MySQL 因未解决的内存问题而崩溃

Question

我的网站 (Wordpress) 有时停止工作并显示消息“无法连接到 Datatabse”。

我检查了 MySQL 的日志文件，发现以下崩溃信息：

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2021-01-21  0:44:59 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2021-01-21  0:44:59 0 [Note] InnoDB: Uses event mutexes
2021-01-21  0:44:59 0 [Note] InnoDB: Compressed tables use zlib 1.2.11
2021-01-21  0:44:59 0 [Note] InnoDB: Number of pools: 1
2021-01-21  0:45:00 0 [Note] InnoDB: Using SSE2 crc32 instructions
2021-01-21  0:45:00 0 [Note] InnoDB: Initializing buffer pool, total size = 16M, instances = 1, chunk size = 16M
2021-01-21  0:45:00 0 [Note] InnoDB: Completed initialization of buffer pool
2021-01-21  0:45:00 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().
2021-01-21  0:45:00 0 [Note] InnoDB: Starting crash recovery from checkpoint LSN=215993122
2021-01-21  0:45:07 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2021-01-21  0:45:07 0 [Note] InnoDB: Uses event mutexes
2021-01-21  0:45:07 0 [Note] InnoDB: Compressed tables use zlib 1.2.11
2021-01-21  0:45:07 0 [Note] InnoDB: Number of pools: 1
2021-01-21  0:45:07 0 [Note] InnoDB: Using SSE2 crc32 instructions
2021-01-21  0:45:07 0 [Note] InnoDB: Initializing buffer pool, total size = 16M, instances = 1, chunk size = 16M
2021-01-21  0:45:07 0 [Note] InnoDB: Completed initialization of buffer pool
2021-01-21  0:45:07 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().
2021-01-21  0:45:07 0 [Note] InnoDB: Starting crash recovery from checkpoint LSN=215993122
2021-01-21  0:50:02 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2021-01-21  0:50:02 0 [Note] InnoDB: Uses event mutexes
2021-01-21  0:50:02 0 [Note] InnoDB: Compressed tables use zlib 1.2.11
2021-01-21  0:50:02 0 [Note] InnoDB: Number of pools: 1
2021-01-21  0:50:02 0 [Note] InnoDB: Using SSE2 crc32 instructions
2021-01-21  0:50:02 0 [Note] InnoDB: Initializing buffer pool, total size = 16M, instances = 1, chunk size = 16M
2021-01-21  0:50:02 0 [Note] InnoDB: Completed initialization of buffer pool
2021-01-21  0:50:02 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().
2021-01-21  0:50:02 0 [Note] InnoDB: Starting crash recovery from checkpoint LSN=215993122
2021-01-21  0:50:02 0 [Note] InnoDB: 128 out of 128 rollback segments are active.
2021-01-21  0:50:02 0 [Note] InnoDB: Removed temporary tablespace data file: "ibtmp1"
2021-01-21  0:50:02 0 [Note] InnoDB: Creating shared tablespace for temporary tables
2021-01-21  0:50:02 0 [Note] InnoDB: Setting file '/opt/lampp/var/mysql/ibtmp1' size to 12 MB. Physically writing the file full; Please wait ...
2021-01-21  0:50:02 0 [Note] InnoDB: File '/opt/lampp/var/mysql/ibtmp1' size is now 12 MB.
2021-01-21  0:50:02 0 [Note] InnoDB: Waiting for purge to start
2021-01-21  0:50:02 0 [Note] InnoDB: 10.4.11 started; log sequence number 215993131; transaction id 221150
2021-01-21  0:50:02 0 [Note] Plugin 'FEEDBACK' is disabled.
2021-01-21  0:50:02 0 [Note] InnoDB: Loading buffer pool(s) from /opt/lampp/var/mysql/ib_buffer_pool
2021-01-21  0:50:02 0 [Note] Server socket created on IP: '::'.
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我重新启动了 MySQL，我的网站运行良好。我的MySQL的版本是：Distrib 10.4.11-MariaDB, for Linux (x86_64) Ubuntu 版本 20.

这种情况在上个月出现过几次。

之前在一些帖子里搜索过解决方法

我已经尝试过这种配置：

max_connections = 100  
key_buffer = 50M
max_allowed_packet = 10M
thread_stack = 128K
table_cache = 50

但它仍然下降。

这是我已经找到的关于我的问题的一个来源： MySQL keeps crashing

有没有人遇到同样的问题，并且知道解决办法？

Answer 1

我在

解决了这个问题

https://serverfault.com/questions/1051060/my-mysql-crashed-many-times-in-a-month/1051369#1051369

然后我会关闭这个问题，非常感谢支持我！

MySQL 因未解决的内存问题而崩溃

MySQL crashed with un-answered memory issue

mysql

wordpress

ubuntu

crash

mariadb-10.4