 29 23:04 multi-master.info
drwx--x--x. 2 mysql mysql 4.0K Oct 29 23:01 mysql
drwx------. 2 mysql mysql 19 Oct 29 23:01 performance_schema
-rw-rw----. 1 mysql mysql 24K Mar 28 11:09 tc.log
drwx------. 2 mysql mysql 4.0K Nov 3 22:10 test
I think I might have to reinstall mysql.
my.cnf is supposed to be in /etc/my.cnf.
Check the start log for the error message, like in /var/log/mysqld.log.
Related
I'm using MariaDB 10.5.9-1 on Manjaro 5.10.23-1.
I initialized mariadb database directory using this command:
$ sudo mariadb-install-db --user=shaouai --basedir=/usr --datadir=/var/lib/mysql
After data directory initialization, permissions and ownership of /var/lib/mysql:
$ ls -ld /var/lib/mysql
drwx------ 5 shaouai root 4096 Apr 10 00:08 mysql
$ ls -lh /var/lib/mysql
total 109M
-rw-rw---- 1 shaouai shaouai 24K Apr 10 00:08 aria_log.00000001
-rw-rw---- 1 shaouai shaouai 52 Apr 10 00:08 aria_log_control
-rw-rw---- 1 shaouai shaouai 972 Apr 10 00:08 ib_buffer_pool
-rw-rw---- 1 shaouai shaouai 12M Apr 10 00:08 ibdata1
-rw-rw---- 1 shaouai shaouai 96M Apr 10 00:08 ib_logfile0
drwx------ 2 shaouai shaouai 4.0K Apr 10 00:08 mysql
drwx------ 2 shaouai shaouai 4.0K Apr 10 00:08 performance_schema
drwx------ 2 shaouai shaouai 4.0K Apr 10 00:08 test
And there's one another directory /run/mysqld, which file mysqld.sock resides in by default when server is up and running, has permissions and ownership:
$ ls -ld /run/mysqld/
drwxr-xr-x 2 shaouai shaouai 60 Apr 10 08:31 /run/mysqld/
I have no idea when /run/mysqld was created, maybe the first time server started successfully.
mysqld_safe --datadir=/var/lib/mysql can start server successfully.
But the problem is, after every reboot, the permissions and ownership of /var/lib/mysql and /run/mysqld was reset to mysql:mysql :
$ ls -ld /var/lib/mysql
drwx------ 5 mysql mysql 4096 Apr 10 00:08 mysql
$ ls -lh /var/lib/mysql
total 109M
-rw-rw---- 1 shaouai shaouai 24K Apr 10 00:08 aria_log.00000001
-rw-rw---- 1 shaouai shaouai 52 Apr 10 00:08 aria_log_control
-rw-rw---- 1 shaouai shaouai 972 Apr 10 00:08 ib_buffer_pool
-rw-rw---- 1 shaouai shaouai 12M Apr 10 00:08 ibdata1
-rw-rw---- 1 shaouai shaouai 96M Apr 10 00:08 ib_logfile0
drwx------ 2 shaouai shaouai 4.0K Apr 10 00:08 mysql
drwx------ 2 shaouai shaouai 4.0K Apr 10 00:08 performance_schema
drwx------ 2 shaouai shaouai 4.0K Apr 10 00:08 test
$ ls -ld /run/mysqld/
drwxr-xr-x 2 mysql mysql 60 Apr 10 08:31 /run/mysqld/
Thus due to various "permission denied", MariaDB server failed to start.
There's one question totally the same as mine.
Here is full output of systemctl cat mariadb.service.
I'm not sure why you changed the user. It may not be a good idea. But assuming there is a good reason, below explains your situtation:
It looks like the mysqld_safe may have changed the permissions. If you start this way for testing add --user=shaouai to the arguments.
To allow systemd to default start as the user shaouai
systemctl edit mariadb.service
Add:
[Service]
User=shaouai
Group=shaouai
Then:
chown -R shaouai: /var/lib/mysql /run/mysqld/
Then systemctl restart mariadb.service.
This will start the service as this user instead of the default mysql user.
