[infinispan-issues] [JBoss JIRA] (ISPN-7019) Need better docs for memory-based eviction

Need better docs for memory-based eviction ------------------------------------------ Key: ISPN-7019 URL: https://issues.jboss.org/browse/ISPN-7019 Project: Infinispan Issue Type: Task Reporter: John Sanda Assignee: William Burns Priority: Minor In order to use memory based eviction, cache entries have to be stored as binary, e.g., {noformat} <infinispan> <cache-container default-cache="default"> <transport cluster="HawkularMetrics"/> <distributed-cache name="rawData" mode="ASYNC" > <groups enabled="true"/> <store-as-binary/> <eviction size="2576980377" strategy="LRU" type="MEMORY"/> <persistence passivation="true"> <leveldb-store path="/tmp/hawkular-metrics/jni/raw/data" shared="false" preload="false"> <expiration path="/tmp/hawkular-metrics/jni/raw/expired"/> <compression type="NONE" /> <implementation type="JAVA"/> <write-behind/> </leveldb-store> </persistence> </distributed-cache> </cache-container> </infinispan> {noformat} Without the {{store-as-binary}}, you get exceptions like: {noformat} java.lang.IllegalArgumentException: Size of Class class org.hawkular.metrics.core.service.cache.MetricKey cannot be determined using given entry size calculator :class org.infinispan.container.entries.MarshalledValueEntrySizeCalculator at org.infinispan.container.entries.PrimitiveEntrySizeCalculator.handleObject(PrimitiveEntrySizeCalculator.java:91) ~[infinispan-core-8.1.0.Final.jar:8.1.0.Final] {noformat} when trying to store cache entries. This configuration setting should be more clearly documented and/or have the exception mention it as well.