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On Linux, can you ensure that MySQL leaves one core free?
(We have a small Python server that can become unresponsive when MySQL running on the same box is under load.)
3 ways I can think of...
Use the command taskset.
This command will "fix" specific core (or list of cores) to a specific process.
Consult the man page how to use it
Create Virtual machine on your "little" server and run the mysql on that VM.
This will promiss more stability to both services
Use the "nice" values to make sure the python priority is higher then the mysql priority.
(This solution is the least recommanded of all three, but in some cases it can be valid)
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I'm needing to make a stand-alone application with NodeJS for Windows, Mac, and Linux
My first option for the database was SQLite but it's very small for my big data
My reason for using MySQL is that support many data and it's quickly
But the big problem is installing MySQL that it's hard to install it with end-user
And the important note is I packaging the NodeJS project and convert to exe file
Also, I use mosquito broker in this project and still no problem in the run this application.
Can I use MySQL like SQLite (stand-alone)?
Thanks
It's bad if you think Sqlite is weak
Because it's the best choice for your needing
It's simple, high performance, stand-alone and many features
My suggestion is using SQLite
Finally, I decide to use the same Sqlite because :
"SQLite supports databases up to 140 terabytes in size"
Also, I assign database file for each device and I think that is the best solution without Mysql database
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I have a simple yet tricky question - as far as I know Facebook, Google, etc have more than one server for obvious reasons - maintain 100% uptime, load distribution and some more.
My question is how do they synchronize the data on the sql/nosql tables behind each and every server. In other words, what do I need to look for in order to understand how they do that data synchronization?
For smaller applications data is replicated (a built in feature of several database systems) between nodes so that identical copies exist in more than one place.
Larger systems are either sharded out so different data exists in different places or clustered.
http://www.highscalability.com is a good resource for understanding the problems of running and scaling large web applications
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I need reproduce the exact same environment of a system in production, it's working with mysql 4.1.3b-beta-nt-max version, where I can get this exact version? I have looking with google but it seems like it's no longer available anywhere.
Thanks.
Try searching historical databases such as
http://www.oldapps.com/mysql_server.php?old_mysql_server=131
...in a pinch, you can install a "similar" version (such as the one above, 4.1.3beta-win), and then replace the binaries with the production ones. MySQL doesn't do strange things with the registry, so this procedure should suffice.
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I have a few questions regarding MySQL server running under Windows Server 2008 R2.
1) How do I check the number of allowed connections?
2) How do I turn on query logging to see performance of queries executed?
3) As I understand MySQL is multithreaded, will increasing the number of allowed connections increase performance on a Quad Core system?
4) Will having a cluster setup increase performance?
5) How can I setup load shedding with multiple MySQL servers in a cluster?
Thanks
So in the end I moved the question and I got a brilliant answer on that side.
The answer can be viewed at https://dba.stackexchange.com/questions/17511/mysql-server-performance/17540#17540
Thanks
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As funny as it is, most good MySQL editors are Windows based.
I am looking for a tool (US$400 top) for Ubuntu that can:
Auto complete tables and fields names + reserved keywords.
syntax coloring.
inline row content edit.
copy tables/databases from one host to an other.
I think the best Windows based is SQLyog, but it is a nightmare working on Wine.
I highly recommend DbVisualizer. It's a Java application and runs on Linux, Mac OS X and Windows. The MySQL JDBC driver is bundled in the package.
you might look at these sql clients below, all of them are open-source:
http://www.sql-workbench.net
http://executequery.org