Caching plugins conflicting
- Caching
Problem Summary
Multiple caching plugins can conflict, overriding each other’s settings, causing duplicate headers, cache stampede, or completely broken caching. Only one caching solution should be active.
Performance Impact
- Broken caching: Plugins interfere with each other
- Duplicate headers: Conflicting cache directives
- Server errors: Conflicts cause 500 errors
- Unpredictable behavior: Cache works intermittently
How to Detect
- Plugin list: Check for multiple caching plugins
- Headers check: Duplicate or conflicting headers
- Error logs: Plugin conflicts in debug.log
Solutions
1. Choose One Caching Plugin
- WP Rocket (easiest)
- W3 Total Cache (most features)
- WP Super Cache (simple)
2. Use Server-Level Caching
Nginx fastcgi_cache or similar instead of plugins.
3. Disable All Caching Plugins
Test with no caching plugins first.
4. Check for Caching in Other Plugins
Some security or optimization plugins include caching.