[ https://issues.apache.org/jira/browse/CASSANDRA-5661?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13708209#comment-13708209 ]
Ben Manes commented on CASSANDRA-5661: -------------------------------------- Profiled to reduce allocations, cutting out about 10ms in a caliper benchmark. The dominating factor in a profile are reads from the cache. > Discard pooled readers for cold data > ------------------------------------ > > Key: CASSANDRA-5661 > URL: https://issues.apache.org/jira/browse/CASSANDRA-5661 > Project: Cassandra > Issue Type: Bug > Components: Core > Affects Versions: 1.2.1 > Reporter: Jonathan Ellis > Assignee: Pavel Yaskevich > Fix For: 2.0 > > Attachments: CASSANDRA-5661-multiway-per-sstable.patch, > CASSANDRA-5661.patch, CASSANDRA-5661-v2-global-multiway-per-sstable.patch, > DominatorTree.png, Histogram.png > > > Reader pooling was introduced in CASSANDRA-4942 but pooled > RandomAccessReaders are never cleaned up until the SSTableReader is closed. > So memory use is "the worst case simultaneous RAR we had open for this file, > forever." > We should introduce a global limit on how much memory to use for RAR, and > evict old ones. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira