Manual:objectcache table
(Redirected from Objectcache table)
↑ Manual:Contents | MediaWiki database layout | objectcache table |
MediaWiki version: | ≥ 1.3 |
The objectcache table is the default backend for the Main Stash service, and is also used by a small number of high-impact cache operations as fallback when no other cache backend is configured (e.g. Memcached ). Its content can be safely deleted and excluded from backups as it will be regenerated when needed.
See Object cache for how this cache is used and how it can be configured.
Fields
editkeyname
editUnique identifier of the cached object. e.g. <instance>:user:id:<userid>
value
editCached object.
exptime
editDate the cache entry should be expired (in seconds), and therefore removed.
modtoken
editMediaWiki version: | ≥ 1.37 |
?
flags
editMediaWiki version: | ≥ 1.37 |
?
Schema summary
editMediaWiki version: | ≥ 1.37 Gerrit change 666780 |
DESCRIBE objectcache;
+----------+------------------+------+-----+-------------------+-------+ | Field | Type | Null | Key | Default | Extra | +----------+------------------+------+-----+-------------------+-------+ | keyname | varbinary(255) | NO | PRI | | | | value | mediumblob | YES | | NULL | | | exptime | binary(14) | NO | MUL | NULL | | | modtoken | varbinary(17) | NO | | 00000000000000000 | | | flags | int(10) unsigned | YES | | NULL | | +----------+------------------+------+-----+-------------------+-------+
MediaWiki version: | 1.36 Gerrit change 636049 |
DESCRIBE objectcache;
+---------+----------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +---------+----------------+------+-----+---------+-------+ | keyname | varbinary(255) | NO | PRI | | | | value | mediumblob | YES | | NULL | | | exptime | binary(14) | NO | MUL | NULL | | +---------+----------------+------+-----+---------+-------+
MediaWiki versions: | 1.10 – 1.35 |
DESCRIBE objectcache;
+---------+----------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +---------+----------------+------+-----+---------+-------+ | keyname | varbinary(255) | NO | PRI | | | | value | mediumblob | YES | | NULL | | | exptime | datetime | YES | MUL | NULL | | +---------+----------------+------+-----+---------+-------+
MediaWiki versions: | 1.3 – 1.9 |
DESCRIBE objectcache;
+---------+------------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +---------+------------------+------+-----+---------+-------+ | keyname | char(255) binary | NO | PRI | NULL | | | value | mediumblob | YES | | NULL | | | exptime | datetime | YES | MUL | NULL | | +---------+------------------+------+-----+---------+-------+