Memcached Backend (Object Cache)
- Caches queries, not page
- Typical WordPress queries:
- bloginfo() options (site title, description, language, theme stylesheet URL)
- post or page title and contents
- sidebar widgets
- Store cached pages in memcached
- Reduces disk I/O load
We touched on the use of batcache last we spoke. I would like to know as much as possible about how we have implemented batcache, issues encountered, solutions, as much as possible.
Batcache Implementation is fairly easy
- Download latest version http://downloads.wordpress.org/plugin/batcache.1.0.zip-
- Upload advanced-cache.php to the /wp-content/ directory
- Add this line the top of wp-config.php to activate Batcache: define(‘WP_CACHE’, true);
- Tweak the options near the top of advanced-cache.php
- Optionally, upload batcache.php to /wp-content/plugins/ directory.
- Issues encountered – none really, works as it is intended to.
XCACHE (Opcode Caching)
- compiled PHP cache stored in memory
- Alternatives available (eAccellerator and APC), XCACHE works best with PHP-FPM and WordPress