I am using MariaDB with MyRocks engine. After short time, I try to insert bunch of data into some tables (tables could be InnoDB and MyRocks engine), my disk grows very fast. I check MariaDB data directory and I see this:
drwxr-x--x 2 mysql mysql 12K Jun 26 12:07 #rocksdb
drwxr-xr-x 7 mysql mysql 4.0K Jun 26 12:07 .
drwxr-xr-x 6 root root 4.0K Jun 21 10:22 ..
-rw-rw---- 1 mysql mysql 1.1G Jun 25 21:39 1.000001
-rw-rw---- 1 mysql mysql 1.1G Jun 25 21:40 1.000002
-rw-rw---- 1 mysql mysql 1.6G Jun 25 21:44 1.000003
-rw-rw---- 1 mysql mysql 1.1G Jun 25 21:48 1.000004
-rw-rw---- 1 mysql mysql 1.1G Jun 25 21:50 1.000005
-rw-rw---- 1 mysql mysql 218M Jun 26 06:53 1.000006
-rw-rw---- 1 mysql mysql 357 Jun 26 06:56 1.000007
-rw-rw---- 1 mysql mysql 1.1G Jun 26 07:06 1.000008
-rw-rw---- 1 mysql mysql 1.1G Jun 26 07:09 1.000009
-rw-rw---- 1 mysql mysql 1.1G Jun 26 07:17 1.000010
-rw-rw---- 1 mysql mysql 1.1G Jun 26 07:19 1.000011
-rw-rw---- 1 mysql mysql 1.1G Jun 26 07:22 1.000012
-rw-rw---- 1 mysql mysql 1.1G Jun 26 07:24 1.000013
-rw-rw---- 1 mysql mysql 1.1G Jun 26 07:27 1.000014
-rw-rw---- 1 mysql mysql 1.1G Jun 26 07:29 1.000015
-rw-rw---- 1 mysql mysql 1.1G Jun 26 07:32 1.000016
-rw-rw---- 1 mysql mysql 1.1G Jun 26 07:34 1.000017
-rw-rw---- 1 mysql mysql 1.1G Jun 26 07:37 1.000018
-rw-rw---- 1 mysql mysql 1.1G Jun 26 07:40 1.000019
-rw-rw---- 1 mysql mysql 1.1G Jun 26 07:42 1.000020
-rw-rw---- 1 mysql mysql 1.1G Jun 26 07:45 1.000021
-rw-rw---- 1 mysql mysql 1.1G Jun 26 07:51 1.000022
-rw-rw---- 1 mysql mysql 1.1G Jun 26 08:00 1.000023
-rw-rw---- 1 mysql mysql 1.1G Jun 26 08:07 1.000024
-rw-rw---- 1 mysql mysql 1.1G Jun 26 08:15 1.000025
...
I see many files whose name contains only numbers. I don't know those files were created by MyRocks or MySQL, and can I delete them?
A guess: You configured the following, assuming it turned on binlogging:
log_bin = 1
and those are binlogs starting with the '1'.
A new file every few minutes implies a huge amount of writes (such as the inserts you mention).
If you don't need binlogging and change to this and restart, then the files should stop being created:
log_bin = OFF
The files (1.*) can be removed.
If they don't stop, then my guess is wrong.
If you do need binlogging (for replication and/or point-in-time backups, then we need to investigate the huge rapidity of them.
I'll bet you did a restart about Jun 26 06:53.
Rocksdb is probably not relevant to the question. (But I could be wrong.)
When i try to start mysql, i get the following error:
170228 15:14:38 mysqld started
InnoDB: Error: log file ./ib_logfile2 is of different size 0 0 bytes
InnoDB: than specified in the .cnf file 0 5242880 bytes!
170228 15:14:38 Can't init databases
170228 15:14:38 Aborting
170228 15:14:38 InnoDB: Warning: shutting down a not properly started
InnoDB: or created database!
170228 15:14:38 /usr/local/mysql/bin/mysqld: Shutdown Complete
170228 15:14:38 mysqld ended
When i delete this log file, as i understand i should do in order to fix it, i get the follofwing error:
170228 15:21:39 mysqld started
170228 15:21:39 InnoDB: Log file ./ib_logfile2 did not exist: new to be created
170228 15:21:39 Can't init databases
170228 15:21:39 Aborting
170228 15:21:39 InnoDB: Warning: shutting down a not properly started
InnoDB: or created database!
