<b>This week in caching: Redis object cache for WordPress, honestly</b>

<b>This week in caching: Redis object cache for WordPress, honestly</b>
For the WP crowd running a persistent object cache:
— <i>Object cache vs page cache (they're not the same)</i> — object cache memoizes DB queries inside a request and across requests; page cache stores whole HTML. You usually want both.
— <i>The alloptions bomb</i> — how a bloated wp_options autoload set turns Redis into a bottleneck, with the SQL to find your worst offenders.
— <i>Redis Object Cache vs Object Cache Pro</i> — what the paid fork actually buys you (relay, better serialization, analytics).
— <i>Flushing safely on deploy</i> — why wp cache flush mid-traffic can stampede your DB.
Credits to Till Krüss and the Pressidium engineering blog.
Bookmark: the alloptions audit query — gold for WP folks whose Redis looks busy for no reason.