Openfire uses caches to improve performance. Caches can be configured to hold more or less objects in memory and also the amount of time an object will be kept in memory. Big caches can improve performance but very big caches may decrease it since more memory will be used and Java may have to work hard to make room for other objects in memory. In summary, the proper size of the cache should be estimated for each installation based on the number of concurrent users, the roster size, vCard size, number of groups, etc.
Openfire does not provide the option to configure cache properties from the admin console in an easy way. For now you have to create new system properties in the admin console and set the required value. After changing a cache property you will need to restart the server so that the change is actually used.
These are the names of the properties that you can define and configure. The *.size properties define the max size in bytes the cache may be. The *.maxLifetime defines the default max lifetime of the cache, in milliseconds.?
More caches are defined in http://www.igniterealtime.org/fisheye/browse/svn-org/openfire/trunk/src/java/org /jivesoftware/util/cache/CacheFactory.java?r=trunk
| Cache | Size | Expiration |
|---|---|---|
| vCard | cache.vcardCache.size | cache.vcardCache.maxLifetime |
| User | cache.userCache.size | cache.userCache.maxLifetime |
| Existence of remote users | cache.remoteUsersCache.size | cache.remoteUsersCache.maxLifetime |
| Roster | cache.username2roster.size | cache.username2roster.maxLifetime |
| Group | cache.group.size | cache.group.maxLifetime |
| Group Users | cache.userGroup.size | cache.userGroup.maxLifetime |
| Privacy List | cache.listsCache.size | cache.listsCache.maxLifetime |
| Support of XEP-133 by remote servers | cache.multicast.size | cache.multicast.maxLifetime |
| Offline Message | cache.offlinemessage.size | cache.offlinemessage.maxLifetime |
| POP3 auth users | cache.pop3.size | cache.pop3.maxLifetime |
| File Transfer | cache.fileTransfer.size | cache.fileTransfer.maxLifetime |
| LDAP | cache.ldap.size | cache.ldap.maxLifetime |
Some values are set in http://fisheye.igniterealtime.org/browse/openfire/trunk/src/java/org/jivesoftwar e/util/cache/DefaultLocalCacheStrategy.java?hb=true
The information below contains the settings for Openfire 3.7.1.
Default values for size is 256 KB and lifetime 6 hours.
| cache.fileTransfer.size | 128 * 1024 |
| cache.fileTransfer.maxLifetime | 1000 * 60 * 10 |
| cache.multicast.size | 128 * 1024 |
| cache.multicast.maxLifetime | JiveConstants.DAY |
| cache.offlinemessage.size | 100 * 1024 |
| cache.offlinemessage.maxLifetime | JiveConstants.HOUR * 12 |
| cache.pop3.size | 512 * 1024 |
| cache.pop3.maxLifetime | JiveConstants.HOUR |
| cache.transferProxy.size | -1 |
| cache.transferProxy.maxLifetime | 1000 * 60 * 10 |
| cache.group.size | 1024 * 1024 |
| cache.group.maxLifetime | JiveConstants.MINUTE * 15 |
| cache.groupMeta.size | 512 * 1024 |
| cache.groupMeta.maxLifetime | JiveConstants.MINUTE * 15 |
| cache.javascript.size | 128 * 1024 |
| cache.javascript.maxLifetime | 3600 * 24 * 10 |
| cache.ldap.size | 512 * 1024 |
| cache.ldap.maxLifetime | JiveConstants.HOUR * 2 |
| cache.listsCache.size | 512 * 1024 |
| cache.offlinePresence.size | 512 * 1024 |
| cache.lastActivity.size | 128 * 1024 |
| cache.userCache.size | 512 * 1024 |
| cache.userCache.maxLifetime | JiveConstants.MINUTE * 30 |
| cache.remoteUsersCache.size | 512 * 1024 |
| cache.remoteUsersCache.maxLifetime | JiveConstants.MINUTE * 30 |
| cache.vcardCache.size | 512 * 1024 |
| cache.faviconHits.size | 128 * 1024 |
| cache.faviconMisses.size | 128 * 1024 |
| cache.routeServer.size | -1 |
| cache.routeServer.maxLifetime | -1 |
| cache.routeComponent.size | -1 |
| cache.routeComponent.maxLifetime | -1 |
| cache.routeUser.size | -1 |
| cache.routeUser.maxLifetime | -1 |
| cache.routeAnonymousUser.size | -1 |
| cache.routeAnonymousUser.maxLifetime | -1 |
| cache.routeUserSessions.size | -1 |
| cache.routeUserSessions.maxLifetime | -1 |
| cache.componentsSessions.size | -1 |
| cache.componentsSessions.maxLifetime | -1 |
| cache.connManagerSessions.size | -1 |
| cache.connManagerSessions.maxLifetime | -1 |
| cache.incServerSessions.size | -1 |
| cache.incServerSessions.maxLifetime | -1 |
| cache.sessionsHostname.size | -1 |
| cache.sessionsHostname.maxLifetime | -1 |
| cache.secretKeys.size | -1 |
| cache.secretKeys.maxLifetime | -1 |
| cache.validatedDomains.size | -1 |
| cache.validatedDomains.maxLifetime | -1 |
| cache.directedPresences.size | -1 |
| cache.directedPresences.maxLifetime | -1 |
| cache.serverFeatures.size | -1 |
| cache.serverFeatures.maxLifetime | -1 |
| cache.serverItems.size | -1 |
| cache.serverItems.maxLifetime | -1 |
| cache.serversConfigurations.size | 128 * 1024 |
| cache.serversConfigurations.maxLifetime | JiveConstants.MINUTE * 30 |