nikdow

Use this plugin to display detailed information about your server’s OPCache, including memory utilisation, list of all scripts cached and a useful memory utilisation visualisation based on the file system tree.
This plugin is based on https://github.com/rlerdorf/opcache-status which is for general PHP use, we have turned it into a WordPress plugin for ease of installation. Apart from some rearrangement of scripts to suit WP load conventions, the code is to date unaltered. WordPress capability ‘activate_plugins’ is required to see it in the admin menu and to run it.
After you install and activate this plugin, look in the admin Tools menu for OPCache.

OPCache Scripts

Use this plugin to display detailed information about your server’s OPCache, including memory utilisation, and a list of all scripts cached.

Danila Vershinin

This plugin clears OPcache after updating WordPress core, themes, and files. 
Unlike other plugins, it is also compatible with <a href="https://www.getpagespeed.com/server-setup/performance-friendly-wordpress-updates" rel="nofollow ugc">WordPress updates made by Linux cron</a>.
<h3>Notice</h3>
<ul>
<li>Important: To use this plugin, check the following.
<ol>
<li>PHP 5.5 or later, Did you compile PHP with –enable-opcache option?</li>
<li>PHP 5.4 or earlier, Did you installed PECL ZendOpcache?</li>
<li>If not, please see <a href="http://php.net/book.opcache" rel="nofollow ugc">this document</a> and enable/install OPcache.</li>
<li>The <a href="https://github.com/gordalina/cachetool" rel="nofollow ugc">cachetool</a> utility must be configured in order for OPCache to be cleared by this plugin. It must be in your <code>PATH</code> and named <code>cachetool</code>.</li>
<li>The “which” utility (typically preinstalled), thus a Linux OS</li>
</ol>
</li>
</ul>

OPcache Reset

Automatic OPcache reset for WordPress. Invalidates both in-memory and file-based OPCache upon upgrading WordPress.

OPCache Scripts vs OPcache Reset