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POstrange mysql performance
 

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    <p>I've been conducting some mysql performance tests and have yield very strange results. I am running a query across the following mysql versions: 5.0.91, 5.1.52, 5.1.52 with innodb-plugin, and 5.5.7.</p> <p>Here is the execution time for the query on each version:</p> <pre><code>version time ------------------------ 5.0: 95s 5.1: 122s 5.1 innodb-plugin: 159s 5.5: 127s </code></pre> <p>I am testing against same data (50M records in one table), on Windows 2003. Database is using InnoDB engine on all versions.</p> <p>I don't understand how MySQL 5.0 would be the fastest, how the innodb-plugin yields worst results than when not in use and how 5.5 is so similar to 5.1 in performance.</p> <p>Anyone run into this? Anyone have suggestions?</p> <p>Here are my.ini configs:</p> <ul> <li>query_cache_size=0</li> <li>table_cache=256</li> <li>tmp_table_size=2000M</li> <li>thread_cache_size=32</li> <li>innodb_additional_mem_pool_size=128M</li> <li>innodb_flush_log_at_trx_commit=2</li> <li>innodb_log_buffer_size=4M</li> <li>innodb_buffer_pool_size=8G</li> <li>innodb_log_file_size=256M</li> <li>innodb_thread_concurrency=32</li> </ul> <p>innodb-plugin specific:</p> <ul> <li>ignore_builtin_innodb</li> <li>plugin-load=innodb=ha_innodb_plugin.dll;innodb_trx=ha_innodb_plugin.dll;innodb_locks=ha_innodb_plugin.dll;innodb_lock_waits=ha_innodb_plugin.dll;innodb_cmp=ha_innodb_plugin.dll;innodb_cmp_reset=ha_innodb_plugin.dll;innodb_cmpmem=ha_innodb_plugin.dll;innodb_cmpmem_reset=ha_innodb_plugin.dll</li> <li>innodb_file_format=Barracuda</li> <li>innodb_io_capacity=400</li> </ul>
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    1. COPost your benchmark code. + my.ini params
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      1. USAndrey Frolov
 

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