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我开发了一个PHP和MySQL web应用程序。最近它显示出放缓的迹象。我在090516上运行了mysql-tuner，正常运行时间为12天。MySQL数据库性能调整
服务器规格如下：
- 的Linux的CentOS 6个
- 48处理器
- 64GB RAM
这里是MySQL调谐器日志输出从090516与12D的正常运行时间：
[email protected] [~/mysqltuner]# perl mysqltuner.pl --outputfile /~/mysqltuner/result_mysqltuner.txt
String found where operator expected at mysqltuner.pl line 3096, near
"get_wsrep_option 'gcache.mem_size'" (#1)
(S syntax) The Perl lexer knows whether to expect a term or an operator.
If it sees what it knows to be a term when it was expecting to see an
operator, it gives you this warning. Usually it indicates that an
operator or delimiter was omitted, such as a semicolon.
(Do you need to predeclare get_wsrep_option?)
Use of implicit split to @_ is deprecated at mysqltuner.pl line 3179 (#2)
(D deprecated, W syntax) It makes a lot of work for the compiler when you
clobber a subroutine's argument list, so it's better if you assign the results
of a split() explicitly to an array (or list).
>> MySQLTuner 1.6.10 - Major Hayden <[email protected]>
>> Bug reports, feature requests, and downloads at http://mysqltuner.com/
>> Run with '--help' for additional options and output filtering
[--] Skipped version check for MySQLTuner script
[OK] Currently running supported MySQL version 5.6.31-log
[OK] Operating on 64-bit architecture
-------- Storage Engine Statistics -----------------------------------------------------------------
[--] Status: +ARCHIVE +BLACKHOLE +CSV -FEDERATED +InnoDB +MEMORY +MRG_MYISAM +MyISAM +PERFORMANCE_SCHEMA
[--] Data in MyISAM tables: 913M (Tables: 11)
[--] Data in InnoDB tables: 12M (Tables: 63)
[!!] Total fragmented tables: 11
-------- Security Recommendations ------------------------------------------------------------------
[OK] There are no anonymous accounts for any database users
[OK] All database users have passwords assigned
[!!] User '[email protected]' has user name as password.
[--] There are 605 basic passwords in the list.
-------- CVE Security Recommendations --------------------------------------------------------------
[OK] NO SECURITY CVE FOUND FOR YOUR VERSION
Argument "gcache.mem_size" isn't numeric in addition (+) at mysqltuner.pl line
1965 (#3)
(W numeric) The indicated string was fed as an argument to an operator
that expected a numeric value instead. If you're fortunate the message
will identify which operator was so unfortunate.
Argument "gcache.mem_size" isn't numeric in addition (+) at mysqltuner.pl line
1972 (#3)
-------- Performance Metrics -----------------------------------------------------------------------
[--] Up for: 12d 6h 21m 24s (2 q [0.000 qps], 1M conn, TX: 192B, RX: 240B)
[--] Reads/Writes: 100%/0%
[--] Binary logging is disabled
[--] Physical Memory : 62.8G
[--] Max MySQL memory : 338.9M
[--] Other process memory: 505.0M
[--] Total buffers: 169.0M global + 1.1M per thread (151 max threads)
[--] P_S Max memory usage: 0B
Argument "*main::get_wsrep_option" isn't numeric in numeric ge (>=) at
mysqltuner.pl line 285 (#3)
Argument "*main::get_wsrep_option" isn't numeric in numeric ge (>=) at
mysqltuner.pl line 288 (#3)
Argument "*main::get_wsrep_option" isn't numeric in numeric ge (>=) at
mysqltuner.pl line 291 (#3)
[--] Galera GCache Max memory usage: *main::get_wsrep_optionB
[OK] Maximum reached memory usage: 340.0M (0.53% of installed RAM)
[OK] Maximum possible memory usage: 338.9M (0.53% of installed RAM)
[OK] Overall possible memory usage with other process is compatible with memory available
[OK] Slow queries: 0% (0/2)
[!!] Highest connection usage: 100% (152/151)
[OK] Aborted connections: 0.00% (34/1098331)
[OK] Query cache is disabled by default due to mutex contention.
