SRD75

Once the Memory Usage Monitor plugin is activated, activating or deactivating any other plugin will display the memory used by that plugin. e.g:
Memory usage for WP Memory: 0.02 MB
For accurate memory usage breakdown for each plugin, you must activate or deactivate them individually; you will not see memory usage when bulk activating plugins.

Memory Usage Monitor

Displays memory/RAM usage for each plugin as they are activated and deactivated.

Francis Smith

View your PHP error log, CPU and RAM usage, and view disk space all in one location. This is a new plugin under development. Currently it does not do terribly much, but we are constantly working on adding new and useful features.
Why use this plugin instead of the many others? ServerMonitor does not use PHP’s shell_exec, which is disabled by many web hosts for security concerns. Currently this plugin only supports Linux servers. Windows Server support is planned, but is a low priority.
For any bug reports or suggestions, let me know in the plugins support forum.

ServerMonitor

A simple plugin to view server resource usage (ram, cpu, disk), check your PHP error log, and more.

Memory Usage Monitor vs ServerMonitor