Tool Spotlight
PHP-FPM Calculator - Optimize PHP-FPM Configuration for Your Server
Generate optimal PHP-FPM configuration based on server RAM and application type. Calculate pm.max_children and spare servers with 18+ framework presets (WordPress, Laravel, Magento). Pair with MySQL Calculator for complete server optimization and compare VPS performance benchmarks.
Key Features
- Calculate optimal pm.max_children
- Memory usage estimation
- 18+ framework presets
- Dynamic vs static mode recommendations
- Performance tuning suggestions
Use Cases
- WordPress performance optimization
- Laravel server tuning
- Magento configuration
- VPS resource optimization
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PHP-FPM Calculator
Generate optimal PHP-FPM configuration based on your server RAM and application type. Calculate pm.max_children, spare servers, and memory allocation with industry-standard formulas.
Quick Presets
CMS Platforms
Frameworks
Lightweight Apps
Micro Frameworks
E-Commerce
API Servers
Custom / Other
Configuration
Dynamic mode adapts the number of workers to traffic and suits most workloads.
Server RAM available to the instance.
Allocate for OS, database, cache, and other services.
Retain headroom to prevent out-of-memory issues.
Preset value for the selected app.
Preset value for the selected app.
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Frequently Asked Questions
What is PHP-FPM and why does configuration matter?
PHP-FPM (FastCGI Process Manager) manages PHP worker processes that handle web requests. Proper configuration prevents memory exhaustion and ensures optimal performance. Use this calculator alongside MySQL Calculator for complete server optimization, and verify your setup on VPS benchmarks.
How do I determine the right pm.max_children value?
Calculate based on available RAM divided by average process memory. This tool provides safe recommendations with safety margins. Monitor actual usage with the provided commands, and compare performance across different VPS providers using our comparison tool.
What's the difference between dynamic, static, and ondemand?
Dynamic adapts workers to traffic (recommended), static maintains fixed workers (high traffic), and ondemand spawns workers as needed (low traffic). Choose based on your traffic patterns and server resources. Use Port Scanner to verify your web server is accessible and SSL Checker for security.
How can I monitor PHP-FPM performance on my VPS?
Use the monitoring commands provided in the results section to track process memory and status. Combine with MySQL monitoring for database performance and review your dashboard metrics to identify optimization opportunities across your VPS infrastructure.
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About & Support
About PHP-FPM Calculator
This calculator estimates safe PHP-FPM pool settings using a buffer and safety factor so that your workers stay within available memory. Adjust the inputs to match your environment and review warnings before applying changes.
Formula: Usable RAM = (Total RAM - Reserved RAM) × (1 - buffer%). Max Children = floor(Usable RAM / Average Process MB) × safety factor. Expected Usage = Max Children × Average Process MB. Safety Margin = Usable RAM - Expected Usage.
