# Performance Tuning

https://docs.wisecp.com/es/performance-tuning

A WISECP installation that feels slow is usually held back by one of a few things: caching turned off, an overloaded scheduler, records nobody cleans up, or PHP settings left at their defaults. Each has its own screen.

## Opening the Screens

The settings that affect speed sit in three places: caching under [Advanced Settings](https://docs.wisecp.com/en/advanced-settings), scheduler and retention under [Automation Settings](https://docs.wisecp.com/en/automation-settings) on the System tab, and the measured state of the installation under [System Health](https://docs.wisecp.com/en/system-health).

## What Affects Speed

- **Cache (Memory System)**: Keeps repeated catalogue, menu and pricing results instead of rebuilding them per visit. The single biggest setting on a busy site.
- **PHP OPcache**: A server setting rather than a panel one. It keeps compiled PHP in memory and is worth having on every installation.
- **Worker scaling**: How much scheduled work runs at once. Too low and the queue falls behind; too high and the server competes with itself.
- **Retention**: How long finished job records, logs and temporary files are kept. Tables that grow forever make every list slower.

## Tasks

### Turn Caching On

1. Open Advanced Settings and switch **Cache (Memory System)** on.
2. Save, then load a catalogue page twice and compare how it feels.

Result: repeated queries are served from the cache instead of the database. Editing a product or menu clears what it affects, so the site does not serve stale content.

### Match the Scheduler to the Server

1. Open Automation Settings and go to the System tab.
2. Look at the recent jobs list first. A queue that keeps up needs no change.
3. Only if work is piling up, raise worker scaling one step and watch again.

### Keep the Tables Small

Set retention on the System tab so finished job records and temporary files are cleared on a schedule. This is the difference between a panel that stays fast for a year and one that gets slower every month.

## Things to Watch

> **Measure before you change anything**
> 
> Raising worker scaling on a server that is already at its limit makes things worse, not better. Look at System Health and the recent jobs list first, change one thing, then look again.

> **Caching off is a development setting**
> 
> It exists so a developer sees every change immediately. Left off on a live site it means every visitor pays for work that could have been done once.

> **"Slow panel" is often a missing cron job**
> 
> When invoices, renewals or orders seem stuck, the problem is usually that scheduled tasks are not running at all rather than running slowly. Check that first; it costs a minute and rules out the most common cause.

## Related Articles

- [Setting Up Scheduled Tasks](https://docs.wisecp.com/en/scheduled-tasks-setup)
- [Automation Settings](https://docs.wisecp.com/en/automation-settings)
- [Advanced Settings](https://docs.wisecp.com/en/advanced-settings)
- [System Health](https://docs.wisecp.com/en/system-health)