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Phabricator commented on HBASE-5347: ------------------------------------ mbautin has resigned from the revision "[HBASE-5347] [jira] GC free memory management in Level-1 Block Cache". We are not actively pursuing this approach anymore due to non-reproducibility of GC issues. REVISION DETAIL https://reviews.facebook.net/D1635 > GC free memory management in Level-1 Block Cache > ------------------------------------------------ > > Key: HBASE-5347 > URL: https://issues.apache.org/jira/browse/HBASE-5347 > Project: HBase > Issue Type: Improvement > Reporter: Prakash Khemani > Assignee: Prakash Khemani > Attachments: D1635.5.patch > > > On eviction of a block from the block-cache, instead of waiting for the > garbage collecter to reuse its memory, reuse the block right away. > This will require us to keep reference counts on the HFile blocks. Once we > have the reference counts in place we can do our own simple > blocks-out-of-slab allocation for the block-cache. > This will help us with > * reducing gc pressure, especially in the old generation > * making it possible to have non-java-heap memory backing the HFile blocks -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira