Jeffrey Schutzman

Provides details on your WP-eCommerce and WordPress installation state, issues and performance.
We have provided this plugin in the hope that it will help you identify issues with your WordPress and WP-eCommerce 
configuration.
<h4>Checks for the following unfortunate conditions existing on your site:</h4>
<ul>
<li>Unreachable links to products, checkout, results and user profile pages. Checks HTTP and HTTPS.</li>
<li>Too many options in the WordPress options table</li>
<li>Too many autoload options in the WordPress options table</li>
<li>Too much autoload data in the WordPress options table</li>
<li>Too many transients in the WordPress database</li>
<li>Expired transients in the WordPress database</li>
<li>Orphaned WordPress post meta</li>
<li>Orphaned WordPress taxonomy terms</li>
<li>Memcache not present</li>
<li>APC not present</li>
<li>Object cache not functioning</li>
<li>Slow un-cached query performance</li>
<li>Slow cached query performance</li>
</ul>
<h4>Makes available to the store administrator individual actions that will:</h4>
<ul>
<li>Delete all WordPress Transients from the WordPress database</li>
<li>Delete expired WordPress transients from the WordPress database</li>
<li>Delete orphaned WordPress post meta</li>
<li>Delete orphaned WordPress taxonomy meta</li>
<li>Delete all files that are part of the WordPress cache</li>
<li>Flush the WordPress cache</li>
<li>Test the configuration of memcache object cache</li>
<li>Initiate a memcache (object cache) flush</li>
</ul>

Store Check-Up and Fix-Up for WP-eCommerce

Provides details on your WP-eCommerce and WordPress installation state, issues and performance.

Aleksei Znaev

Plugin for measuring hosting benchmarks stability in time. 
It uses several benchmarks to find out is your hoster stable or not. Like,
<ol>
<li>CPU test</li>
<li>Disk test</li>
<li>Database test</li>
</ol>
The plugin stores benchmarks results and displays detailed graph for every benchmark. The graph shows hosting performance peaks and dips. 
Many peaks and dips mean low hosting stability. You can use this in hosting support conversations.
The plugin uses this <a href="https://github.com/hostingstabilitymeter/php-benchmarks-library" rel="nofollow ugc">benchmarks library</a>. 
Each benchmark takes no more that 1 second. You fully control benchmarks calls frequency.
The plugin may inform you about performance lacks by e-mail. 
Also it may send stability benchmark results to <a href="https://HostingStabilityMeter.Com" rel="nofollow ugc">HostingStabilityMeter.Com</a> if you allow. It helps to maintain a rating of hosters.
Note: <a href="https://HostingStabilityMeter.Com" rel="nofollow ugc">HostingStabilityMeter.Com</a> will never publish or give somebody neither your benchmark results nor hardware information.

Hosting Stability Meter

Benchmarks stability measuring in time. Detailed interactive graph for hosting performance peaks and dips let you know hosting is good or bad.

Store Check-Up and Fix-Up for WP-eCommerce vs Hosting Stability Meter