mysqltuner 16/05/2014

 >>  MySQLTuner 1.3.0 - Major Hayden <[email protected]>
 >>  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 5.6.17
[OK] Operating on 64-bit architecture

-------- Storage Engine Statistics -------------------------------------------
[--] Status: Warning: Using a password on the command line interface can be insecure.
+ARCHIVE +BLACKHOLE +CSV -FEDERATED +InnoDB +MRG_MYISAM
Warning: Using a password on the command line interface can be insecure.
Warning: Using a password on the command line interface can be insecure.
[--] Data in MyISAM tables: 3G (Tables: 1176)
[--] Data in InnoDB tables: 48M (Tables: 317)
[--] Data in PERFORMANCE_SCHEMA tables: 0B (Tables: 52)
[--] Data in MEMORY tables: 1M (Tables: 8)
[!!] Total fragmented tables: 56

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

-------- Performance Metrics -------------------------------------------------
[--] Up for: 15d 13h 38m 46s (117M q [87.667 qps], 6M conn, TX: 2352B, RX: 35B)
[--] Reads / Writes: 87% / 13%
[--] Total buffers: 2.0G global + 2.0G per thread (30 max threads)
[!!] Maximum possible memory usage: 62.0G (388% of installed RAM)
[OK] Slow queries: 0% (1K/117M)
[OK] Highest usage of available connections: 43% (13/30)
[OK] Key buffer size / total MyISAM indexes: 1.2G/1.4G
[OK] Key buffer hit rate: 99.7% (5B cached / 15M reads)
[!!] Query cache efficiency: 0.0% (0 cached / 69M selects)
[OK] Query cache prunes per day: 0
[OK] Sorts requiring temporary tables: 0% (34K temp sorts / 9M sorts)
[!!] Joins performed without indexes: 342841
[OK] Temporary tables created on disk: 25% (1M on disk / 5M total)
[OK] Thread cache hit rate: 99% (13 created / 6M connections)
[!!] Table cache hit rate: 4% (1K open / 36K opened)
[OK] Open file limit used: 11% (1K/11K)
[OK] Table locks acquired immediately: 99% (136M immediate / 136M locks)
[OK] InnoDB buffer pool / data size: 256.0M/48.3M
[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
    Adjust your join queries to always utilize indexes
    Increase table_cache gradually to avoid file descriptor limits
    Read this before increasing table_cache over 64: http://bit.ly/1mi7c4C
Variables to adjust:
  *** MySQL's maximum memory usage is dangerously high ***
  *** Add RAM before increasing MySQL buffer variables ***
    query_cache_limit (> 16M, or use smaller result sets)
    join_buffer_size (> 2.0G, or always use indexes with joins)
    table_cache (> 4096)