Pierre Lannoy

Hosterra

OPcache statistics and management right in the WordPress admin dashboard.
OPcache Manager is a full featured OPcache management and analytics reporting tool. It allows you to monitor and optimize OPcache operations on your WordPress site or network.
OPcache Manager works on dedicated or shared servers. In shared environments, its use has no influence on other hosted sites than yours. Its main management features are:
<ul>
<li>individual script invalidation, forced invalidation and recompilation;</li>
<li>manual site invalidation – a sort of ‘smart’ OPcache reset only for your site;</li>
<li>manual site warm-up – to pre-compile all of you site files;</li>
<li>optional scheduled site invalidation and/or warm-up.</li>
</ul>
OPcache Manager is also a full featured analytics reporting tool that analyzes all OPcache operations on your site. It can report:
<ul>
<li>KPIs: hit ratio, free memory, cached files, keys saturation, buffer saturation and availability;</li>
<li>metrics variations;</li>
<li>metrics distributions;</li>
<li>OPcache related events.</li>
</ul>
OPcache Manager supports multisite report delegation (see FAQ).
OPcache Manager supports a set of WP-CLI commands to:
<ul>
<li>invalidate or warmup cache – see <code>wp help opcache invalidate</code> and <code>wp help opcache warmup</code> for details;</li>
<li>toggle on/off main settings – see <code>wp help opcache settings</code> for details;</li>
<li>obtain operational statistics – see <code>wp help opcache analytics</code> for details.</li>
</ul>
For a full help on WP-CLI commands in OPcache Manager, please <a href="https://perfops.one/opcache-manager-wpcli" rel="nofollow ugc">read this guide</a>.
<blockquote>
OPcache Manager is part of <a href="https://perfops.one/" rel="nofollow ugc">PerfOps One</a>, a suite of free and open source WordPress plugins dedicated to observability and operations performance.
</blockquote>
OPcache Manager is a free and open source plugin for WordPress. It integrates many other free and open source works (as-is or modified). Please, see ‘about’ tab in the plugin settings to see the details.
<h4>Support</h4>
This plugin is free and provided without warranty of any kind. Use it at your own risk, I’m not responsible for any improper use of this plugin, nor for any damage it might cause to your site. Always backup all your data before installing a new plugin.
Anyway, I’ll be glad to help you if you encounter issues when using this plugin. Just use the support section of this plugin page.
<h4>Privacy</h4>
This plugin, as any piece of software, is neither compliant nor non-compliant with privacy laws and regulations. It is your responsibility to use it with respect for the personal data of your users and applicable laws.
This plugin doesn’t set any cookie in the user’s browser.
This plugin doesn’t handle personally identifiable information (PII).
<h4>Donation</h4>
If you like this plugin or find it useful and want to thank me for the work done, please consider making a donation to <a href="https://www.laquadrature.net/en" rel="nofollow ugc">La Quadrature Du Net</a> or the <a href="https://www.eff.org/" rel="nofollow ugc">Electronic Frontier Foundation</a> which are advocacy groups defending the rights and freedoms of citizens on the Internet. By supporting them, you help the daily actions they perform to defend our fundamental freedoms!

OPcache Manager

OPcache statistics and management right in the WordPress admin dashboard.

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 Manager vs OPcache Reset