Load.php

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<?php
 
namespace Rsi\Fred\Health\Check;
 
class Load extends \Rsi\Fred\Health\Check{
 
  public $interval = 1; //!< Measurement interval (minutes; 1, 5, or 15).
  public $limit = null; //!< Maximum load (empty = no warning; just register).
  public $message = 'High server load [load] ([load1]/[load5]/[load15])'; //!< Message when over limit.
 
  public function check(&$message = null){
    $message = null;
    $load = array_combine([1,5,15],sys_getloadavg());
    $value = $load[$this->interval] ?? null;
    if($this->limit && ($value > $this->limit))
      $message = strtr($this->message,['[load]' => $value] + array_combine(['[load1]','[load5]','[load15]'],$load));
    return $value;
  }
 
}