标签（linux）： mysql
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# if set to 1 , InnoDB will flush (fsync) the transaction logs to the
# disk at each commit, which offers full ACID behavior. if you are willing to compromise this safety,
# and you are running small transactions , you may set this to 0 or 2 to reduce disk I/O to the logs,
# Value 0 means that the log is only written to the log file and the log file flushed to disk approximately once per second.
# Value 2 means the log is written to the log file at each commit , but the log file is only flushed to disk approximately once per second
innodb_flush_log_at_trx_commit =1
如果设置为1，InnoDB将刷新(fsync)事务日志
每个提交的磁盘，它提供了完全的ACID行为。如果你愿意在安全问题上妥协，
你运行的是小的事务，你可以把它设置为0或2来减少日志的磁盘输入，
值0意味着日志只写到日志文件，日志文件被刷新到磁盘，大约每秒一次。
值2意味着将日志写入每个提交的日志文件中，但是日志文件只被刷新到磁盘，大约每秒一次。
innodb_flush_log_at_trx_commit = 1
mysql修改命令行提示符的方法
命令行生效
mysql> prompt u@db01
:m:s->
PROMPT set to 'u@db01
:m:s->'
root@db01 12:35:54->
root@db01 12:35:55->
root@db01 12:35:55->
永久生效
加放/etc/my.cnf [mysql]模块中，注意不是mysqld
root@db01 12:41:03 mysql->quit
Bye
[root@db01 ~]# head /etc/my.cnf
# For advice on how to change settings please see
# http://dev.mysql.com/doc/refman/5.6/en/server-configuration-defaults.html
# *** DO NOT EDIT THIS FILE. It's a template which will be copied to the
# *** default location during install, and will be replaced if you
# *** upgrade to a newer version of MySQL.
[mysql]
prompt=\u@db01 \r:\m:\s mysql->