[ https://issues.apache.org/jira/browse/CASSANDRA-8231?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Benjamin Lerer updated CASSANDRA-8231: -------------------------------------- Attachment: CASSANDRA-8231-V2.txt Same patch as the previous with the renamed license file for Jamm. > Wrong size of cached prepared statements > ---------------------------------------- > > Key: CASSANDRA-8231 > URL: https://issues.apache.org/jira/browse/CASSANDRA-8231 > Project: Cassandra > Issue Type: Bug > Components: Core > Reporter: Jaroslav Kamenik > Assignee: Benjamin Lerer > Fix For: 2.1.3 > > Attachments: 8231-notes.txt, CASSANDRA-8231-V2.txt, > CASSANDRA-8231.txt, Unsafes.java > > > Cassandra counts memory footprint of prepared statements for caching > purposes. It seems, that there is problem with some statements, ie > SelectStatement. Even simple selects is counted as 100KB object, updates, > deletes etc have few hundreds or thousands bytes. Result is that cache - > QueryProcessor.preparedStatements - holds just fraction of statements.. > I dig a little into the code, and it seems that problem is in jamm in class > MemoryMeter. It seems that if instance contains reference to class, it counts > size of whole class too. SelectStatement references EnumSet through > ResultSet.Metadata and EnumSet holds reference to Enum class... -- This message was sent by Atlassian JIRA (v6.3.4#6332)