Dumping buffer pool(s) to /var/lib/mysql/ib_buffer_pool
时间: 2023-10-10 11:15:29 浏览: 399
这是 MySQL 数据库系统的一条日志信息,它表示正在将缓冲池中的数据转储到指定的文件路径 /var/lib/mysql/ib_buffer_pool 中。缓冲池是 MySQL 中用于缓存热数据的内存池,当数据被频繁访问时,MySQL 会将其加载到缓冲池中,以提高读取速度。在 MySQL 关闭时,为了保证数据的一致性,缓冲池中的数据需要被转储到磁盘上的文件中。这也是这条日志信息出现的原因。
相关问题
Lost connection to MySQL server during query when dumping table
这个错误通常是由于超时或MySQL服务中断引起的。以下是一些可能的解决方案:
1. 增加超时时间:可以尝试增加超时时间。在 MySQL 命令行中,可以使用以下命令设置超时时间:
```
SET GLOBAL connect_timeout=28800;
SET GLOBAL wait_timeout=28800;
SET GLOBAL interactive_timeout=28800;
```
这将把超时时间增加到 8 小时。如果您使用的是 MySQL 客户端工具,通常可以在设置中更改超时时间。
2. 增加 MySQL 缓冲区:在 MySQL 配置文件中,可以增加 MySQL 缓冲区的大小。这可以通过在 my.cnf 文件(或 my.ini 文件)中增加以下行来实现:
```
[mysqld]
max_allowed_packet=64M
```
这将把缓冲区大小增加到 64MB。您可以根据需要调整此值。
3. 优化查询:如果查询非常复杂或涉及大量数据,则可能会导致超时。您可以优化查询以减少查询时间。
4. 检查 MySQL 日志:如果 MySQL 日志中存在错误消息,则可能会提供有关问题的更多信息。检查 MySQL 日志以获得更多详细信息。
如果上述解决方案都无法解决问题,您可能需要考虑重新启动 MySQL 服务或联系技术支持以获取更多帮助。
[root@QAQ ~]# sudo tail -n 50 /var/log/mysql/error.log 2023-07-14T02:45:21.370949Z 0 [Note] Shutting down plugin 'partition' 2023-07-14T02:45:21.370952Z 0 [Note] Shutting down plugin 'BLACKHOLE' 2023-07-14T02:45:21.370954Z 0 [Note] Shutting down plugin 'ARCHIVE' 2023-07-14T02:45:21.370956Z 0 [Note] Shutting down plugin 'PERFORMANCE_SCHEMA' 2023-07-14T02:45:21.370993Z 0 [Note] Shutting down plugin 'MRG_MYISAM' 2023-07-14T02:45:21.370995Z 0 [Note] Shutting down plugin 'MyISAM' 2023-07-14T02:45:21.371003Z 0 [Note] Shutting down plugin 'INNODB_SYS_VIRTUAL' 2023-07-14T02:45:21.371011Z 0 [Note] Shutting down plugin 'INNODB_SYS_DATAFILES' 2023-07-14T02:45:21.371013Z 0 [Note] Shutting down plugin 'INNODB_SYS_TABLESPACES' 2023-07-14T02:45:21.371015Z 0 [Note] Shutting down plugin 'INNODB_SYS_FOREIGN_COLS' 2023-07-14T02:45:21.371017Z 0 [Note] Shutting down plugin 'INNODB_SYS_FOREIGN' 2023-07-14T02:45:21.371018Z 0 [Note] Shutting down plugin 'INNODB_SYS_FIELDS' 2023-07-14T02:45:21.371020Z 0 [Note] Shutting down plugin 'INNODB_SYS_COLUMNS' 2023-07-14T02:45:21.371022Z 0 [Note] Shutting down plugin 'INNODB_SYS_INDEXES' 2023-07-14T02:45:21.371024Z 0 [Note] Shutting down plugin 'INNODB_SYS_TABLESTATS' 2023-07-14T02:45:21.371026Z 0 [Note] Shutting down plugin 'INNODB_SYS_TABLES' 2023-07-14T02:45:21.371028Z 0 [Note] Shutting down plugin 'INNODB_FT_INDEX_TABLE' 2023-07-14T02:45:21.371030Z 0 [Note] Shutting down plugin 'INNODB_FT_INDEX_CACHE' 2023-07-14T02:45:21.371032Z 0 [Note] Shutting down plugin 'INNODB_FT_CONFIG' 2023-07-14T02:45:21.371033Z 0 [Note] Shutting down plugin 'INNODB_FT_BEING_DELETED' 2023-07-14T02:45:21.371035Z 0 [Note] Shutting down plugin 'INNODB_FT_DELETED' 2023-07-14T02:45:21.371037Z 