阿里云 wordpress 博客从移动端访问 mysql 数据库就会挂掉

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这是一个创建于 2861 天前的主题，其中的信息可能已经有所发展或是发生改变。

先说服务器：

阿里云的 centos7x86_64 +nginx+php-fpm+mysql5.6

1GB 内存

博客用的 wordpress

每次从手机浏览器里访问博客完 mysql 就挂了监测了内存占用，发现 mysqld 占用的内存飙升， php-fpm 内存飙升

然后重启 mysql 失败了

service mysqld restart
MySQL server PID file could not be found!                  [FAILED]
Starting MySQL.The server quit without updating PID file (/alidata/server/mysql/data/iZ28o516t2sZ.pid).                                                    [FAILED]

下面是 MySQL 的日志：

2017-01-06 09:45:56 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2017-01-06 09:45:57 16722 [Note] Plugin 'FEDERATED' is disabled.
2017-01-06 09:45:57 16722 [Note] InnoDB: Using atomics to ref count buffer pool pages
2017-01-06 09:45:57 16722 [Note] InnoDB: The InnoDB memory heap is disabled
2017-01-06 09:45:57 16722 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2017-01-06 09:45:57 16722 [Note] InnoDB: Memory barrier is not used
2017-01-06 09:45:57 16722 [Note] InnoDB: Compressed tables use zlib 1.2.3
2017-01-06 09:45:57 16722 [Note] InnoDB: Using Linux native AIO
2017-01-06 09:45:57 16722 [Note] InnoDB: Using CPU crc32 instructions
2017-01-06 09:45:58 16722 [Note] InnoDB: Initializing buffer pool, size = 8.0M
InnoDB: mmap(8585216 bytes) failed; errno 12
2017-01-06 09:45:58 16722 [ERROR] InnoDB: Cannot allocate memory for the buffer pool
2017-01-06 09:45:58 16722 [ERROR] Plugin 'InnoDB' init function returned error.
2017-01-06 09:45:58 16722 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
2017-01-06 09:45:58 16722 [ERROR] Unknown/unsupported storage engine: InnoDB
2017-01-06 09:45:58 16722 [ERROR] Aborting

2017-01-06 09:45:58 16722 [Note] Binlog end
2017-01-06 09:45:58 16722 [Note] Shutting down plugin 'partition'
2017-01-06 09:45:58 16722 [Note] Shutting down plugin 'PERFORMANCE_SCHEMA'
2017-01-06 09:45:58 16722 [Note] Shutting down plugin 'BLACKHOLE'
2017-01-06 09:45:58 16722 [Note] Shutting down plugin 'INNODB_SYS_DATAFILES'
2017-01-06 09:45:58 16722 [Note] Shutting down plugin 'INNODB_SYS_TABLESPACES'
2017-01-06 09:45:58 16722 [Note] Shutting down plugin 'INNODB_SYS_FOREIGN_COLS'
2017-01-06 09:45:58 16722 [Note] Shutting down plugin 'INNODB_SYS_FOREIGN'
2017-01-06 09:45:58 16722 [Note] Shutting down plugin 'INNODB_SYS_FIELDS'
2017-01-06 09:45:58 16722 [Note] Shutting down plugin 'INNODB_SYS_COLUMNS'
2017-01-06 09:45:58 16722 [Note] Shutting down plugin 'INNODB_SYS_INDEXES'
2017-01-06 09:45:58 16722 [Note] Shutting down plugin 'INNODB_SYS_TABLESTATS'
2017-01-06 09:45:58 16722 [Note] Shutting down plugin 'INNODB_SYS_TABLES'
2017-01-06 09:45:58 16722 [Note] Shutting down plugin 'INNODB_FT_INDEX_TABLE'
2017-01-06 09:45:58 16722 [Note] Shutting down plugin 'INNODB_FT_INDEX_CACHE'
2017-01-06 09:45:58 16722 [Note] Shutting down plugin 'INNODB_FT_CONFIG'
2017-01-06 09:45:58 16722 [Note] Shutting down plugin 'INNODB_FT_BEING_DELETED'
2017-01-06 09:45:58 16722 [Note] Shutting down plugin 'INNODB_FT_DELETED'
2017-01-06 09:45:58 16722 [Note] Shutting down plugin 'INNODB_FT_DEFAULT_STOPWORD'
2017-01-06 09:45:58 16722 [Note] Shutting down plugin 'INNODB_METRICS'
2017-01-06 09:45:58 16722 [Note] Shutting down plugin 'INNODB_BUFFER_POOL_STATS'
2017-01-06 09:45:58 16722 [Note] Shutting down plugin 'INNODB_BUFFER_PAGE_LRU'
2017-01-06 09:45:58 16722 [Note] Shutting down plugin 'INNODB_BUFFER_PAGE'
2017-01-06 09:45:58 16722 [Note] Shutting down plugin 'INNODB_CMP_PER_INDEX_RESET'
2017-01-06 09:45:58 16722 [Note] Shutting down plugin 'INNODB_CMP_PER_INDEX'
2017-01-06 09:45:58 16722 [Note] Shutting down plugin 'INNODB_CMPMEM_RESET'
2017-01-06 09:45:58 16722 [Note] Shutting down plugin 'INNODB_CMPMEM'
2017-01-06 09:45:58 16722 [Note] Shutting down plugin 'INNODB_CMP_RESET'
2017-01-06 09:45:58 16722 [Note] Shutting down plugin 'INNODB_CMP'
2017-01-06 09:45:58 16722 [Note] Shutting down plugin 'INNODB_LOCK_WAITS'
2017-01-06 09:45:58 16722 [Note] Shutting down plugin 'INNODB_LOCKS'
2017-01-06 09:45:58 16722 [Note] Shutting down plugin 'INNODB_TRX'
2017-01-06 09:45:58 16722 [Note] Shutting down plugin 'ARCHIVE'
2017-01-06 09:45:58 16722 [Note] Shutting down plugin 'MyISAM'
2017-01-06 09:45:58 16722 [Note] Shutting down plugin 'CSV'
2017-01-06 09:45:58 16722 [Note] Shutting down plugin 'MRG_MYISAM'
2017-01-06 09:45:58 16722 [Note] Shutting down plugin 'MEMORY'
2017-01-06 09:45:58 16722 [Note] Shutting down plugin 'sha256_password'
2017-01-06 09:45:58 16722 [Note] Shutting down plugin 'mysql_old_password'
2017-01-06 09:45:58 16722 [Note] Shutting down plugin 'mysql_native_password'
2017-01-06 09:45:58 16722 [Note] Shutting down plugin 'binlog'
2017-01-06 09:45:58 16722 [Note] /alidata/server/mysql/bin/mysqld: Shutdown complete

