WordPress建立数据库连接时出错

a172606220

最近出现的频率很高，几乎每天都得手动重启好几次。
下面是重启的时候的日志：一天出现了很多次，每次都是重启之后可以，但是过几个小时就又会出现建立数据库连接时出错。请军哥解答一下，我的是LNMPA1.3版本。
[mpm_prefork:notice] [pid 21648] AH00169: caught SIGTERM, shutting down
[Sun Mar 12 22:20:41.788234 2017] [ssl:warn] [pid 23025] AH01873: Init: Session Cache is not configured [hint: SSLSessionCache]
[Sun Mar 12 22:20:41.788374 2017] [lbmethod_heartbeat:notice] [pid 23025] AH02282: No slotmem from mod_heartmonitor
[Sun Mar 12 22:20:41.978186 2017] [mpm_prefork:notice] [pid 23025] AH00163: Apache/2.4.20 (Unix) OpenSSL/1.0.2g PHP/5.6.22 configured -- resuming normal operations
[Sun Mar 12 22:20:41.979244 2017] [core:notice] [pid 23025] AH00094: Command line: '/usr/local/apache/bin/httpd'
[Sun Mar 12 22:22:07.008429 2017] [mpm_prefork:notice] [pid 23025] AH00169: caught SIGTERM, shutting down
[Sun Mar 12 22:22:59.571348 2017] [ssl:warn] [pid 679] AH01873: Init: Session Cache is not configured [hint: SSLSessionCache]
[Sun Mar 12 22:22:59.592908 2017] [lbmethod_heartbeat:notice] [pid 679] AH02282: No slotmem from mod_heartmonitor
[Sun Mar 12 22:23:00.070161 2017] [mpm_prefork:notice] [pid 679] AH00163: Apache/2.4.20 (Unix) OpenSSL/1.0.2g PHP/5.6.22 configured -- resuming normal operations
[Sun Mar 12 22:23:00.070232 2017] [core:notice] [pid 679] AH00094: Command line: '/usr/local/apache/bin/httpd'

licess

数据库连接错误一般是数据库出现问题，要看数据库的日志，不清楚日志位置可以看置顶帖反馈必读

a172606220

Killed
170313 00:15:34 mysqld_safe Number of processes running now: 0
170313 00:15:40 mysqld_safe mysqld restarted
170313  0:16:05 [Note] /usr/local/mysql/bin/mysqld (mysqld 5.5.48-log) starting as process 1936 ...
170313  0:16:42 [Note] Plugin 'FEDERATED' is disabled.
170313  0:16:43 InnoDB: The InnoDB memory heap is disabled
170313  0:16:43 InnoDB: Mutexes and rw_locks use GCC atomic builtins
170313  0:16:43 InnoDB: Compressed tables use zlib 1.2.8
170313  0:16:43 InnoDB: Initializing buffer pool, size = 16.0M
170313  0:16:43 InnoDB: Completed initialization of buffer pool
170313  0:16:43 InnoDB: highest supported file format is Barracuda.
InnoDB: The log sequence number in ibdata files does not match
InnoDB: the log sequence number in the ib_logfiles!
170313  0:16:43  InnoDB: Database was not shut down normally!
InnoDB: Starting crash recovery.
InnoDB: Reading tablespace information from the .ibd files...
InnoDB: Restoring possible half-written data pages from the doublewrite
InnoDB: buffer...
InnoDB: Last MySQL binlog file position 0 15230, file name ./mysql-bin.000062
170313  0:16:44  InnoDB: Waiting for the background threads to start
170313  0:16:45 InnoDB: 5.5.48 started; log sequence number 73326279
170313  0:16:45 [Note] Recovering after a crash using mysql-bin
170313  0:16:45 [Note] Starting crash recovery...
170313  0:16:45 [Note] Crash recovery finished.
170313  0:16:45 [Note] Server hostname (bind-address): '0.0.0.0'; port: 3306
170313  0:16:45 [Note]   - '0.0.0.0' resolves to '0.0.0.0';
170313  0:16:45 [Note] Server socket created on IP: '0.0.0.0'.
170313  0:16:45 [Note] Event Scheduler: Loaded 0 events
170313  0:16:45 [Note] /usr/local/mysql/bin/mysqld: ready for connections.
Version: '5.5.48-log'  socket: '/tmp/mysql.sock'  port: 3306  Source distribution

麻烦军哥帮忙看看，谢谢。

a172606220

上面是凌晨的错误日志，下面是最近一次的错误日志：麻烦军哥指导下，谢谢。
Killed
170313 15:34:27 mysqld_safe mysqld from pid file /usr/local/mysql/var/iZjn05sb311p5fZ.pid ended
170313 16:51:23 mysqld_safe Starting mysqld daemon with databases from /usr/local/mysql/var
170313 16:51:23 [Note] /usr/local/mysql/bin/mysqld (mysqld 5.5.48-log) starting as process 4525 ...
170313 16:51:23 [Note] Plugin 'FEDERATED' is disabled.
170313 16:51:23 InnoDB: The InnoDB memory heap is disabled
170313 16:51:23 InnoDB: Mutexes and rw_locks use GCC atomic builtins
170313 16:51:23 InnoDB: Compressed tables use zlib 1.2.8
170313 16:51:23 InnoDB: Initializing buffer pool, size = 16.0M
170313 16:51:23 InnoDB: Completed initialization of buffer pool
170313 16:51:23 InnoDB: highest supported file format is Barracuda.
InnoDB: The log sequence number in ibdata files does not match
InnoDB: the log sequence number in the ib_logfiles!
170313 16:51:24  InnoDB: Database was not shut down normally!
InnoDB: Starting crash recovery.
InnoDB: Reading tablespace information from the .ibd files...
InnoDB: Restoring possible half-written data pages from the doublewrite
InnoDB: buffer...
InnoDB: Last MySQL binlog file position 0 22388, file name ./mysql-bin.000081
170313 16:51:24  InnoDB: Waiting for the background threads to start
170313 16:51:25 InnoDB: 5.5.48 started; log sequence number 74572467
170313 16:51:25 [Note] Recovering after a crash using mysql-bin
170313 16:51:25 [Note] Starting crash recovery...
170313 16:51:25 [Note] Crash recovery finished.
170313 16:51:26 [Note] Server hostname (bind-address): '0.0.0.0'; port: 3306
170313 16:51:26 [Note]   - '0.0.0.0' resolves to '0.0.0.0';
170313 16:51:26 [Note] Server socket created on IP: '0.0.0.0'.
170313 16:51:26 [Note] Event Scheduler: Loaded 0 events
170313 16:51:26 [Note] /usr/local/mysql/bin/mysqld: ready for connections.
Version: '5.5.48-log'  socket: '/tmp/mysql.sock'  port: 3306  Source distribution

licess

Killed就是被kill了，就是内存不足导致的

a172606220

好的，谢谢军哥，感觉没用多少内存，阿里云服务器。请求也不是太多，老是突然连接错误。。