MySQL 1040 錯誤 Too many connections

Can not connect to MySQL server
Error: Too many connections
Errno.: 1040

原因：

因爲 my.ini 中設定的併發連接數太少或者系統繁忙導致連接數被佔滿。

解決方式：

打開 MYSQL 安裝目錄打開 my.ini 找到 max_connections 默認是 100， 一般設置到500～1000比較合適，重啓 MySQL ，解決 MySQL 1040 錯誤。

高手優化的MYSQL my.ini的1000人在線配置。

#This File was made using the WinMySQLAdmin 1.4 Tool
#2004-2-23 16:28:14
#Uncomment or Add only the keys that you know how works.
#Read the MySQL Manual for instructions
[mysqld]
basedir=D:/mysql
#bind-address=210.5.*.*
datadir=D:/mysql/data
#language=D:/mysql/share/your language directory
#slow query log#=
#tmpdir#=
#port=3306
set-variable = max_connections=1000
skip-locking
#skip-networking
set-variable = key_buffer=384M
set-variable = max_allowed_packet=1M
set-variable = table_cache=512
set-variable = sort_buffer=2M
set-variable = record_buffer=2M
set-variable = thread_cache=8
# Try number of CPU’s*2 for thread_concurrency
set-variable = thread_concurrency=8
set-variable = myisam_sort_buffer_size=64M
#set-variable = connect_timeout=5
#set-variable = wait_timeout=5
server-id = 1
[isamchk]
set-variable = key_buffer=128M
set-variable = sort_buffer=128M
set-variable = read_buffer=2M
set-variable = write_buffer=2M
[myisamchk]
set-variable = key_buffer=128M
set-variable = sort_buffer=128M
set-variable = read_buffer=2M
set-variable = write_buffer=2M
[WinMySQLadmin]
Server=D:/mysql/bin/mysqld-nt.exe
重啓一下MYSQL服務就OK了