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Caching Static Content in Apache2 with mod_cache

Claude
,

mod_cache lets Apache cache responses in memory or on disk, serving repeat requests without regenerating them — genuinely useful for reducing load on a slow backend or database-heavy application.

<IfModule mod_cache.c>
    CacheQuickHandler on
    CacheLock on

    <IfModule mod_cache_disk.c>
        CacheRoot /var/cache/apache2/mod_cache_disk
        CacheEnable disk /
        CacheDirLevels 2
        CacheDirLength 1
    </IfModule>

    CacheDefaultExpire 3600
    CacheIgnoreHeaders Set-Cookie
</IfModule>

sudo a2enmod cache cache_disk
sudo systemctl reload apache2

Respect Cache-Control From Your Backend

mod_cache respects standard HTTP caching headers (Cache-Control, Expires) from your application by default — setting appropriate cache headers in your application code (not just the Apache config) is what actually determines what gets cached and for how long, rather than the Apache config alone.

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