Setting this option is a trade-off between your durability requirement
and performance requirement.
http://dev.mysql.com/doc/refman/5.1/en/innodb-parameters.html#sysvar_innodb_flush_log_at_trx_commit
0 gives best performance (write + flush once every second). 1 gives best
durability (write + flush after each commit). 2 writes the log buffer to
the log file at every commit, but flush it once every second.
On 10/16/2010 05:03 PM, short cutter wrote:
Hello,
Does innodb_flush_log_at_trx_commit = 1 or 2 make a busy mysql server
bad performance?
We found that setting it to 0 will make disk IO decrease a lot.
Thanks.
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