mysql 修改了 my.cnf，重启没有生效的一个原因。

比如添加一下几个配置

max_connections=1000
wait_timeout=100
interactive_timeout=100
skip-name-resolve

必须把这些内容添加到 [mysqld]的后面。

我之前是添加到整个文件的结尾处。结尾的处已经不是[mysqld]的配置了 。比如如下的配置文件 如果加到结尾处。不会生效。

[mysqld]
port            = 3306
socket          = /usr/local/mysql/var/mysql.sock
skip-locking
key_buffer = 16M
max_allowed_packet = 1M
table_cache = 64
sort_buffer_size = 512K
net_buffer_length = 8K
read_buffer_size = 256K
read_rnd_buffer_size = 512K
myisam_sort_buffer_size = 8M

[mysqldump]
quick
max_allowed_packet = 16M

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

[isamchk]
key_buffer = 20M
sort_buffer_size = 20M
read_buffer = 2M
write_buffer = 2M

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

[mysqlhotcopy]
interactive-timeout