default-storage-engine=INNODB
collation_server=utf8_general_ci
character_set_server=utf8

innodb_file_per_table=1
max_allowed_packet=512M

local-infile=0
innodb_additional_mem_pool_size=512M
innodb_buffer_pool_size=2048M
innodb_flush_log_at_trx_commit=1

query_cache_size=512M
join_buffer_size=2G
thread_cache_size=36
query_cache_limit=512M

key_buffer_size=2048M
join_buffer_size=512M

 >>  MySQLTuner 1.2.0 - Major Hayden <major@mhtx.net>;
 >>  Bug reports, feature requests, and downloads at http://mysqltuner.com/
 >>  Run with '--help' for additional options and output filtering

-------- General Statistics --------------------------------------------------
[--] Skipped version check for MySQLTuner script
[OK] Currently running supported MySQL version 5.5.30-cll
[OK] Operating on 64-bit architecture

-------- Storage Engine Statistics -------------------------------------------
[--] Status: +Archive -BDB -Federated +InnoDB -ISAM -NDBCluster
[--] Data in MyISAM tables: 26M (Tables: 64)
[--] Data in InnoDB tables: 1G (Tables: 167)
[--] Data in PERFORMANCE_SCHEMA tables: 0B (Tables: 17)
[!!] Total fragmented tables: 23

-------- Security Recommendations  -------------------------------------------
[OK] All database users have passwords assigned

-------- Performance Metrics -------------------------------------------------
[--] Up for: 2d 0h 16m 14s (840K q [4.839 qps], 46K conn, TX: 1B, RX: 187M)
[--] Reads / Writes: 52% / 48%
[--] Total buffers: 5.0G global + 2.0G per thread (151 max threads)
[color=red][!!] Maximum possible memory usage: 307.4G (1975% of installed RAM)[/color]
[color=green][OK] Slow queries: 0% (15/840K)[/color]
[OK] Highest usage of available connections: 29% (44/151)
[OK] Key buffer size / total MyISAM indexes: 2.0G/5.9M
[OK] Key buffer hit rate: 99.9% (1M cached / 721 reads)
[color=green][OK] Query cache efficiency: 24.0% (100K cached / 420K selects)[/color]
[!!] Query cache prunes per day: 2428
[OK] Sorts requiring temporary tables: 0% (8 temp sorts / 18K sorts)
[!!] Joins performed without indexes: 20848
[OK] Temporary tables created on disk: 17% (5K on disk / 32K total)
[OK] Thread cache hit rate: 99% (50 created / 46K connections)
[OK] Table cache hit rate: 52% (348 open / 663 opened)
[OK] Open file limit used: 4% (179/4K)
[OK] Table locks acquired immediately: 100% (465K immediate / 465K locks)
[OK] InnoDB data size / buffer pool: 1.2G/2.0G

-------- Recommendations -----------------------------------------------------
General recommendations:
    Run OPTIMIZE TABLE to defragment tables for better performance
    Reduce your overall MySQL memory footprint for system stability
    Enable the slow query log to troubleshoot bad queries
    Increasing the query_cache size over 128M may reduce performance
    Adjust your join queries to always utilize indexes
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 (> 2.0G, or always use indexes with joins)

[--] Data in MyISAM tables: 26M (Tables: 64)
[OK] Key buffer size / total MyISAM indexes: 2.0G/5.9M
[OK] Key buffer hit rate: 99.9% (1M cached / 721 reads)