How to Optimize MySQL


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How to Optimize MySQLLast Modified: Sep 14, 2013, 11:31 am
CentOS
There is a default my.cnf that comes with mysql (4+5) that will make mysql run a bit quicker if you have 2+ gig of ram

cp -f /usr/share/mysql/my-large.cnf /etc/my.cnf

There is also my-huge.cnf, or my-medium.cnf depending on your hardware setup.   Check the contents of these my*.cnf files for the one that's right for you.

*NOTE* the log-bin option is enabled  by default.  This will quickly use a lot of disk space.  It's recommended to comment out the log-bin line from your /etc/my.cnf, if it exists.



Debian/FreeBSD
We don't currently have optimized my.cnf files for these OSs.
The /etc/my.cnf will rely on the internal defaults in the mysqld binaries.





MySQL 4.x - Depreciated
If you've got mysql 4 (and not mysql 5), then you can use the following code in your /etc/my.cnf:

Referenced from the Forum

vi /etc/my.cnf [ENTER]

Press 'i' to enter insert mode, then paste:

[mysqld]
local-infile=0
skip-locking
query_cache_limit=1M
query_cache_size=32M
query_cache_type=1
max_connections=500
interactive_timeout=100
wait_timeout=100
connect_timeout=10
thread_cache_size=128
key_buffer=16M
join_buffer=1M
max_allowed_packet=16M
table_cache=1024
record_buffer=1M
sort_buffer_size=2M
read_buffer_size=2M
max_connect_errors=10
# Try number of CPU's*2 for thread_concurrency
thread_concurrency=2
myisam_sort_buffer_size=64M
server-id=1

[safe_mysqld]
err-log=/var/log/mysqld.log
open_files_limit=8192

[mysqldump]
quick
max_allowed_packet=16M

[mysql]
no-auto-rehash
#safe-updates

[isamchk]
key_buffer=64M
sort_buffer=64M
read_buffer=16M
write_buffer=16M

[myisamchk]
key_buffer=64M
sort_buffer=64M
read_buffer=16M
write_buffer=16M

[mysqlhotcopy]
interactive-timeout

Press ctrl-c to exit insert mode.  Then press shift-Z shift-Z to save and quit.   Restart mysqld:
Redhat:

/sbin/service mysqld restart


FreeBSD:

/usr/local/etc/rc.d/mysqld restart

 
Related Helpfiles
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I have many mysql-bin files which are using up a lot of space

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