What is Hosting Cache? How to Configure and Clear Cache 2026
Caching is one of the most powerful techniques for improving website performance. By storing copies of data in faster-accessible locations, caching dramatically reduces load times for returning visitors and reduces the load on your hosting server. Understanding the different types of caching and how to configure them correctly can transform your site's performance.
Types of Caching
Browser Cache
Browsers store local copies of CSS, JavaScript, images, and other static files. When users return to your site, these assets load from their local drive instead of being downloaded again — much faster, and reduces server load significantly.
Server Cache / Page Cache
The server stores pre-rendered HTML pages. When the same URL is requested again, the server delivers the cached HTML immediately instead of regenerating it from scratch. This eliminates PHP processing and database queries for each visit.
Object Cache
Stores database query results in memory (Redis, Memcached). When the same query is requested again, results are retrieved from memory rather than querying the database. This can make database operations hundreds of times faster.
CDN Cache
Content Delivery Networks store static file copies on servers around the world. Users receive files from the nearest server, drastically reducing latency for visitors in different geographic locations.
Configuring Browser Cache via .htaccess
<IfModule mod_expires.c>
ExpiresActive On
ExpiresByType text/css "access plus 1 year"
ExpiresByType application/javascript "access plus 1 year"
ExpiresByType image/jpeg "access plus 1 year"
ExpiresByType image/png "access plus 1 year"
ExpiresByType image/webp "access plus 1 year"
ExpiresByType image/svg+xml "access plus 1 year"
ExpiresByType text/html "access plus 0 seconds"
</IfModule>This sets 1-year cache for all static files while keeping HTML uncached (so content is always fresh).
WordPress Cache Plugins
- W3 Total Cache: Most comprehensive — page cache, browser cache, object cache, CDN integration.
- WP Super Cache: Simplest setup, great for beginners.
- WP Rocket: Paid (~$59/year) but easiest configuration with the most features.
- LiteSpeed Cache: Free, best performance on LiteSpeed servers.
When and How to Clear Cache
Situations requiring cache clearing:
- After updating content, CSS, or JavaScript
- After deploying new code
- When users report seeing outdated content
- After fixing bugs
Clearing Cache in WordPress
- W3 Total Cache: Performance → Purge All Caches
- WP Super Cache: Settings → WP Super Cache → Delete Cache
- WP Rocket: Rocket icon in toolbar → Clear Cache
Frequently Asked Questions
How much can caching improve website speed?
Page cache typically reduces TTFB (Time to First Byte) from 500ms+ to under 100ms. Browser caching can reduce repeat visit load times by 50-80%. Combined cache layers can make sites 3-10x faster for returning visitors.
Can caching cause users to see outdated content?
Yes, if cache TTL is too long and you don't clear cache after publishing updates. Set appropriate TTLs (long for static assets, short or zero for dynamic content) and always clear cache after significant content updates.
If I use Cloudflare, do I still need server-side caching?
Yes. Cloudflare provides CDN-level caching but server cache is still valuable. They operate at different levels: Cloudflare = global CDN reducing latency, server cache = reducing origin server load even for traffic Cloudflare doesn't cache.
How much disk space does caching use?
Depends on site size, but page cache for typical sites uses 100MB-1GB. Monitor your hosting storage and configure cache expiry to automatically clean old cached files.