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https://issues.apache.org/jira/browse/BEAM-4468?focusedWorklogId=202879&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-202879
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ASF GitHub Bot logged work on BEAM-4468:
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Author: ASF GitHub Bot
Created on: 22/Feb/19 21:18
Start Date: 22/Feb/19 21:18
Worklog Time Spent: 10m
Work Description: lostluck commented on issue #7927: [BEAM-4468] Go SDK
Combiner Optimizations
URL: https://github.com/apache/beam/pull/7927#issuecomment-466551156
I'm pulling back the invocation optimization since there's something I'm
missing there.
Run Go PostCommit
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Issue Time Tracking
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Worklog Id: (was: 202879)
Time Spent: 1h (was: 50m)
> Go SDK-Tune in memory pre-combine caching for Lifted Combines.
> --------------------------------------------------------------
>
> Key: BEAM-4468
> URL: https://issues.apache.org/jira/browse/BEAM-4468
> Project: Beam
> Issue Type: Improvement
> Components: sdk-go
> Reporter: Robert Burke
> Assignee: Robert Burke
> Priority: Minor
> Time Spent: 1h
> Remaining Estimate: 0h
>
> Requires [BEAM-4276|https://issues.apache.org/jira/browse/BEAM-4276] to be
> completed first.
> Additional performance tweaks to the in memory per-key accumulator cache
> during the pre-combine phase of a lifted combine.
> This can include any of
> * capping the number of key-accumulator in the cache, and draining them
> eagerly after x elements seen, or evicting keys by some heuristic after the
> cache has seen X distinct keys.
> * providing a counter on cache size (key/element counts) exposable through
> the metrics interface or another runner standard counter, to permit observing
> the cache's status, especially if it could grow without bound within a bundle.
>
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