mysql的启动

1。直接用mysqld手工启动

[root@ora11g bin]# ./mysqld --defaults-file=../my.cnf
 :: [ERROR] Fatal error: Please read "Security" section of the manual to find out how to run mysqld as root!

 :: [ERROR] Aborting

 :: [Note] ./mysqld: Shutdown complete

[root@ora11g bin]# ./mysqld --defaults-file=../my.cnf --user=mysql
 :: InnoDB: The InnoDB memory heap is disabled
 :: InnoDB: Mutexes and rw_locks use InnoDB's own implementation
 :: InnoDB: Compressed tables use zlib
 :: InnoDB: Using Linux native AIO
 :: InnoDB: Initializing buffer pool, size = 128.0M
 :: InnoDB: Completed initialization of buffer pool
 :: InnoDB: highest supported file format is Barracuda.
InnoDB: The log sequence number in ibdata files does not match
InnoDB: the log sequence number in the ib_logfiles!
 ::  InnoDB: Database was not shut down normally!
InnoDB: Starting crash recovery.
InnoDB: Reading tablespace information from the .ibd files...
InnoDB: Restoring possible half-written data pages from the doublewrite
InnoDB: buffer...
 ::  InnoDB: Waiting for the background threads to start
 :: InnoDB:  started; log sequence number
 :: [Note] Server
 :: [Note]   - '0.0.0.0' resolves to '0.0.0.0';
 :: [Note] Server socket created on IP: '0.0.0.0'.
 :: [Note] Event Scheduler: Loaded  events
 :: [Note] ./mysqld: ready for connections.
Version:   Source distribution
[root@ora11g ~]# ps -ef | grep mysql
mysql          : pts/    :: ./mysqld --defaults-file=../my.cnf --user=mysql
root           : pts/    :: grep mysql
[root@ora11g ~]# 

2.安全启动

[root@ora11g bin]# ./mysqld_safe --defaults-file=../my.cnf --user=mysql &
[]
[root@ora11g bin]#  :: mysqld_safe Logging to '/usr/local/mysql/data/ora11g.err'.
 :: mysqld_safe Starting mysqld daemon with databases from /usr/local/mysql/data

[root@ora11g bin]# ps -ef | grep mysql
root           : pts/    :: /bin/sh ./mysqld_safe --defaults-file=../my.cnf --user=mysql
mysql          : pts/    :: /usr/local/mysql/bin/mysqld --defaults-
root           : pts/    :: grep mysql
[root@ora11g bin]# 

3.用服务的方式启动

[root@ora11g support-files]#
[root@ora11g support-files]# ./mysql.server start
Starting MySQL                                             [  OK  ]
[root@ora11g support-files]# ps -ef | grep mysql
root              : pts/    :: /bin/sh /usr/local/mysql/bin/mysqld_safe --datadir=/usr/local/mysql/data --pid-file=/usr/local/mysql/data/ora11g.pid
mysql         : pts/    :: /usr/local/mysql/bin/mysqld --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data --plugin-
root           : pts/    :: grep mysql
[root@ora11g support-files]# 

把mysql.server cp到 /etc/rc.d/init.d/mysql，再chkconfig --add mysql就ok了

[root@ora11g support-files]# cp mysql.server  /etc/rc.d/init.d/mysql
[root@ora11g support-files]# chkconfig --add mysql
[root@ora11g support-files]# chkconfig --list | grep mysql
mysql           :off   :off   :on    :on    :on    :on    :off
[root@ora11g support-files]# service mysqld stop
mysqld: unrecognized service
[root@ora11g support-files]# service mysql stop
Shutting down MySQL.                                       [  OK  ]
[root@ora11g support-files]# service mysql start
Starting MySQL..                                           [  OK  ]
[root@ora11g support-files]# ps -ef | grep mysql
root              : pts/    :: /bin/sh /usr/local/mysql/bin/mysqld_safe --datadir=/usr/local/mysql/data --pid-file=/usr/local/mysql/data/ora11g.pid
mysql          : pts/    :: /usr/local/mysql/bin/mysqld --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data --plugin-
root           : pts/    :: grep mysql
[root@ora11g support-files]# 

查看mysql的启动时的参数：

[root@ora11g bin]# ./mysqld --help --verbose | less