# Cache for Replica Metadata objects
#
# This cache keeps some metadata objects in memory,
# so we don't always have to load from the database.
#
# Cache Keys: Record Type UUID (string)
# Cache Values: Read-Only Record Replica Metadata objects, stored as POJOs

appian.cacheattributes.cacheName=recordReplicaMetadataCache
appian.cacheattributes.distributionMode=LOCAL_WITH_DISTRIBUTED_CLEAR

# Cache algorithm is LIRS
appian.cacheattributes.MemoryCacheName=com.appiancorp.cache.JavaCachingSystemLirs

# Maximum number of cached objects at any given time
#
# We have chosen a target capacity of 1000 entries to approximately correspond with the cache of record type
# definitions. At time of writing, a single metadata object stores four Longs (8*4=32B),
# five UUIDs (37*5=185B), and two sets of attributes, which are Strings containing lists of UUIDs, bounded by
# the number of fields on the corresponding record type (max 100). The size is 37B per field UUID * stored a
# number of times each (assume 4x) that depends on the usage of the metadata.
# So, in terms of total bytes, we're talking about 148B per field plus an overhead of 217B. This gives us
# around 3.8 KB for a single metadata object tracking 25 record type fields, for a total cache size of
# probably less 5 MB on average.

appian.cacheattributes.MaxObjects=1000

# Background memory shrinkage (active eviction)
#
# Run memory shrinker once an hour
# Evict entries that have been idle for two hours

appian.cacheattributes.ShrinkerIntervalSeconds=3600
appian.cacheattributes.MaxMemoryIdleTimeSeconds=7200