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MySQL Optimization per MySQLTuner Report ?

Discussion in 'Workarounds and Optimization' started by cool_recep, Jul 6, 2014.

  1. cool_recep

    cool_recep Member

    Apr 10, 2013
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    this is my MySQLTuner result:

     >>  MySQLTuner 1.3.0 - Major Hayden <>
     >>  Bug reports, feature requests, and downloads at
     >>  Run with '--help' for additional options and output filtering
    [OK] Currently running supported MySQL version 5.6.17
    [OK] Operating on 64-bit architecture
    -------- Storage Engine Statistics -------------------------------------------
    [--] Data in MyISAM tables: 2G (Tables: 410)
    [--] Data in InnoDB tables: 3G (Tables: 322)
    [--] Data in PERFORMANCE_SCHEMA tables: 0B (Tables: 52)
    [--] Data in MEMORY tables: 2M (Tables: 5)
    [!!] Total fragmented tables: 73
    -------- Security Recommendations  -------------------------------------------
    [OK] All database users have passwords assigned
    -------- Performance Metrics -------------------------------------------------
    [--] Up for: 5d 2h 18m 53s (171M q [390.596 qps], 4M conn, TX: 5885B, RX: 50B)
    [--] Reads / Writes: 78% / 22%
    [--] Total buffers: 3.3G global + 513.0M per thread (500 max threads)
    [!!] Maximum possible memory usage: 253.8G (811% of installed RAM)
    [OK] Slow queries: 0% (804/171M)
    [OK] Highest usage of available connections: 60% (302/500)
    [OK] Key buffer size / total MyISAM indexes: 2.0G/625.0M
    [OK] Key buffer hit rate: 100.0% (12B cached / 162K reads)
    [OK] Query cache efficiency: 81.4% (117M cached / 143M selects)
    [!!] Query cache prunes per day: 245242
    [OK] Sorts requiring temporary tables: 0% (10K temp sorts / 12M sorts)
    [!!] Joins performed without indexes: 714848
    [!!] Temporary tables created on disk: 30% (1M on disk / 6M total)
    [OK] Thread cache hit rate: 99% (302 created / 4M connections)
    [OK] Table cache hit rate: 51% (1K open / 3K opened)
    [OK] Open file limit used: 3% (995/32K)
    [OK] Table locks acquired immediately: 99% (48M immediate / 48M locks)
    [!!] InnoDB  buffer pool / data size: 256.0M/4.0G
    [OK] InnoDB log waits: 0
    -------- Recommendations -----------------------------------------------------
    General recommendations:
        Run OPTIMIZE TABLE to defragment tables for better performance
        Reduce your overall MySQL memory footprint for system stability
        Increasing the query_cache size over 128M may reduce performance
        Adjust your join queries to always utilize indexes
        Temporary table size is already large - reduce result set size
        Reduce your SELECT DISTINCT queries without LIMIT clauses
    Variables to adjust:
      *** MySQL's maximum memory usage is dangerously high ***
      *** Add RAM before increasing MySQL buffer variables ***
        query_cache_size (> 512M) [see warning above]
        join_buffer_size (> 512.0M, or always use indexes with joins)
        innodb_buffer_pool_size (>= 3G)
    I don't know how to get the contents of my.cnf. What do you suggest ?
  2. Archmactrix

    Archmactrix Well-Known Member

    Jan 20, 2012
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    You will find it in:
  3. cPanelMichael

    cPanelMichael Forums Analyst
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    Apr 11, 2011
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    Hello :)

    You will need to access SSH as root and use a command such as "cat". EX:

    cat /etc/my.cnf
    Thank you.

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