CantonBolo

Optimize your database, support WordPress mutisite.
优化你的数据库，支持多站点。

Database Optimizer by Bolo

Optimize your database, support WordPress mutisite. 优化你的数据库，支持多站点。

gerrygooner

This WordPress plugin will cleanup your WordPress database, performing the following actions:
<ul>
<li>Remove all post revisions.</li>
<li>Remove all spam comments.</li>
<li>Remove all unapproved comments.</li>
<li>Remove all unused tags.</li>
<li>Remove all unused post meta.</li>
<li>Optimize MySQL tables by removing all unused table space.</li>
</ul>
Based on WP-Cleanup by JortK, this plugin replaces usage of mysql_query() that was deprecated in PHP 5.5 with WP_Query functions .

Database Optimizer by Bolo vs WP-CleanDB