170106 09:45:58 mysqld_safe mysqld from pid file /alidata/server/mysql/data/iZ28o516t2sZ.pid ended
170106 09:46:45 mysqld_safe Starting mysqld daemon with databases from /alidata/server/mysql/data
2017-01-06 09:46:45 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2017-01-06 09:46:46 17067 [Note] Plugin 'FEDERATED' is disabled.
2017-01-06 09:46:46 17067 [Note] InnoDB: Using atomics to ref count buffer pool pages
2017-01-06 09:46:46 17067 [Note] InnoDB: The InnoDB memory heap is disabled
2017-01-06 09:46:46 17067 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2017-01-06 09:46:46 17067 [Note] InnoDB: Memory barrier is not used
2017-01-06 09:46:46 17067 [Note] InnoDB: Compressed tables use zlib 1.2.3
2017-01-06 09:46:46 17067 [Note] InnoDB: Using Linux native AIO
2017-01-06 09:46:46 17067 [Note] InnoDB: Using CPU crc32 instructions
2017-01-06 09:46:46 17067 [Note] InnoDB: Initializing buffer pool, size = 8.0M
2017-01-06 09:46:46 17067 [Note] InnoDB: Completed initialization of buffer pool
InnoDB: Error: pthread_create returned 11
170106 09:46:46 mysqld_safe mysqld from pid file /alidata/server/mysql/data/iZ28o516t2sZ.pid ended

是 php-fpm 的问题？还是 MySQL5.6 的问题要怎么解决啊！求大神

第 1 条附言 · 2017-01-06 14:06:17 +08:00

mysql配置文件

[client]
port            = 3306
socket          = /tmp/mysql.sock
[mysqld]
port            = 3306
socket          = /tmp/mysql.sock
skip-external-locking
log-error=/alidata/log/mysql/error1.log
#datadir=/alidata/server/mysql/data
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
innodb_buffer_pool_size=8M

log-bin=mysql-bin
binlog_format=mixed
server-id       = 1

sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES

[mysqldump]
quick
max_allowed_packet = 16M

[mysql]
no-auto-rehash

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

[mysqlhotcopy]
interactive-timeout
expire_logs_days = 5
max_binlog_size = 1000M

第 2 条附言 · 2017-01-06 15:05:42 +08:00

刚刚参考阿里云社区设置了 swap 分区，不知道会不会解决，暂时运行着看看吧，要是再挂掉，就换 Apache+mysql5.7 试试

https://help.aliyun.com/knowledge_detail/42534.html

7 条回复 • 2017-01-07 09:28:02 +08:00

KenYang

2017-01-06 12:10:04 +08:00 via iPhone

出现了同样的问题现在只能每次手动重启

alect

2017-01-06 12:14:40 +08:00

Cannot allocate memory for the buffer pool
内存不够用么

lzhd24

2017-01-06 12:31:40 +08:00 via Android

嗯，我也遇到过好多次， wordpress+mysql 配置，访问过多就会挂，阿里云论坛好像有解决办法。你可以搜搜

cevincheung

2017-01-06 12:35:43 +08:00

内存不够用。阿里云是不是没有 swap

abc123ccc

2017-01-06 13:58:54 +08:00

可能配置也有点问题吧，贴上你的 mysql 的配置文件信息。

icedream728

2017-01-07 08:24:19 +08:00

装 mysqltuner 看看 mysql 是不是要优化

abc123ccc

2017-01-07 09:28:02 +08:00

InnoDB: The InnoDB memory heap is disabled
2017-01-06 09:45:57 16722 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2017-01-06 09:45:57 16722 [Note] InnoDB: Memory barrier is not used
2017-01-06 09:45:57 16722 [Note] InnoDB: Compressed tables use zlib 1.2.3
2017-01-06 09:45:57 16722 [Note] InnoDB: Using Linux native AIO
2017-01-06 09:45:57 16722 [Note] InnoDB: Using CPU crc32 instructions
2017-01-06 09:45:58 16722 [Note] InnoDB: Initializing buffer pool, size = 8.0M
InnoDB: mmap(8585216 bytes) failed; errno 12

看这里：
The InnoDB memory heap is disabled
InnoDB: Memory barrier is not used
InnoDB: Initializing buffer pool, size = 8.0M
InnoDB: mmap(8585216 bytes) failed; errno 12

到这里就挂了，而且你的配置里似乎没有 innodb 的配置， myisam 的也好少。还有你的 bin-log 日志，如果没有什么用，可以关掉。

最好不要装高版本的 mysql ，除非你的内存大。好像 mysql5.6 及以上版本默认占内存好大。