Manual:objectcacheテーブル

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objectcache テーブル

MediaWiki バージョン:

≧ 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.

フィールド

keyname

Unique identifier of the cached object. e.g. <instance>:user:id:<userid>

value

Cached object.

exptime

Date the cache entry should be expired (in seconds), and therefore removed.

modtoken

MediaWiki バージョン:

≧ 1.37

?

flags

MediaWiki バージョン:

≧ 1.37

?

スキーマの要約

MediaWiki バージョン:

≧ 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 バージョン:

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 バージョン:

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 バージョン:

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    |       |
+---------+------------------+------+-----+---------+-------+