module-mysql/files/config/my.cnf.CentOS
mh a72ab41660 add innodb_file_per_table option by default
mysql has one innodb file per default and this can become very
huge, which can trigger various issues [1]. So in general it
is recommended to set the innodb_file_per_table option [2].

[1] http://forums.mysql.com/read.php?35,121880,121886
[2] http://dev.mysql.com/doc/refman/5.0/en/innodb-multiple-tablespaces.html
2012-01-17 22:31:44 +01:00

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[mysqld]
datadir=/var/lib/mysql/data
log-bin=/var/lib/mysql/mysql-bin
expire_logs_days=5
socket=/var/lib/mysql/mysql.sock
# Default to using old password format for compatibility with mysql 3.x
# clients (those using the mysqlclient10 compatibility package).
old_passwords=0
bind-address=127.0.0.1
skip-bdb
# 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 = 64M
# Log slow queries. Slow queries are queries which take more than the
# amount of time defined in "long_query_time" or which do not use
# indexes well, if log_long_format is enabled. It is normally good idea
# to have this turned on if you frequently add new queries to the
# system.
log_slow_queries
# 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 = 4
# 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 = 50MB
innodb_file_per_table
query_cache_limit=5M
[mysql.server]
user=mysql
basedir=/usr
[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid