[ https://issues.apache.org/jira/browse/IMPALA-5669?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Gabor Kaszab reassigned IMPALA-5669: ------------------------------------ Assignee: Adam Tamas > Partial sort node should have a maximum reservation set by default. > ------------------------------------------------------------------- > > Key: IMPALA-5669 > URL: https://issues.apache.org/jira/browse/IMPALA-5669 > Project: IMPALA > Issue Type: Improvement > Components: Backend > Affects Versions: Impala 2.10.0 > Reporter: Thomas Tauber-Marshall > Assignee: Adam Tamas > Priority: Major > Labels: performance, ramp-up, resource-management > > A change currently in review, IMPALA-5498, adds a new exec node > PartialSortNode. Initially, it will just allocate memory up to the query > memory limit, but once the new buffer management work in IMPALA-3200 goes in, > it should be modified to operate within a memory constraint. > PartialSortNode can operate with essentially any amount of memory, with the > tradeoff that a smaller limit leads to a "lower quality", more random sort. > We should investigate the performance implications of different limits, and > consider making the limit configurable. -- This message was sent by Atlassian Jira (v8.3.4#803005) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-all-unsubscr...@impala.apache.org For additional commands, e-mail: issues-all-h...@impala.apache.org