170228 15:21:39 /usr/local/mysql/bin/mysqld: Shutdown Complete
170228 15:21:39 mysqld ended
After that i actually return the original situation, where "ib_logfile2 is of different size 0 0 bytes".
How can i fix this issue?
Edit:
Here is my DB data folder:
drwxr-xr-x 2 mysql mysql 132 Feb 27 15:38 forum_test
-rw-r--r-- 1 mysql mysql 10737418240 Feb 27 15:41 ibdata1
-rw-r--r-- 1 mysql mysql 10737418240 Feb 27 15:33 ibdata2
-rw-r--r-- 1 mysql mysql 10737418240 Feb 27 15:31 ibdata3
-rw-r--r-- 1 mysql mysql 10737418240 Feb 27 15:37 ibdata4
-rw-r--r-- 1 mysql mysql 10737418240 Feb 27 15:35 ibdata5
-rw-rw---- 1 mysql mysql 5242880 Feb 27 19:03 ib_logfile0
-rw-rw---- 1 mysql mysql 5242880 Feb 27 16:20 ib_logfile1
-rw-rw---- 1 mysql mysql 0 Feb 28 15:21 ib_logfile2
-rw-r--r-- 1 mysql mysql 21076 Feb 27 18:58 my.cnf_abc
drwxr-xr-x 2 mysql mysql 4096 Feb 27 15:37 mysql
drwxr-xr-x 2 mysql mysql 102 Feb 27 15:39 test
drwxr-xr-x 2 mysql mysql 16384 Feb 27 15:39 abc
drwxr-xr-x 2 mysql mysql 4096 Feb 27 15:37 abcAdv
drwxr-xr-x 2 mysql mysql 36864 Feb 27 15:39 abcExcel
drwxr-xr-x 2 mysql mysql 81 Feb 27 15:37 abcHul
drwxr-xr-x 2 mysql mysql 4096 Feb 27 15:39 abcMesh
drwxr-xr-x 2 mysql mysql 4096 Feb 27 15:39 abcMilt
-rw-rw---- 1 mysql mysql 4603 Feb 28 15:21 abc-restore180.log
drwxr-xr-x 2 mysql mysql 4096 Feb 27 15:39 abcSold
drwxr-xr-x 2 mysql mysql 137 Feb 27 15:39 abcVod
I don't know if this will help you cause I use Windows and not Ubuntu like almost every other user here. So anyway, go to the C:/xampp/mysql/data/ directory and change "ibdata1" to "ibdata1---" or rather add "---" to "ibdata1" and restart xampp and mysql
It will create a new ibdata1 file when you run mysql and start working normally.
Hope this helps :)
I'm pretty lost right now.
The RAID controller auf my server broke and all attached hard drives were corrupted. Luckily I copied the plain files off the server right before the crash (phew).
I set up the new server with Ubuntu 12.04 and a fresh mysql installation. I copied the backup off a server directly to the new one, without saving them to a windows machine (to prevent privileges errors).
My back up folder looks like this:
drwx------ 15 jensma jensma 4.0K Dec 12 18:09 .
drwxr-xr-x 76 jensma jensma 4.0K Nov 22 12:00 ..
drwx------ 2 mysql mysql 4.0K Nov 21 02:50 gamefilesenter code here
drwx------ 2 mysql mysql 4.0K Aug 5 00:17 circuitboard
-rw-r--r-- 1 mysql mysql 0 Oct 25 07:49 debian-5.5.flag
-rw-rw---- 1 mysql mysql 26M Dec 12 02:22 ibdata1
-rw-rw---- 1 mysql mysql 5.0M Dec 12 18:09 ib_logfile0
-rw-rw---- 1 mysql mysql 5.0M Dec 12 02:22 ib_logfile1
drwx------ 2 mysql mysql 4.0K Oct 25 07:49 mysql
-rw-rw---- 1 mysql mysql 6 Oct 25 07:49 mysql_upgrade_info
drwx------ 2 mysql mysql 4.0K Oct 25 07:49 performance_schema
drwx------ 2 mysql mysql 4.0K May 25 2013 phpmyadmin
drwx------ 2 mysql mysql 4.0K Jul 4 18:29 test
drwx------ 2 mysql mysql 4.0K May 19 2013 usr_web10_5
A folder contains data like this:
drwx------ 2 mysql mysql 4096 Aug 5 00:17 .
drwx------ 15 jensma jensma 4096 Dec 12 18:09 ..
