Web & Application Servers

PHP-FPM Monitoring

Monitor PHP-FPM process pools, slow requests, memory usage, and worker states in real time with zero configuration.

Why monitor PHP-FPM?

PHP-FPM (FastCGI Process Manager) handles PHP request processing for millions of web applications. Monitoring PHP-FPM is essential to detect slow scripts, manage process pool sizing, prevent memory exhaustion, and maintain application responsiveness.

Auto-discovery via Xitogent

Process pool active/idle/total workers

Slow request detection and tracking

Memory usage per pool

Request duration metrics

Listen queue monitoring

Multi-pool support

1-minute metric collection intervals

Metrics

What we monitor

Active Processes

Currently processing PHP requests.

Idle Processes

Workers waiting for requests.

Slow Requests

Requests exceeding slow_log threshold.

Listen Queue

Requests waiting for a free worker.

Max Children Reached

Times process limit was hit.

Memory per Process

Average memory per PHP-FPM worker.

Request Duration

Average request processing time.

Total Processes

Total spawned PHP-FPM workers.

Triggers & Alerts

Configurable alert triggers

Set up custom triggers in your dashboard to get notified the moment PHP-FPM metrics cross your defined thresholds.

PHP-FPM monitoring trigger configuration dashboard

Slow Requests

warning

Fires when slow request count exceeds threshold.

Listen Queue

critical

Triggers when requests are queuing, indicating insufficient workers.

Max Children

critical

Alerts when process limit is reached repeatedly.

Memory Usage

warning

Fires on high per-process memory usage.

Active Processes

warning

Triggers when all workers are busy.

Importance of PHP-FPM Monitoring

PHP powers 77% of websites. Without monitoring, slow scripts, memory leaks, and worker exhaustion can bring applications to a halt.

Detect slow PHP scripts before they impact users
Right-size process pools based on real data
Prevent memory exhaustion from leaky scripts
Monitor listen queue to avoid request drops

Why Choose Xitoring

Seamless PHP-FPM monitoring with zero-config setup and multi-pool support.

One-command install
Multi-pool monitoring support
Unified dashboard
Multi-channel alerting
Historical data retention

Before you start

Prerequisites for PHP-FPM

Make sure you've got these in place — most installs are a 60-second job once they are.

PHP-FPM with pm.status_path = /fpm/status and ping.path = /fpm/ping set in the pool config
The status URL accessible from localhost (via Nginx/Apache fastcgi_pass)
Read access to PHP-FPM logs and pool config

Setup Guide

Get started in minutes

Install Xitogent on your web server

Install the lightweight Xitogent monitoring agent on the host running PHP-FPM.

curl -s https://xitoring.com/install.sh | sudo bash -s -- --key=YOUR_API_KEY

Enable the PHP-FPM status page

Set `pm.status_path = /fpm/status` and `ping.path = /fpm/ping` in your pool config (typically `/etc/php/X.Y/fpm/pool.d/www.conf`). Add a fastcgi_pass location block in Nginx (or equivalent for Apache) to expose the path to localhost, then reload PHP-FPM and verify the URL responds.

# In your PHP-FPM pool config (e.g. /etc/php/8.x/fpm/pool.d/www.conf)
pm.status_path = /fpm/status
ping.path = /fpm/ping

# Then in Nginx, expose them to localhost:
location ~ ^/fpm/(status|ping)$ {
  allow 127.0.0.1;
  deny  all;
  fastcgi_pass   unix:/var/run/php-fpm/www.sock;
  include        fastcgi_params;
}

Enable the PHP-FPM integration

Use the Xitoring dashboard or CLI to enable the PHP-FPM integration. Xitogent auto-detects every FPM pool on the host and tracks them independently.

sudo xitogent integrate

Configure alert thresholds (optional)

Set custom thresholds for Slow Requests, Listen Queue, or Max Children Reached to catch performance regressions and pool exhaustion before users feel them.

Verify it's working

Run this command on the server to confirm Xitogent picked up the integration. Fresh metrics will start streaming to your dashboard within ~30 seconds.

sudo xitogent status

Compare

Considering alternatives?

See how Xitoring stacks up against the alternatives for PHP-FPM monitoring — flat pricing, deeper integrations, and one agent that covers your whole stack.