[jira] [Assigned] (HIVE-16992) LLAP: better default lambda for LRFU policy
[ https://issues.apache.org/jira/browse/HIVE-16992?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Sergey Shelukhin reassigned HIVE-16992: --- Assignee: Sergey Shelukhin (was: Gopal V) > LLAP: better default lambda for LRFU policy > --- > > Key: HIVE-16992 > URL: https://issues.apache.org/jira/browse/HIVE-16992 > Project: Hive > Issue Type: Bug >Reporter: Sergey Shelukhin >Assignee: Sergey Shelukhin >Priority: Major > > LRFU is currently skewed heavily towards LRU; there are 10k-s or 100k-s of > buffers tracked during a typical workload, but the heap size is around 700. > We should see if making it closer to LFU (by tweaking the lambda) will > improve hit rate with small queries infrequently interleaved with large > scans; and whether it will have negative effects due to perf overhead. -- This message was sent by Atlassian JIRA (v7.6.3#76005)
[jira] [Assigned] (HIVE-16992) LLAP: better default lambda for LRFU policy
[ https://issues.apache.org/jira/browse/HIVE-16992?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Gopal V reassigned HIVE-16992: -- Assignee: Gopal V > LLAP: better default lambda for LRFU policy > --- > > Key: HIVE-16992 > URL: https://issues.apache.org/jira/browse/HIVE-16992 > Project: Hive > Issue Type: Bug >Reporter: Sergey Shelukhin >Assignee: Gopal V > > LRFU is currently skewed heavily towards LRU; there are 10k-s or 100k-s of > buffers tracked during a typical workload, but the heap size is around 700. > We should see if making it closer to LFU (by tweaking the lambda) will > improve hit rate with small queries infrequently interleaved with large > scans; and whether it will have negative effects due to perf overhead. -- This message was sent by Atlassian JIRA (v6.4.14#64029)
