Linux – Run OPTIMIZE TABLE to defragment tables for better performance

linuxMySQLputty

I am running Linux 64-Bit OS. My mysql tuner is saying the things below:

-------- General Statistics --------------------------------------------------
[--] Skipped version check for MySQLTuner script
[OK] Currently running supported MySQL version 5.1.61-log
[OK] Operating on 64-bit architecture

-------- Storage Engine Statistics -------------------------------------------
[--] Status: -Archive -BDB -Federated +InnoDB -ISAM -NDBCluster
[--] Data in MyISAM tables: 1G (Tables: 1914)
[--] Data in InnoDB tables: 4M (Tables: 199)
[!!] Total fragmented tables: 296

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

-------- Performance Metrics -------------------------------------------------
[--] Up for: 6s (7K q [1K qps], 142 conn, TX: 8M, RX: 701K)
[--] Reads / Writes: 97% / 3%
[--] Total buffers: 1.7G global + 13.2M per thread (384 max threads)
[OK] Maximum possible memory usage: 6.6G (42% of installed RAM)
[OK] Slow queries: 0% (0/7K)
[OK] Highest usage of available connections: 5% (20/384)
[OK] Key buffer size / total MyISAM indexes: 1.5G/2.7G
[OK] Key buffer hit rate: 97.4% (553K cached / 14K reads)
[OK] Query cache efficiency: 64.6% (4K cached / 6K selects)
[OK] Query cache prunes per day: 0
[OK] Sorts requiring temporary tables: 0% (2 temp sorts / 337 sorts)
[OK] Temporary tables created on disk: 8% (17 on disk / 198 total)
[OK] Thread cache hit rate: 85% (20 created / 142 connections)
[OK] Table cache hit rate: 98% (438 open / 445 opened)
[OK] Open file limit used: 10% (856/8K)
[OK] Table locks acquired immediately: 99% (2K immediate / 2K locks)
[OK] InnoDB data size / buffer pool: 4.2M/8.0M


-------- Recommendations -----------------------------------------------------
General recommendations:
    Run OPTIMIZE TABLE to defragment tables for better performance
    MySQL started within last 24 hours - recommendations may be inaccurate

Their recommendations is to run OPTIMIZE TABLE to defragment tables for better performance; But I don't know how to run it via Putty.

Is there anyone who can give me the code how do I run it via Putty?

Best Answer

OPTIMIZE TABLE is a SQL statement - run it in a MySQL client.

On the command line of the server, you should have the command line client installed; you can connect to your database in the client with mysql -u username -p.

See the documentation on OPTIMIZE TABLE for more information.

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