[OK] No Sort requiring temporary tables
[OK] No joins without indexes
[OK] No tmp tables created on disk
[OK] Thread cache hit rate: 98% (17K created/1M connections)
[OK] Table cache hit rate: 100% (381 open/0 opened)
[OK] Open file limit used: 2% (228/10K)
[!!] Table locks acquired immediately: 94%
-------- ThreadPool Metrics ------------------------------------------------------------------------
[--] ThreadPool stat is disabled.
-------- Performance schema ------------------------------------------------------------------------
[--] Performance schema is disabled.
[--] Memory used by P_S: 0B
-------- MyISAM Metrics ----------------------------------------------------------------------------
[OK] Key buffer used: 100.0% (8M used/8M cache)
[!!] Key buffer size/total MyISAM indexes: 8.0M/147.7M
[!!] Read Key buffer hit rate: 87.6% (16M cached/1M reads)
[!!] Write Key buffer hit rate: 56.8% (1M cached/777K writes)
-------- AriaDB Metrics ----------------------------------------------------------------------------
[--] AriaDB is disabled.
-------- InnoDB Metrics ----------------------------------------------------------------------------
[--] InnoDB is enabled.
[OK] InnoDB buffer pool/data size: 128.0M/12.1M
[!!] InnoDB buffer pool <= 1G and innodb_buffer_pool_instances(!=1).
[!!] InnoDB Used buffer: 17.82% (1460 used/ 8192 total)
[OK] InnoDB Read buffer efficiency: 100.00% (290756388 hits/ 290757478 total)
[!!] InnoDB Write Log efficiency: 12.12% (3691 hits/ 30446 total)
[OK] InnoDB log waits: 0.00% (0 waits/34137 writes)
-------- TokuDB Metrics ----------------------------------------------------------------------------
[--] TokuDB is disabled.
-------- Galera Metrics ----------------------------------------------------------------------------
[--] Galera is disabled.
-------- Replication Metrics -----------------------------------------------------------------------
[--] Galera Synchronous replication: NO
[--] No replication slave(s) for this server.
[--] This is a standalone server.
-------- Recommendations ---------------------------------------------------------------------------
General recommendations:
Run OPTIMIZE TABLE to defragment tables for better performance
Set up a Secure Password for [email protected] (SET PASSWORD FOR 'user'@'SpecificDNSorIp' = PASSWORD('secure_password');)
Reduce or eliminate persistent connections to reduce connection usage
Optimize queries and/or use InnoDB to reduce lock wait
Variables to adjust:
max_connections (> 151)
wait_timeout (< 28800)
interactive_timeout (< 28800)
key_buffer_size (> 147.7M)
innodb_buffer_pool_instances (=1)
我很少有东西会跳出来，但我不是经验丰富的MySQL DBA，因此我正在从堆栈社区寻求建议。请告知我应该在my.cnf中修改哪些设置，并且如果我需要在PHPMYADMIN中对表进行碎片整理，是否需要在非工作时间内完成。
我没有注意到我的网络应用程序放慢速度，直到最近，最近我做了一次内核更新后重新启动了服务器。目前这篇文章的正常运行时间为19小时。
**额外信息：** Web应用程序有一个用户使用移动设备登录的前端和一个办公室员工管理提交（这是表单）并将它们发送到不同部门的后端。
如果需要，我可以用munin图表更新。我知道服务器严重过度配置（意味着它有更多的RAM和处理器，而不是必要的，但我希望有更多的不足）。我的问题是，我可以简单地调整一些my.cnf设置（如mysqltuner建议的和/或由phpmyadmin建议）以提高效率？
请[编辑]你的问题来解释你的整个应用程序好一点。你的服务器严重超配MySQL。它看起来像数据库客户端软件的连接速率非常高。如果这是一个Web应用程序，请尝试使用连接池并减少处理Web连接的同时进程或线程的数量。 –
感谢您的回复。 Web应用程序有一个前端，用户使用移动设备进行登录，后端则由办公室员工管理提交（表单）并将其发送到不同的部门。如果需要，我可以用munin图表更新。我知道服务器严重过度配置（意味着它有更多的RAM和处理器，而不是必要的，但我希望有更多的不足）。 我的问题是，我可以简单地调整一些my.cnf设置（如mysqltuner建议的和/或由phpmyadmin建议）以提高效率？ – Aaron