-rw-rw---- 1 mysql mysql 65 Jul 10 15:04 db.opt
-rw-rw---- 1 mysql mysql 8620 Aug 1 23:38 stat.frm
-rw-rw---- 1 mysql mysql 8700 Aug 5 00:17 user.frm
I just copied the whole content to /var/lib/mysql and ran
sudo /usr/sbin/mysqld –innodb_log_file_size=5242880 –innodb_force_recovery=6
Well, the command kinda works - the shell shows up after half a minute. But the database is still empty :/
I'm pretty now to this. I do have full admin access to the server.
Any help is appreciated, thanks!
I see today that
show databases
displays an unknown database:
(msl_ampcs_v4_0_0_2g)> show databases;
+----------------------+
| Database |
+----------------------+
| information_schema |
| #mysql50#.ssh |
| global_lad
Normally when I see something like that it is due to a bad file in /var/lib/mysql:
-rw-r--r-- 1 mysql mysql 1663 Mar 17 2011 /var/lib/mysql/ca-cert.pem
drwx------ 2 mysql mysql 4096 Jun 18 15:00 /var/lib/mysql/global_lad
drwx------ 2 mysql mysql 4096 Jun 18 15:00 /var/lib/mysql/global_lad_unit_test
-rw-rw---- 1 mysql mysql 3231711232 Aug 22 07:20 /var/lib/mysql/ibdata1
-rw-rw---- 1 mysql mysql 5242880 Aug 22 07:20 /var/lib/mysql/ib_logfile0
-rw-rw---- 1 mysql mysql 5242880 Aug 21 16:25 /var/lib/mysql/ib_logfile1
-rw-rw---- 1 mysql mysql 5 Feb 21 2013 /var/lib/mysql/istsdb2.jpl.nasa.gov.pid
-rw-rw---- 1 mysql mysql 4596466 Oct 15 2010 /var/lib/mysql/istsdb2-slow.log
drwx------ 2 mysql mysql 4096 Jul 13 2011 /var/lib/mysql/msl_ampcs_v2_0_0
drwx------ 2 mysql mysql 4096 Jul 21 2012 /var/lib/mysql/msl_ampcs_v3_0_0
drwx------ 2 mysql mysql 4096 Jun 20 02:55 /var/lib/mysql/msl_ampcs_v4_0_0
drwx------ 2 mysql mysql 4096 Sep 5 19:45 /var/lib/mysql/msl_ampcs_v4_0_0_2g
drwx------ 2 mysql mysql 4096 Sep 30 2010 /var/lib/mysql/msl_gdsdb_v5_0
drwx------ 2 mysql mysql 4096 Jan 19 2011 /var/lib/mysql/msl_gdsdb_v5_5
drwx------ 2 mysql mysql 4096 Nov 21 2011 /var/lib/mysql/msl_gdsdb_v5_6
drwx------ 2 mysql root 4096 Mar 23 2010 /var/lib/mysql/mysql
srwxrwxrwx 1 mysql mysql 0 Feb 21 2013 /var/lib/mysql/mysql.sock
-rw------- 1 root root 841 Jun 10 2010 /var/lib/mysql/nohup.out
drwx------ 2 mysql mysql 4096 Feb 5 2013 /var/lib/mysql/pdpp_automation
-rw-r--r-- 1 mysql mysql 1310 Mar 17 2011 /var/lib/mysql/server-cert.pem
-rw-r--r-- 1 mysql mysql 1679 Mar 17 2011 /var/lib/mysql/server-key.pem
But nothing like that is present. The nohup shouldn't be there. But
#mysql50#.ssh
does not appear.