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need help with mysql optimization please

Discussion in 'Workarounds and Optimization' started by mark135uk, Feb 6, 2015.

  1. mark135uk

    mark135uk Registered

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    hi im having some small trouble with my server load going over, my server details are below

    Code:
    CPU
        Intel(R) Xeon(R) CPU E5-1650 v2 @ 3.50GHz
        Cores : 12
        Cache : 12288KB
    RAM
        8x 16384MB
    Disks
        2 x 2000 GB
    Motherboard
        X9SRE/X9SRE-3F/X9SRi/X9SRi-3F
    my .conf below

    Code:
    root@ns426755 [~]# cat /etc/my.cnf
    [mysqld]
    innodb_file_per_table=1
    bind-address=127.0.0.1
    
    
    
    
    #### ADDDED ALL BEWLO LINES ON JUNE,06,2014
    # Memory usage
    skip-external-locking
    max_connections = 3056
    max_user_connections = 3056
    max_connect_errors = 999999
    innodb_file_per_table = ON
    innodb_buffer_pool_size = 8G
    key_buffer = 1024M
    key_buffer_size = 512M
    max_allowed_packet=268435456
    group_concat_max_len = 12192
    table_cache = 1024
    tmp_table_size = 256M
    max_heap_table_size = 128M
    sort_buffer_size = 3M
    read_buffer_size = 3M
    read_rnd_buffer_size = 10M
    bulk_insert_buffer_size = 8M
    myisam_sort_buffer_size = 64M
    query_prealloc_size = 262144
    query_alloc_block_size = 65535
    transaction_alloc_block_size = 8192
    transaction_prealloc_size = 4096
    max_write_lock_count = 8
    query_cache_limit = 5M
    thread_cache_size = 382
    query_cache_size= 128M
    # Try number of CPU's*2 for thread_concurrency (eHound has 4 CPU's)
    thread_concurrency = 24
    
    # Disable Federated by default
    skip-federated
    
    open_files_limit=10000
    [mysqld_safe]
    log-error="/var/log/mysqld.log"
    pid-file="/var/run/mysqld/mysqld.pid"
    
    [mysqldump]
    quick
    max_allowed_packet = 64M
    
    [mysql]
    no-auto-rehash
    
    [isamchk]
    key_buffer = 512M
    sort_buffer_size = 512M
    read_buffer = 256M
    write_buffer = 256M
    
    [myisamchk]
    key_buffer = 512M
    sort_buffer = 512M
    max_allowed_packet = 14M
    read_buffer = 8256M
    write_buffer = 256M
    sort_buffer_size = 1M
    join_buffer_size = 1M
    thread_stack = 192K
    
    [mysqlhotcopy]
    interactive-timeout
    
    i have quite a bit of ram but dont know if im making use of it all, if you need any more info let me know

    thanks in advance :)
     
  2. mark135uk

    mark135uk Registered

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    here are my sqltuner results

    Code:
    >>  MySQLTuner 1.4.0 - Major Hayden <major@mhtx.net>
     >>  Bug reports, feature requests, and downloads at http://mysqltuner.com/
     >>  Run with '--help' for additional options and output filtering
    [OK] Currently running supported MySQL version 5.5.40-cll
    [OK] Operating on 64-bit architecture
    
    -------- Storage Engine Statistics -------------------------------------------
    [--] Status: +ARCHIVE +BLACKHOLE +CSV -FEDERATED +InnoDB +MRG_MYISAM
    [--] Data in MyISAM tables: 2G (Tables: 123)
    [--] Data in InnoDB tables: 7M (Tables: 77)
    [--] Data in PERFORMANCE_SCHEMA tables: 0B (Tables: 17)
    [!!] Total fragmented tables: 11
    
    -------- Security Recommendations  -------------------------------------------
    [OK] All database users have passwords assigned
    
    -------- Performance Metrics -------------------------------------------------
    [--] Up for: 2d 0h 10m 52s (165M q [956.931 qps], 2M conn, TX: 499B, RX: 24B)
    [--] Reads / Writes: 34% / 66%
    [--] Total buffers: 8.8G global + 16.4M per thread (3056 max threads)
    [OK] Maximum possible memory usage: 57.6G (45% of installed RAM)
    [OK] Slow queries: 0% (40/165M)
    [OK] Highest usage of available connections: 5% (153/3056)
    [OK] Key buffer size / total MyISAM indexes: 512.0M/1.3G
    [OK] Key buffer hit rate: 100.0% (35B cached / 6M reads)
    [OK] Query cache efficiency: 48.6% (38M cached / 79M selects)
    [!!] Query cache prunes per day: 62165
    [OK] Sorts requiring temporary tables: 1% (228K temp sorts / 17M sorts)
    [!!] Joins performed without indexes: 4074
    [!!] Temporary tables created on disk: 37% (65K on disk / 176K total)
    [OK] Thread cache hit rate: 99% (153 created / 2M connections)
    [!!] Table cache hit rate: 14% (992 open / 6K opened)
    [OK] Open file limit used: 6% (1K/15K)
    [OK] Table locks acquired immediately: 95% (138M immediate / 145M locks)
    [OK] InnoDB buffer pool / data size: 8.0G/7.7M
    [OK] InnoDB log waits: 0
    -------- 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_open_cache gradually to avoid file descriptor limits
        Read this before increasing table_open_cache over 64: http://bit.ly/1mi7c4C
    Variables to adjust:
        query_cache_size (> 128M)
        join_buffer_size (> 128.0K, or always use indexes with joins)
        tmp_table_size (> 256M)
        max_heap_table_size (> 128M)
        table_open_cache (> 1024)
    
    thanks in advance
     
  3. cPanelMichael

    cPanelMichael Forums Analyst
    Staff Member

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    Hello :)

    Aside from the MySQL optimization request, you also mentioned:

    You may find this thread helpful:

    Troubleshooting High Loads On Linux Systems

    Thank you.
     
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