root@vm1:~# ./mysqltuner.pl

 >>  MySQLTuner 1.4.0 - Major Hayden <[email protected]>
 >>  Bug reports, feature requests, and downloads at http://mysqltuner.com/
 >>  Run with '--help' for additional options and output filtering
[OK] Logged in using credentials from debian maintenance account.
[OK] Currently running supported MySQL version 5.5.42-MariaDB-1~wheezy-log
[OK] Operating on 64-bit architecture

-------- Storage Engine Statistics -------------------------------------------
[--] Status: +ARCHIVE +Aria +BLACKHOLE +CSV +FEDERATED +InnoDB +MRG_MYISAM +SPHINX
[--] Data in MyISAM tables: 325K (Tables: 2)
[--] Data in InnoDB tables: 2G (Tables: 54)
[--] Data in PERFORMANCE_SCHEMA tables: 0B (Tables: 17)
[!!] Total fragmented tables: 12

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

-------- Performance Metrics -------------------------------------------------
[--] Up for: 4h 59m 16s (37M q [2K qps], 4M conn, TX: 7B, RX: 8B)
[--] Reads / Writes: 78% / 22%
[--] Total buffers: 15.1G global + 2.9M per thread (4000 max threads)
[OK] Maximum possible memory usage: 26.5G (74% of installed RAM)
[OK] Slow queries: 0% (214K/37M)
[OK] Highest usage of available connections: 2% (97/4000)
[OK] Key buffer size / total MyISAM indexes: 32.0M/132.0K
[OK] Key buffer hit rate: 100.0% (3M cached / 13 reads)
[!!] Query cache efficiency: 0.6% (133K cached / 20M selects)
[OK] Query cache prunes per day: 0
[OK] Sorts requiring temporary tables: 0% (41 temp sorts / 4M sorts)
[OK] Temporary tables created on disk: 0% (10 on disk / 2M total)
[OK] Thread cache hit rate: 99% (114 created / 4M connections)
[OK] Table cache hit rate: 108% (334 open / 308 opened)
[OK] Open file limit used: 0% (56/65K)
[OK] Table locks acquired immediately: 100% (45M immediate / 45M locks)
[OK] InnoDB buffer pool / data size: 15.0G/2.7G
[OK] InnoDB log waits: 0
-------- Recommendations -----------------------------------------------------
General recommendations:
    Run OPTIMIZE TABLE to defragment tables for better performance
    MySQL started within last 24 hours - recommendations may be inaccurate
Variables to adjust:
    query_cache_limit (> 2M, or use smaller result sets)