Please find the mysqltunner result which i have taken at the time of high mysql load
>> 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
Please enter your MySQL administrative login: root
Please enter your MySQL administrative password:
-------- General Statistics --------------------------------------------------
[--] Skipped version check for MySQLTuner script
[OK] Currently running supported MySQL version 5.1.71-log
[OK] Operating on 64-bit architecture
-------- Storage Engine Statistics -------------------------------------------
[--] Status: -Archive -BDB -Federated +InnoDB -ISAM -NDBCluster
[--] Data in MyISAM tables: 3G (Tables: 152)
[!!] InnoDB is enabled but isn't being used
[!!] Total fragmented tables: 14
-------- Security Recommendations -------------------------------------------
[!!] User '@ABC-1' has no password set.
[!!] User 'root@ABC-1' has no password set.
-------- Performance Metrics -------------------------------------------------
[--] Up for: 4d 22h 22m 25s (5M q [12.308 qps], 998K conn, TX: 48B, RX: 26B)
[--] Reads / Writes: 44% / 56%
[--] Total buffers: 218.0M global + 2.7M per thread (500 max threads)
[OK] Maximum possible memory usage: 1.6G (4% of installed RAM)
[OK] Slow queries: 0% (192/5M)
[OK] Highest usage of available connections: 48% (241/500)
[OK] Key buffer size / total MyISAM indexes: 64.0M/60.4M
[OK] Key buffer hit rate: 100.0% (585M cached / 241K reads)
[OK] Query cache efficiency: 43.9% (826K cached / 1M selects)
[OK] Query cache prunes per day: 0
[OK] Sorts requiring temporary tables: 0% (130 temp sorts / 165K sorts)
[OK] Temporary tables created on disk: 2% (3K on disk / 153K total)
[OK] Thread cache hit rate: 99% (3K created / 998K connections)
[!!] Table cache hit rate: 0% (64 open / 17K opened)
[OK] Open file limit used: 3% (99/2K)
[OK] Table locks acquired immediately: 96% (2M immediate / 2M locks)
-------- Recommendations -----------------------------------------------------
General recommendations:
Add skip-innodb to MySQL configuration to disable InnoDB
Run OPTIMIZE TABLE to defragment tables for better performance
Increase table_cache gradually to avoid file descriptor limits
Variables to adjust:
long_query_time (<= 10)
table_cache (> 64)
Kindly suggest me