Description
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…
Why Use WP-Memory-Usage?
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.
Features
- Admin menu: See at settings “Memory Alerts”
- Real-time memory display in dashboard and every admin page footer
- Colour-coded progress bar (green / orange / red) for instant status recognition
- Set Thresholds: Set values for three threshold levels (Warning, Danger, Critical) and switch on/off logging
- Set how to measure: Use peak memory?
- Set Logging: Log Ajax, Rest, Admin, Cron, favicon, OK
- Set how to alert: Mailadress, intervals for rotating and deleting logfiles
- History tab: show latest logged requests
- Digest tab: browse and review past aggregated requests
- Actions tab: practical guidance on what to do when you receive an alert
- Memory Thresholds tab: current settings and assessment & recommendations
- Check Installation tab: all ok for using this plugin?
- Clean uninstall: removes all options, cron jobs, and log files on deletion
- New Logo for the Plugin
PluginCheck-Plugin Status
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.
Credits
Copyright 2009–2013 by Alex Rabe, 2022– Bernhard Kux
Screenshots
Dashboard widget – Memory Overview with progress bar and digest summary,show latest digest status badges (warn / danger / critical) 
Threshold Alerts settings tab – thresholds, logging options, email options… 
History tab – recent requests with context 
Digest tab – summary review 
Memory Thresholds tab – show current settings, assessment & recommendations 
Check Installation tab – can the plugin work correctly? 
Admin footer – memory usage, PHP version, and IP address on every admin page
FAQ
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Where is the memory usage displayed?
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The plugin shows memory information in three places: in the WordPress dashboard as a “Memory Overview” widget, in the admin footer on every backend page and in detail at the plugins tabs.
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What information does the plugin display?
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The plugin shows the PHP version, operating system, WordPress and PHP memory limits, current memory usage (in MB and as a percentage), as well as the server IP address and PHP max execution time.
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How can I find out which request consumes the most memory?
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Switch on the logging options in the plugins tabs and measure the memory consumption. the Digests tab will show you the memory-hungry requests. Then you might switch off plugins to see the difference.
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Does the plugin work with WordPress Multisite?
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Yes.
Reviews
Contributors & Developers
“WP-Memory-Usage” is open source software. The following people have contributed to this plugin.
Contributors
“WP-Memory-Usage” has been translated into 7 locales. Thank you to the translators for their contributions.
Translate “WP-Memory-Usage” into your language.
Interested in development?
Browse the code, check out the SVN repository, or subscribe to the development log by RSS.
Changelog
2.0.0
- New: Admin-Backend Tab Settings, History, Digest, Actions, Memory Thresholds, Check Installation
- Improved: Dashboard widget shows latest digest status badges (warn / danger / critical)
- New: Logo
- Removed: Manual “Multiple Memory Measurement”
1.2.12
- NEW: Provide data for server monitoring via API
- The plugin is compatible with PluginCheck Version 1.8.0
1.2.11
- Plugin ok with WP 6.9
- Compatible with PluginCheck Version 1.7.0
1.2.10
- Ok with WordPress 6.5.4
- PluginCheckPlugin Version 1.0.1 ok, except trademarked_term
- Changes to pass PluginCheckPlugin: escaping output, gmdate() instead of date()
1.2.9
- BUGFIX: Fixed calculating “Average MB”, which could cause “PHP Deprecated” warning. Thank you @dimalifragis.
- Ok with WordPress 6.4.3 and 6.5-RC
1.2.8
- Fixed situation when WP_MEMORY_LIMIT or WP_MAX_MEMORY_LIMIT is not set, which gives a PHP-Warning when using PHP 8.X. Thank you @PowerMan
- Improved I18N. Thank you @alexclassroom