Real-time CPU load monitoring with percentage bars, load averages, and cross-platform detection for Linux and Windows environments.

CPU Monitoring

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The CPU Monitoring feature provides real-time visibility into your server's processing load directly from the Version Info settings page.

What It Displays

  • Current CPU Usage - Displayed as a percentage bar with color-coded thresholds
  • Load Averages - 1-minute, 5-minute, and 15-minute load averages
  • CPU Core Count - The number of available CPU cores on the server

How Detection Works

Version Info uses a cross-platform Provider system to detect CPU data:

Platform Detection Method
Linux / Unix sys_getloadavg() PHP function
Windows COM object via Winmgmts:// (WMI) when available

Some shared hosting providers disable the sys_getloadavg() function for security reasons. If this function is unavailable, the CPU monitoring section will display a message indicating that CPU data could not be retrieved. Contact your hosting provider to inquire about enabling this function.

Understanding Load Averages

Load averages represent the average number of processes waiting for CPU time over the specified interval:

  • 1-minute average - Most responsive to recent changes
  • 5-minute average - Smoothed short-term trend
  • 15-minute average - Long-term baseline

A load average equal to your core count means the CPU is fully utilized. Values above the core count indicate processes are queuing for CPU time.

Caching

CPU data is cached using WordPress Transients for 60 seconds by default. The cache is refreshed automatically via the Heartbeat API.

Developers can adjust the cache duration:

add_filter( 'version_info_cache_ttl', function ( int $seconds ): int {
    return 120; // Cache for 2 minutes instead of 1
} );