0 [Note] Shutting down plugin 'INNODB_FT_DEFAULT_STOPWORD' 2023-07-14T02:45:21.371039Z 0 [Note] Shutting down plugin 'INNODB_METRICS' 2023-07-14T02:45:21.371041Z 0 [Note] Shutting down plugin 'INNODB_TEMP_TABLE_INFO' 2023-07-14T02:45:21.371043Z 0 [Note] Shutting down plugin 'INNODB_BUFFER_POOL_STATS' 2023-07-14T02:45:21.371045Z 0 [Note] Shutting down plugin 'INNODB_BUFFER_PAGE_LRU' 2023-07-14T02:45:21.371047Z 0 [Note] Shutting down plugin 'INNODB_BUFFER_PAGE' 2023-07-14T02:45:21.371049Z 0 [Note] Shutting down plugin 'INNODB_CMP_PER_INDEX_RESET' 2023-07-14T02:45:21.371050Z 0 [Note] Shutting down plugin 'INNODB_CMP_PER_INDEX' 2023-07-14T02:45:21.371052Z 0 [Note] Shutting down plugin 'INNODB_CMPMEM_RESET' 2023-07-14T02:45:21.371054Z 0 [Note] Shutting down plugin 'INNODB_CMPMEM' 2023-07-14T02:45:21.371056Z 0 [Note] Shutting down plugin 'INNODB_CMP_RESET' 2023-07-14T02:45:21.371058Z 0 [Note] Shutting down plugin 'INNODB_CMP' 2023-07-14T02:45:21.371060Z 0 [Note] Shutting down plugin 'INNODB_LOCK_WAITS' 2023-07-14T02:45:21.371062Z 0 [Note] Shutting down plugin 'INNODB_LOCKS' 2023-07-14T02:45:21.371064Z 0 [Note] Shutting down plugin 'INNODB_TRX' 2023-07-14T02:45:21.371066Z 0 [Note] Shutting down plugin 'InnoDB' 2023-07-14T02:45:21.371100Z 0 [Note] InnoDB: FTS optimize thread exiting. 2023-07-14T02:45:21.371135Z 0 [Note] InnoDB: Starting shutdown... 2023-07-14T02:45:21.471280Z 0 [Note] InnoDB: Dumping buffer pool(s) to /www/server/data/ib_buffer_pool 2023-07-14T02:45:21.471421Z 0 [Note] InnoDB: Buffer pool(s) dump completed at 230714 10:45:21 2023-07-14T02:45:22.992635Z 0 [Note] InnoDB: Shutdown completed; log sequence number 2767468 2023-07-14T02:45:22.993964Z 0 [Note] InnoDB: Removed temporary tablespace data file: "ibtmp1" 2023-07-14T02:45:22.993980Z 0 [Note] Shutting down plugin 'MEMORY' 2023-07-14T02:45:22.993985Z 0 [Note] Shutting down plugin 'CSV' 2023-07-14T02:45:22.993989Z 0 [Note] Shutting down plugin 'sha256_password' 2023-07-14T02:45:22.993991Z 0 [Note] Shutting down plugin 'mysql_native_password' 2023-07-14T02:45:22.994103Z 0 [Note] Shutting down plugin 'binlog' 2023-07-14T02:45:22.994915Z 0 [Note] /www/server/mysql/bin/mysqld: Shutdown complete
根据您提供的最新错误日志,MySQL 在关闭过程中没有显示任何明显的错误。这表明 MySQL 进程正常关闭。
为了进一步排除问题,我建议您执行以下步骤:
1. 检查 MySQL 进程是否已完全终止。您可以使用以下命令检查:
```
ps aux | grep mysql
```
确保没有任何与 MySQL 相关的进程正在运行。
2. 尝试手动启动 MySQL 服务,并查看是否有任何错误消息。使用以下命令启动服务:
```
sudo systemctl start mysqld
```
3. 如果手动启动 MySQL 服务时出现错误,请检查 `/var/log/mysql/error.log` 中的最新错误日志,以获取详细的错误信息。您可以使用以下命令查看最新的错误日志:
```
sudo tail -n 50 /var/log/mysql/error.log
```
如果问题仍然存在,请提供最新的日志信息和任何其他相关配置文件的内容,以便我能够更好地帮助您解决问题。