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.

Budiony Damyanov

Easy cache takes a real-time snapshot of every Page, Post, Category, Link, etc. These snapshots are then stored (cached) into folder of your choice, so they can be referenced and served to the visitor later, in order to save database processing time that has been slowing your website down.
The Easy cache plugin uses configuration options that you select from the Administration panel. Search for <code>Easy cache</code> in your <code>Settings</code> page. 
Easy cache excludes administrative or WP system login pages from caching (i.e. it works only on public part of your blog). Only NOT logged-in users (which are the most) can benefit from caching mechanism when they visit the public part of your website. Password-protected pages or posts are excluded from caching too.
There is an automatic cache expiration system, which runs through WordPress® behind-the-scene, according to your <code>Cached file expires after</code> setting, also various cache and server load statistics are available for precise tracking of what is going on.
The Easy cache plugin has been tested with various permalink settings, various pagination plugins like <code>WP Pagenavi</code> and <code>WPML WordPress Multilingual Plugin</code>, also with <code>WordPress® Jetpack</code> mobile theme, with variuos custom post types, custom queries, custom pages outside WordPress® installation directory and a number of widely used plugins, however if you experience troubles, post your issue on the plugin’s forum.
Supported languages
<ul>
<li>
English
</li>
<li>
Spanish
</li>
<li>
French
</li>
<li>
Bulgarian
</li>
</ul>

bodi0`s Easy cache

Speed up your blog with Easy Cache, bullet-proof and easy-to-use website caching mechanism for WordPress that just works.

Store Check-Up and Fix-Up for WP-eCommerce vs bodi0`s Easy cache