Properties

Each ApisHive instance contains a dedicated Apis Chronical database. The configuration properties for each Apis Chronical database is available on the "Apis Event Server" node for the ApisHive instance in Apis Management Studio.

The following properties are available:

NameDescriptionDefault valueAccess
LoglevelSpecifies the verbosity of logmessages produced by the eventserver.WarningsRW
RunmodeEither "Online", "Admin", or "Offline". In "Online" mode, the database is running normally. In "Admin" mode, database metadata can be modified, but events will not be processed or stored. In "Offline" mode, the database is closed and only the runmode property can be modified.OnlineRW
Database horizonNumber of days to keep event history. The value -1 means "Forever", and the value "0" means that no history will be stored. A value of e.g. 365 means that one year of event history will be stored in the database.0RW
Datafile periodThe time-period covered by each datafile, in steps from 7.2 minutes to 0.9 years. This setting affects the number of datafiles and the size of each datafile in the database.1.5 weeksR
Archive block sizeEach datafile consist of one or more archives, and this setting controls the size of the archive block header.16KBRW
Event block sizeEach datafile archive consist of one or more eventblocks, and this setting controls the size of new, uncompressed eventblocks256KBRW
Event block countNumber of events per event block1024RW
Event block compressionLZ4 acceleration level for datafile event blocks4RW
Cache queue sizeSize of the event cache queue (number of events). When modified, the new setting takes effect after a restart of Apis Hive.16384RW
Cache block countNumber of blocks in the cache file16R
Cache block sizeSize of each block in the cache file4MBR
Cache flush intervalNumber of milliseconds between each flush-operation on the cache file10000RW
Monitor queue sizeSize of the event monitor queue (number of events). When modified, the new setting takes effect for new event subscriptions.4096RW
Persist stateEnables/disables persisting of the current event state at shutdownDisabledRW
Persist state intervalNumber of milliseconds between each state snapshot10000RW