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我開發了一個PHP和MySQL web應用程序。最近它顯示出放緩的跡象。我在090516上運行了mysql-tuner，正常運行時間爲12天。MySQL數據庫性能調整
服務器規格如下：
- 的Linux的CentOS 6個
- 48處理器
- 64GB RAM
這裏是MySQL調諧器日誌輸出從090516與12D的正常運行時間：
[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)
我很少有東西會跳出來，但我不是經驗豐富的MySQL DBA，因此我正在從堆棧社區尋求建議。請告知我應該在my.cnf中修改哪些設置，並且如果我需要在PHPMYADMIN中對錶進行碎片整理，是否需要在非工作時間內完成。
我沒有注意到我的網絡應用程序放慢速度，直到最近，最近我做了一次內核更新後重新啓動了服務器。目前這篇文章的正常運行時間爲19小時。
**額外信息：** Web應用程序有一個用戶使用移動設備登錄的前端和一個辦公室員工管理提交（這是表單）並將它們發送到不同部門的後端。
如果需要，我可以用munin圖表更新。我知道服務器嚴重過度配置（意味着它有更多的RAM和處理器，而不是必要的，但我希望有更多的不足）。我的問題是，我可以簡單地調整一些my.cnf設置（如mysqltuner建議的和/或由phpmyadmin建議）以提高效率？
請[編輯]你的問題來解釋你的整個應用程序好一點。你的服務器嚴重超配MySQL。它看起來像數據庫客戶端軟件的連接速率非常高。如果這是一個Web應用程序，請嘗試使用連接池並減少處理Web連接的同時進程或線程的數量。 –
感謝您的回覆。 Web應用程序有一個前端，用戶使用移動設備進行登錄，後端則由辦公室員工管理提交（表單）並將其發送到不同的部門。如果需要，我可以用munin圖表更新。我知道服務器嚴重過度配置（意味着它有更多的RAM和處理器，而不是必要的，但我希望有更多的不足）。 我的問題是，我可以簡單地調整一些my.cnf設置（如mysqltuner建議的和/或由phpmyadmin建議）以提高效率？ – Aaron