Adam WP

<a href="https://squaredaway.studio/wordpress-plugin-memory-usage-bar/" rel="nofollow ugc">Memory Usage Bar</a> is a powerful plugin for WordPress that allows you to display current memory usage on top of the admin header. It so useful to monitor the total memory useage for a single visit.
<h4>Key features</h4>
<ul>
<li>Visible: At the header, its so easy to monitor the current usage.</li>
<li>IAF: This plug is prefer to work sliently, that once you Installed, Activated, then you will Forget it exist.</li>
<li>Green: Nothing added to your WordPress but only pure function.</li>
</ul>
<h4>Donations</h4>
Would you like to buy me a cup of coffee, like friends hang out at Starbucks someday in the afternoon.
<h4>Contribute</h4>
This plug is also available on <a href="https://github.com/ayangyuan/Wordpress-Plugin-Memory-Usage-Bar" rel="nofollow ugc">Github</a>. 
So, if you’ve got some cool feature that you’d like to implement into the plugin or a bug you’ve been able to fix, consider forking the project and sending me a pull request.

Memory Usage Bar

I like it

It only shows in the admin. It should always appear in the toolbar so memory usage can be measured on the front end.

Needs to be shown on front end

Display the current memory usage bar on admin header.

berkux

WP-Memory-Usage is a lightweight but powerful WordPress plugin that monitors and displays memory usage directly in your WordPress admin area. 
This tool is essential for site administrators and developers who need to keep an eye on the memory consumption of their WordPress installation, helping to identify potential issues and optimize performance.
What the plugin shows:
In the admin footer (every admin page): 
* Current memory usage vs. WordPress limit (with percentage) 
* Current memory usage vs. PHP limit (with percentage) 
* Server IP address and server name 
* PHP version
In the Dashboard widget (“Memory Overview”): 
* PHP version, architecture (32/64 bit), max execution time 
* WordPress memory limit (WP_MEMORY_LIMIT), WordPress admin limit (WP_MAX_MEMORY_LIMIT), PHP memory limit 
* Current peak memory usage with a visual progress bar (colour-coded: green / orange / red) 
* Link to the Threshold Alerts settings page
Memory Alerts Tabs (since 2.0.0): 
Log events, set thresholds (Warning / Danger / Critical), monitor memory usage…
<h3>Why Use WP-Memory-Usage?</h3>
Excessive memory usage leads to slower sites, HTTP 500 errors, and failed background jobs (cron, imports, backups). WP-Memory-Usage gives you the information you need to act before users are affected — without overwhelming you with notifications.
<h3>Features</h3>
<ul>
<li>Admin menu: See at settings “Memory Alerts”</li>
<li>Real-time memory display in dashboard and every admin page footer</li>
<li>Colour-coded progress bar (green / orange / red) for instant status recognition</li>
<li>Set Thresholds: Set values for three threshold levels (Warning, Danger, Critical) and switch on/off logging</li>
<li>Set how to measure: Use peak memory?</li>
<li>Set Logging: Log Ajax, Rest, Admin, Cron, favicon, OK</li>
<li>Set how to alert: Mailadress, intervals for rotating and deleting logfiles</li>
<li>History tab: show latest logged requests</li>
<li>Digest tab: browse and review past aggregated requests</li>
<li>Actions tab: practical guidance on what to do when you receive an alert</li>
<li>Memory Thresholds tab: current settings and assessment & recommendations</li>
<li>Check Installation tab: all ok for using this plugin?</li>
<li>Clean uninstall: removes all options, cron jobs, and log files on deletion</li>
<li>New Logo for the Plugin</li>
</ul>
<h3>PluginCheck-Plugin Status</h3>
Plugin is compatible with PluginCheck-Plugin. Note regarding “trademarked_term”: “WP-Memory-Usage” and “wp-memory-usage” are today considered restricted terms. This plugin entered the WordPress repository in 2009, when those terms were permitted.
<h3>Credits</h3>
Copyright 2009–2013 by Alex Rabe, 2022– Bernhard Kux

WP-Memory-Usage

Show up the PHP version, memory limit and current memory usage in the dashboard and admin footer. Optional monitor threshold and alert via email.

Memory Usage Bar vs WP-Memory-Usage