mysqltuner 설치

thefunky-monkey.com/page-364/centos-7-mysql-8-0/

> wget -O /usr/bin/mysqltuner https://raw.githubusercontent.com/major/MySQLTuner-perl/master/mysqltuner.pl
> chmod 755 /usr/bin/mysqltuner




> mysqltuner
 >>  MySQLTuner 1.3.0 - 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] Logged in using credentials from debian maintenance account.
[!!] Currently running unsupported MySQL version 10.0.12-MariaDB-1~wheezy-log
[OK] Operating on 64-bit architecture

-------- Storage Engine Statistics -------------------------------------------
[--] Status: +ARCHIVE +Aria +BLACKHOLE +CSV +FEDERATED +InnoDB +MRG_MyISAM
[--] Data in MyISAM tables: 166M (Tables: 84)
[--] Data in InnoDB tables: 763M (Tables: 293)
[--] Data in PERFORMANCE_SCHEMA tables: 0B (Tables: 52)
[--] Data in MEMORY tables: 0B (Tables: 1)
[!!] Total fragmented tables: 49

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

-------- Performance Metrics -------------------------------------------------
[--] Up for: 9d 2h 43m 31s (37M q [47.313 qps], 291K conn, TX: 42B, RX: 6B)
[--] Reads / Writes: 88% / 12%
[--] Total buffers: 1.3G global + 23.3M per thread (100 max threads)
[OK] Maximum possible memory usage: 3.6G (11% of installed RAM)
[OK] Slow queries: 0% (325/37M)
[OK] Highest usage of available connections: 33% (33/100)
[OK] Key buffer size / total MyISAM indexes: 128.0M/35.9M
[OK] Key buffer hit rate: 97.9% (22M cached / 464K reads)
[OK] Query cache efficiency: 36.3% (15M cached / 42M selects)
[!!] Query cache prunes per day: 127508
[OK] Sorts requiring temporary tables: 0% (0 temp sorts / 253K sorts)
[!!] Joins performed without indexes: 3127
[OK] Temporary tables created on disk: 15% (133K on disk / 851K total)
[OK] Thread cache hit rate: 99% (33 created / 291K connections)
[!!] Table cache hit rate: 0% (457 open / 2M opened)
[OK] Open file limit used: 22% (229/1K)
[OK] Table locks acquired immediately: 99% (16M immediate / 16M locks)
[OK] InnoDB buffer pool / data size: 768.0M/763.6M
[OK] InnoDB log waits: 0
-------- Recommendations -----------------------------------------------------
General recommendations:
    Run OPTIMIZE TABLE to defragment tables for better performance
    Increasing the query_cache size over 128M may reduce performance
    Adjust your join queries to always utilize indexes
    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 (> 384M) [see warning above]
    join_buffer_size (> 16.0M, or always use indexes with joins)
    table_open_cache (> 457)