MySQL修改最大連接數

使用MySQL時候，遇到如下報錯：Can not connect to MySQL server. Too many connections。

解決辦法：修改MySQL最大連接數。

1 打開MySQL的配置文件：

vi /etc/my.cnf

2 加入max_connections=500一行（如果有該行，直接修改值即可）。

# For advice on how to change settings please see
# http://dev.mysql.com/doc/refman/5.7/en/server-configuration-defaults.html

#需要主從服務器時，放開此處配置 begin
[mysqld]
#log-bin=mysql-bin   
#[必須]啟用二進制日志
#server-id=138        
#[必須]服務器唯一ID，默認是1，一般取IP最后一段

#需要主從服務器時，放開此處配置 end
lower_case_table_names=1

[client]
default-character-set=utf8
[mysqld]
character-set-server=utf8
default-time_zone = '+8:00'
max_connections=500

#
# Remove leading # and set to the amount of RAM for the most important data
# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.
# innodb_buffer_pool_size = 128M
#
# Remove leading # to turn on a very important data integrity option: logging
# changes to the binary log between backups.
# log_bin
#
# Remove leading # to set options mainly useful for reporting servers.

3 重啟MySQL服務：

service mysqld restart