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Help with MySQLTuner on E3-1240 / 24GB

Discussion in 'Workarounds and Optimization' started by tone, May 23, 2013.

  1. tone

    tone Member

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    Server Specifications:

    Xeon E3-1240
    24GB DDR3
    2x2TB RAID 1
    1Gbps unmetered

    I'm not entirely sure, and not at all knowledgeable, about mysql optimisation - I was hoping someone on here might be able to tell me the best my.cnf to set.

    Here are the results from MySQLTuner

    Code:
     >>  MySQLTuner 1.2.0_1 - Major Hayden <major@mhtx.net>
     >>  Bug reports, feature requests, and downloads at http://mysqltuner.com/
     >>  Run with '--help' for additional options and output filtering
    
    -------- General Statistics --------------------------------------------------
    [--] Skipped version check for MySQLTuner script
    [OK] Currently running supported MySQL version 5.5.31-cll
    [OK] Operating on 64-bit architecture
    
    -------- Storage Engine Statistics -------------------------------------------
    [--] Status: +Archive -BDB -Federated +InnoDB -ISAM -NDBCluster
    [--] Data in MyISAM tables: 194M (Tables: 984)
    [--] Data in InnoDB tables: 780M (Tables: 1528)
    [--] Data in PERFORMANCE_SCHEMA tables: 0B (Tables: 17)
    [--] Data in MEMORY tables: 372K (Tables: 24)
    [!!] Total fragmented tables: 127
    
    -------- Performance Metrics -------------------------------------------------
    [--] Up for: 5m 29s (6K q [18.745 qps], 418 conn, TX: 314M, RX: 2M)
    [--] Reads / Writes: 84% / 16%
    [--] Total buffers: 3.0G global + 2.8M per thread (5000 max threads)
    [OK] Maximum possible memory usage: 16.4G (70% of installed RAM)
    [OK] Slow queries: 0% (0/6K)
    [OK] Highest usage of available connections: 0% (5/5000)
    [OK] Key buffer size / total MyISAM indexes: 1.0G/53.7M
    [OK] Key buffer hit rate: 99.5% (165K cached / 839 reads)
    [!!] Query cache is disabled
    [OK] Sorts requiring temporary tables: 0% (0 temp sorts / 1K sorts)
    [!!] Joins performed without indexes: 52
    [!!] Temporary tables created on disk: 47% (331 on disk / 697 total)
    [!!] Thread cache is disabled
    [OK] Table cache hit rate: 96% (172 open / 179 opened)
    [OK] Open file limit used: 0% (82/25K)
    [OK] Table locks acquired immediately: 100% (7K immediate / 7K locks)
    [OK] InnoDB data size / buffer pool: 780.3M/2.0G
    
    -------- Recommendations -----------------------------------------------------
    General recommendations:
        Run OPTIMIZE TABLE to defragment tables for better performance
        MySQL started within last 24 hours - recommendations may be inaccurate
        Enable the slow query log to troubleshoot bad queries
        Adjust your join queries to always utilize indexes
        When making adjustments, make tmp_table_size/max_heap_table_size equal
        Reduce your SELECT DISTINCT queries without LIMIT clauses
        Set thread_cache_size to 4 as a starting value
    Variables to adjust:
        query_cache_size (>= 8M)
        join_buffer_size (> 128.0K, or always use indexes with joins)
        tmp_table_size (> 16M)
        max_heap_table_size (> 16M)
        thread_cache_size (start at 4)
    
    
    And here is my current my.cnf

    Code:
    [mysqld]
    local-infile=0
    innodb_file_per_table=1
    default-storage-engine=MyISAM
    key_buffer_size=1024M
    max_connections=5000
    innodb_buffer_pool_size=2028M
    
    Appreciate anyone who takes the time to look and advise, thank you.
     
  2. kernow

    kernow Well-Known Member

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    The most important line in the mysqltuner comment you posted is this:
    You can't hope to get a clear picture using mysqltuner until your server has been running at least 24 hours, preferably 48 hours.
     
  3. cPanelMichael

    cPanelMichael Forums Analyst
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  4. tone

    tone Member

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    Here's an updated version after letting it run for longer:

    Code:
    -------- General Statistics --------------------------------------------------
    [--] Skipped version check for MySQLTuner script
    [OK] Currently running supported MySQL version 5.5.31-cll
    [OK] Operating on 64-bit architecture
    
    -------- Storage Engine Statistics -------------------------------------------
    [--] Status: +Archive -BDB -Federated +InnoDB -ISAM -NDBCluster
    [--] Data in MyISAM tables: 211M (Tables: 950)
    [--] Data in InnoDB tables: 836M (Tables: 1522)
    [--] Data in PERFORMANCE_SCHEMA tables: 0B (Tables: 17)
    [--] Data in MEMORY tables: 497K (Tables: 24)
    [!!] Total fragmented tables: 130
    
    -------- Performance Metrics -------------------------------------------------
    [--] Up for: 3d 9h 38m 31s (8M q [27.759 qps], 438K conn, TX: 376B, RX: 3B)
    [--] Reads / Writes: 86% / 14%
    [--] Total buffers: 2.0G global + 2.8M per thread (5000 max threads)
    [OK] Maximum possible memory usage: 15.5G (66% of installed RAM)
    [OK] Slow queries: 0% (1K/8M)
    [OK] Highest usage of available connections: 4% (229/5000)
    [OK] Key buffer size / total MyISAM indexes: 8.0M/59.2M
    [OK] Key buffer hit rate: 99.8% (53M cached / 119K reads)
    [!!] Query cache is disabled
    [OK] Sorts requiring temporary tables: 0% (36 temp sorts / 1M sorts)
    [!!] Joins performed without indexes: 56537
    [!!] Temporary tables created on disk: 43% (190K on disk / 434K total)
    [OK] Thread cache hit rate: 99% (229 created / 438K connections)
    [!!] Table cache hit rate: 0% (400 open / 79K opened)
    [OK] Open file limit used: 0% (177/25K)
    [OK] Table locks acquired immediately: 99% (10M immediate / 10M locks)
    [OK] InnoDB data size / buffer pool: 836.5M/2.0G
    
    -------- Recommendations -----------------------------------------------------
    General recommendations:
        Run OPTIMIZE TABLE to defragment tables for better performance
        Enable the slow query log to troubleshoot bad queries
        Adjust your join queries to always utilize indexes
        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
    Variables to adjust:
        query_cache_size (>= 8M)
        join_buffer_size (> 128.0K, or always use indexes with joins)
        tmp_table_size (> 16M)
        max_heap_table_size (> 16M)
        table_cache (> 400)
    
     
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