title: Database server eating more than 100% from CPU
body: <p>My database server eating more than 100% from  CPU</p>
  
  <p>when i run mysqltuner its given following <code>recommendation</code> </p>
  
  <pre><code>]# sudo ./mysqltuner.pl
  
   &gt;&gt;  MySQLTuner 1.2.0 - Major Hayden &lt;major@mhtx.net&gt;
   &gt;&gt;  Bug reports, feature requests, and downloads at http://mysqltuner.com/
   &gt;&gt;  Run with '--help' for additional options and output filtering
  
  -------- General Statistics --------------------------------------------------
  [--] Skipped version check for MySQLTuner script
  [OK] Currently running supported MySQL version 5.0.92-community
  [!!] Switch to 64-bit OS - MySQL cannot currently use all of your RAM
  
  -------- Storage Engine Statistics -------------------------------------------
  [--] Status: +Archive -BDB +Federated +InnoDB -ISAM -NDBCluster
  [--] Data in MyISAM tables: 1G (Tables: 9347)
  [--] Data in InnoDB tables: 477M (Tables: 1803)
  [--] Data in MEMORY tables: 0B (Tables: 4)
  [!!] Total fragmented tables: 98
  
  -------- Security Recommendations  -------------------------------------------
  [OK] All database users have passwords assigned
  
  -------- Performance Metrics -------------------------------------------------
  [--] Up for: 2d 8h 25m 8s (87M q [430.053 qps], 534K conn, TX: 2B, RX: 2B)
  [--] Reads / Writes: 89% / 11%
  [--] Total buffers: 670.0M global + 2.7M per thread (100 max threads)
  [OK] Maximum possible memory usage: 938.7M (30% of installed RAM)
  [OK] Slow queries: 0% (1K/87M)
  [!!] Highest connection usage: 100%  (101/100)
  [OK] Key buffer size / total MyISAM indexes: 8.0M/610.0M
  [OK] Key buffer hit rate: 96.9% (10B cached / 331M reads)
  [OK] Query cache efficiency: 89.9% (73M cached / 81M selects)
  [!!] Query cache prunes per day: 148657
  [OK] Sorts requiring temporary tables: 0% (467 temp sorts / 560K sorts)
  [!!] Joins performed without indexes: 11968
  [OK] Temporary tables created on disk: 23% (334K on disk / 1M total)
  [OK] Thread cache hit rate: 86% (71K created / 534K connections)
  [!!] Table cache hit rate: 0% (80 open / 918K opened)
  [OK] Open file limit used: 11% (117/1K)
  [OK] Table locks acquired immediately: 96% (11M immediate / 11M locks)
  [OK] InnoDB data size / buffer pool: 477.2M/500.0M
  
  -------- Recommendations -----------------------------------------------------
  General recommendations:
      Run OPTIMIZE TABLE to defragment tables for better performance
      Enable the slow query log to troubleshoot bad queries
      Reduce or eliminate persistent connections to reduce connection usage
      Adjust your join queries to always utilize indexes
      Increase table_cache gradually to avoid file descriptor limits
  Variables to adjust:
      max_connections (&gt; 100)
      wait_timeout (&lt; 28800)
      interactive_timeout (&lt; 28800)
      query_cache_size (&gt; 96M)
      join_buffer_size (&gt; 128.0K, or always use indexes with joins)
      table_cache (&gt; 80)
  
  
      Already my.cnf value is
  
  [mysqld]
  innodb_buffer_pool_size = 500M
  max_heap_table_size = 64M
  query_cache_limit = 1M
  query_cache_size = 96M
  query_cache_type = 1
  table_cache = 128
  thread_cache_size = 4
  tmp_table_size = 96M
  </code></pre>
  
  <p>now what can i do in my.cnf
  kindly help me
  tks</p>