每次我重新启动MySQL时都会出现以下警告:
[警告] 缓冲警告:更改的限制:max_connections:214(请求800)
所以我必须更改 max_connections
变量:
set global max_connections = 800;
但是/etc/my.cf
中设置了max_connections
:
[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
max_connections = 800
我还修改了mysqld.service
:
# Start main service
ExecStart=/usr/bin/mysqld_safe --defaults-file=/etc/my.cnf
我已将 Centos 的最大打开文件数从 1024 提高到 2000:
ulimit -Sa | grep "open files"
open files (-n) 2000
但问题仍然存在。
Mysql日志开始:
150924 13:15:04 mysqld_safe mysqld from pid file
/var/run/mysqld/mysqld.pid ended
150924 13:15:04 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
2015-09-24 13:15:04 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2015-09-24 13:15:04 0 [Note] /usr/sbin/mysqld (mysqld 5.6.25) starting as process 29997 ...
2015-09-24 13:15:04 29997 [Warning] Buffered warning: Changed limits: max_open_files: 1024 (requested 5000)
2015-09-24 13:15:04 29997 [Warning] Buffered warning: Changed limits: max_connections: 214 (requested 800)
2015-09-24 13:15:04 29997 [Warning] Buffered warning: Changed limits: table_open_cache: 400 (requested 2000)
2015-09-24 13:15:04 29997 [Note] Plugin 'FEDERATED' is disabled.
2015-09-24 13:15:04 29997 [Note] InnoDB: Using atomics to ref count buffer pool pages
2015-09-24 13:15:04 29997 [Note] InnoDB: The InnoDB memory heap is disabled
2015-09-24 13:15:04 29997 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2015-09-24 13:15:04 29997 [Note] InnoDB: Memory barrier is not used
2015-09-24 13:15:04 29997 [Note] InnoDB: Compressed tables use zlib 1.2.3
2015-09-24 13:15:04 29997 [Note] InnoDB: Using Linux native AIO
2015-09-24 13:15:04 29997 [Note] InnoDB: Using CPU crc32 instructions
2015-09-24 13:15:04 29997 [Note] InnoDB: Initializing buffer pool, size = 128.0M
2015-09-24 13:15:04 29997 [Note] InnoDB: Completed initialization of buffer pool
2015-09-24 13:15:04 29997 [Note] InnoDB: Highest supported file format is Barracuda.
2015-09-24 13:15:04 29997 [Note] InnoDB: 128 rollback segment(s) are active.
2015-09-24 13:15:04 29997 [Note] InnoDB: Waiting for purge to start
2015-09-24 13:15:04 29997 [Note] InnoDB: 5.6.25 started; log sequence number 24337684937
2015-09-24 13:15:04 29997 [Note] Server hostname (bind-address): '*'; port: 3306
2015-09-24 13:15:04 29997 [Note] IPv6 is available.
2015-09-24 13:15:04 29997 [Note] - '::' resolves to '::';
2015-09-24 13:15:04 29997 [Note] Server socket created on IP: '::'.
2015-09-24 13:15:04 29997 [Note] Event Scheduler: Loaded 0 events
2015-09-24 13:15:04 29997 [Note] /usr/sbin/mysqld: ready for connections.
Version: '5.6.25' socket: '/var/lib/mysql/mysql.sock' port: 3306 MySQL Community Server (GPL)
我尝试了所有谷歌的解决方案,但结果总是一样的...
MySQL运行在CentOS Linux release 7.1.1503 (Core)上。
谢谢!