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Vladimir Rodionov commented on HBASE-14496: ------------------------------------------- {quote} What if memory pressure causes many small flushes? How does this interact with the max number of store files? {quote} Should be increased from default value. > Compaction improvements: Delayed compaction in RatioBasedCompactionPolicy > ------------------------------------------------------------------------- > > Key: HBASE-14496 > URL: https://issues.apache.org/jira/browse/HBASE-14496 > Project: HBase > Issue Type: New Feature > Reporter: Vladimir Rodionov > Assignee: Vladimir Rodionov > Attachments: HBASE-14496.v1.patch, HBASE-14496.v2.patch > > > Delayed compaction feature for RatioBasedCompactionPolicy allows to specify > maximum compaction delay for newly created store files. Files will be > eligible for compaction only if their age exceeds this delay. This will allow > to preserve new data in a block cache. For most applications, the newer the > data is the more frequently it is accessed. The frequent compactions of a new > store files result in high block cache churn rate and affects read > performance and read latencies badly. > The configuration will be global, per table, per column family. -- This message was sent by Atlassian JIRA (v6.3.4#6332)