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perf(2meet-data-optimizer): flush the cold cache group without a server-side scan

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- TMDO_Cache_Layer::flush_group() bumps the post type's cold cache version
  (option wpdo_cold_cache_version) instead of wp_cache_flush_group(), which
  Redis Object Cache runs as one server-side scan that blocks Redis on a large
  group; entries under older keys expire by their TTL
- TMDO_Zone_Cold::cache_key() builds every cold blob key; version 0 keeps the
  current keys, so upgrading invalidates nothing
- Verify: CacheLayerTest (new keys, no scan, other post types untouched),
  unit 702, integration 583, phpcs, stan
- PR: PR-110
This commit is contained in:
wpdev
2026-09-27 17:12:14 +08:00
parent 06a3594417
commit eb1c8b78f4
3 changed files with 54 additions and 17 deletions
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includes/class-tmdo-cache-layer.php
+12 -12
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@@ -49,7 +49,7 @@ class TMDO_Cache_Layer {
// Check which IDs are already cached.
$uncached = array();
foreach ( $post_ids as $pid ) {
$cached = wp_cache_get( "cold_{$pid}", $group );
$cached = wp_cache_get( TMDO_Zone_Cold::cache_key( (int) $pid, $post_type ), $group );
if ( false === $cached ) {
$uncached[] = (int) $pid;
}
@@ -94,7 +94,7 @@ class TMDO_Cache_Layer {
// Cache all results (including empty arrays for posts with no cold data).
foreach ( $uncached as $pid ) {
$data = $fetched[ $pid ] ?? array();
wp_cache_set( "cold_{$pid}", $data, $group, $ttl );
wp_cache_set( TMDO_Zone_Cold::cache_key( $pid, $post_type ), $data, $group, $ttl );
}
}
@@ -114,7 +114,7 @@ class TMDO_Cache_Layer {
// Force a fresh read from DB (bypasses cache).
$group = 'wpdo_cold_' . sanitize_key( $post_type );
wp_cache_delete( "cold_{$post_id}", $group );
wp_cache_delete( TMDO_Zone_Cold::cache_key( $post_id, $post_type ), $group );
// Re-read will populate cache.
TMDO_Zone_Cold::get_blob( $post_id, $post_type );
@@ -136,18 +136,18 @@ class TMDO_Cache_Layer {
/**
* Flush all cold cache for a post type.
*
* Useful after bulk imports or schema changes.
* Useful after bulk imports or schema changes. Bumps the post type's cache
* version (new keys from now on) instead of wp_cache_flush_group(), which
* Redis Object Cache runs as one server-side scan that blocks Redis on a
* large group; older entries expire by their TTL.
*
* @param string $post_type Post type to flush.
*/
public static function flush_group( string $post_type ): void {
$group = 'wpdo_cold_' . sanitize_key( $post_type );
if ( function_exists( 'wp_cache_flush_group' ) ) {
wp_cache_flush_group( $group );
}
// If wp_cache_flush_group is not available (older WP or no object cache),
// individual entries will expire via TTL.
$versions = get_option( TMDO_Zone_Cold::CACHE_VERSION_OPTION, array() );
$versions = is_array( $versions ) ? $versions : array();
$versions[ $post_type ] = (int) ( $versions[ $post_type ] ?? 0 ) + 1;
update_option( TMDO_Zone_Cold::CACHE_VERSION_OPTION, $versions, true );
}
/**
@@ -183,7 +183,7 @@ class TMDO_Cache_Layer {
return array(
'groups' => $groups,
'prefetch_support' => true,
'flush_support' => function_exists( 'wp_cache_flush_group' ),
'flush_support' => true,
);
}