Meningkatkan Performa MySQL/MariaDB Dengan MySQLTuner

MySQLTuner adalah sebuah script Perl yang akan menganalisa performa database MySQL/MariaDB, dan dari hasil analisa tersebut, MySQLTuner akan memberikan rekomendasi variabel mana saja yang harus dinaikkan atau diturunkan, guna menaikkan performa. Dengan begitu, kita dapat melakukan “tuning” file my.cnf agar performa server database MySQL/MariaDB lebih optimal dan bekerja lebih efisien.

Pertama-tama kita download dulu file MySQLTuner nya dengan perintah:

wget https://raw.github.com/rackerhacker/MySQLTuner-perl/master/mysqltuner.pl

Kemudian kita chmod dulu agar bisa dijalankan:

chmod +x mysqltuner.pl

Lalu kita jalankan MySQLTuner dengan perintah:

./mysqltuner.pl

NOTE: anda harus login sebagai root untuk menjalankan perintah diatas.

Output dari perintah diatas contohnya seperti berikut:

server1:~# ./mysqltuner.pl

 >>  MySQLTuner 0.9.8 - Major Hayden 
 >>  Bug reports, feature requests, and downloads at http://mysqltuner.com/
 >>  Run with '--help' for additional options and output filtering
Please enter your MySQL administrative login: <-- root
Please enter your MySQL administrative password: <-- yourrootsqlpassword

-------- General Statistics --------------------------------------------------
[--] Skipped version check for MySQLTuner script
[!!] Your MySQL version 4.1.11-Debian_etch1-log is EOL software!  Upgrade soon!
[OK] Operating on 32-bit architecture with less than 2GB RAM

-------- Storage Engine Statistics -------------------------------------------
[--] Status: +Archive -BDB -Federated +InnoDB +ISAM -NDBCluster
[--] Data in MyISAM tables: 301M (Tables: 2074)
[--] Data in HEAP tables: 379K (Tables: 9)
[!!] InnoDB is enabled but isn't being used
[!!] ISAM is enabled but isn't being used
[!!] Total fragmented tables: 215

-------- Performance Metrics -------------------------------------------------
[--] Up for: 12d 18h 33m 30s (1B q [1K qps], 185K conn, TX: 3B, RX: 377M)
[--] Reads / Writes: 78% / 22%
[--] Total buffers: 2.6M per thread and 58.0M global
[OK] Maximum possible memory usage: 320.5M (20% of installed RAM)
[OK] Slow queries: 0% (17/1B)
[OK] Highest usage of available connections: 32% (32/100)
[OK] Key buffer size / total MyISAM indexes: 16.0M/72.3M
[OK] Key buffer hit rate: 99.9%
[OK] Query cache efficiency: 99.9%
[!!] Query cache prunes per day: 47549
[OK] Sorts requiring temporary tables: 0%
[!!] Temporary tables created on disk: 28%
[OK] Thread cache hit rate: 99%
[!!] Table cache hit rate: 0%
[OK] Open file limit used: 12%
[OK] Table locks acquired immediately: 99%
[!!] Connections aborted: 20%

-------- Recommendations -----------------------------------------------------
General recommendations:
    Add skip-innodb to MySQL configuration to disable InnoDB
    Add skip-isam to MySQL configuration to disable ISAM
    Run OPTIMIZE TABLE to defragment tables for better performance
    Enable the slow query log to troubleshoot bad queries
    When making adjustments, make tmp_table_size/max_heap_table_size equal
    Reduce your SELECT DISTINCT queries without LIMIT clauses
    Increase table_cache gradually to avoid file descriptor limits
    Your applications are not closing MySQL connections properly
Variables to adjust:
    query_cache_size (> 16M)
    tmp_table_size (> 32M)
    max_heap_table_size (> 16M)
    table_cache (> 64)

server1:~#

Lihat bagian bawah output yang bertuliskan “Recommendations“, dimana inilah rekomendasi dan variabel yang harus anda ubah guna meningkatkan performa MySQL/MariaDB.

Buka file my.cnf di lokasi /etc/mysql/my.cnf dan ubah variabel sesuai rekomendasi. Setelah selesai restart MySQL/MariaDB dengan perintah

service mysql restart

Cek secara periodik performa MySQL/MariaDB dengan MySQLTuner, minimal 24 jam sekali anda jalankan script ini.

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