Dion

UsageDD allows administrators to monitor the resource usage of their WordPress installation. It will add a small box at the bottom center of each page, only visible to administrators, that displays the number of MySQL queries, the amount of memory used by the page’s code, and if you are using a compatible webserver (most are compatible), the “time to first byte” (TTFB) and the time required to generate the full page. TTFB is used by Google for page-ranking purposes, and it will be the first of the two displayed.
You can use the display to determine if your site has too many plugins loaded, if your theme is too “heavy”, or if something is wrong on your server. The plugin itself uses virtually no resources and should be compatible with every theme and plugin that outputs HTML.
Support is available in our <a href="https://forum.dion-designs.com/f35/usagedd-support/" rel="nofollow ugc">dedicated support area</a>. Support questions posted on wordpress.org may go unanswered for an extended period of time.

UsageDD

UsageDD allows administrators to monitor the resource usage of their WordPress installation.

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.

UsageDD vs Hosting Stability Meter