推一个mysql5.5的多实例的配置文件

[mysqld_multi]
mysqld = /usr/local/mysql/bin/mysqld_safe
mysqladmin = /usr/local/mysql/bin/mysqladmin
#log = /usr/local/mysql/log/mysqld_multi.log
user = root 
password = mysql

#[client]
##password    = your_password
#port        = 3306
#socket        = /usr/local/mysql/tmp/mysql.sock

# The MySQL server
[mysqld3306]
port        = 3306
socket        = /mysql_data/3306/tmp/3306.sock
pid-file     = /mysql_data/3306/tmp/3306.pid
basedir     = /usr/local/mysql
datadir     = /mysql_data/3306/data
log-bin        = /mysql_data/3306/log-bin/mysql-bin
log-error    = /mysql_data/3306/log-error/err.log
#slow-query-log    = /mysql_data/3306/log-slow/log-slow.log
lc-messages-dir = /usr/local/mysql/share
server-id    = 1
bind-address    = 0.0.0.0
skip-external-locking
key_buffer_size = 16M
max_allowed_packet = 1M
table_open_cache = 64
sort_buffer_size = 512K
net_buffer_length = 8K
read_buffer_size = 256K
read_rnd_buffer_size = 512K
myisam_sort_buffer_size = 8M
# binary logging format - mixed recommended
binlog_format=row
# Uncomment the following if you are using InnoDB tables
#innodb_data_home_dir = /usr/local/mysql/mysql_data
#innodb_data_file_path = ibdata1:10M:autoextend
#innodb_log_group_home_dir = /usr/local/mysql/mysql_data
# You can set .._buffer_pool_size up to 50 - 80 %
# of RAM but beware of setting memory usage too high
#innodb_buffer_pool_size = 16M
#innodb_additional_mem_pool_size = 2M
# Set .._log_file_size to 25 % of buffer pool size
#innodb_log_file_size = 5M
#innodb_log_buffer_size = 8M
#innodb_flush_log_at_trx_commit = 1
#innodb_lock_wait_timeout = 50

[mysqldump]
quick
max_allowed_packet = 16M

[mysql]
no-auto-rehash
# Remove the next comment character if you are not familiar with SQL
#safe-updates

[myisamchk]
key_buffer_size = 20M
sort_buffer_size = 20M
read_buffer = 2M
write_buffer = 2M

[mysqlhotcopy]
interactive-timeout

/usr/local/mysql/bin/mysqld_multi --defaults-file=/etc/my3306.cnf start 3306   启动
/usr/local/mysql/bin/mysqld_multi --defaults-file=/etc/my3306.cnf --tcp-ip stop 3306   经常关不掉，不知道为啥  也没日志。。。
#/usr/local/mysql/bin/mysqladmin -S /mysql_data/3306/tmp/3306.sock shutdown   关闭