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Memcached Object Cache

开发者	ryan sivel andy nacin barry ethitter nickdaugherty batmoo simonwheatley jenkoian bor0 aidvu
更新时间	2022年11月8日 21:17
PHP版本:	5.6.20 及以上
WordPress版本:	6.1

标签

cache memcached

下载

2.0.2 2.0.5 4.0.0 3.0.0 3.0.1 3.0.2 3.2.0 3.2.2 2.0.4 2.0.6 2.0 2.0.1 2.0.3

详情介绍:

Memcached Object Cache provides a persistent backend for the WordPress object cache. A memcached server and the PECL memcache extension are required.

安装:

Install memcached on at least one server. Note the connection info. The default is 127.0.0.1:11211.
Install the PECL memcache extension
Copy object-cache.php to wp-content
Add the WP_CACHE_KEY_SALT constant to the wp-config.php: php define( 'WP_CACHE_KEY_SALT', '...long random string...' );

This helps prevent cache pollution when multiplte WordPress installs are using the same Memcached server. The value must be unique for each WordPress install.

常见问题:

How can I manually specify the memcached server(s)?

Add something similar to the following to wp-config.php above /* That's all, stop editing! Happy blogging. */: $memcached_servers = array( 'default' => array( '10.10.10.20:11211', '10.10.10.30:11211' ) ); The top level array keys, are cache groups, where 'default' corresponds to any cache group that is not explicitly defined. This allows for specifying memcached servers that only handle certain cache groups. The most common use is only specifying 'default'. Possible cache groups are: {$taxonomy}_relationships {$meta_type}_meta {$taxonomy}_relationships blog-details blog-id-cache blog-lookup bookmark calendar category comment counts general global-posts options plugins post_ancestors post_meta posts rss site-lookup site-options site-transient terms themes timeinfo transient user_meta useremail userlogins usermeta users userslugs widget

更新日志:

4.0.0

Add preemptive filter pre_wp_cache_get
Add flush_number replication to prevent accidental flush due to flush_number eviction, server rotation, etc.

3.2.2

Remove filter, and base key stripping on presence of key_salt

3.2.1

Fix bug allowing slow-ops entries to have the same key, so toggling doesn't work

3.2.0

Better stats(). Now shows cache group/individual calls with size of the payload and timings.
PHP 5.6.20 is now required
Fix get_multi to show per group calls
Added filter (memcached_strip_keys) to bypass memcached key stripping
Special group for slow-ops ( > 5ms ) with backtrace

3.1.0

Add wp_cache_get_multi
Add support for the $found parameter
Set a variable for $max_expiration to 30 days
Code style changes
Different coloring for unknown stats group
Store host/port on failure_callback
Default stats counts

3.0.2

Better output of HTML

3.0.1

Fix key generation error in switch_to_blog()

3.0.0

Flush site cache by rotating keys
Flush global cache when flushing main site

2.0.6

Flush the local cache on wp_cache_flush()

2.0.5

Fix missing global in switch_to_blog

2.0.4

Remove deprecated constructor

2.0.3

Support for unix sockets

2.0.2

Break references by cloning objects
Keep local cache in sync with memcached when using incr and decr
Handle limited environments where is_multisite() is not defined
Fix setting and getting 0
PHP 5.2.4 is now required
Use the WP_CACHE_KEY_SALT constant if available to guarantee uniqueness of keys