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Posted to commits@pinot.apache.org by GitBox <gi...@apache.org> on 2021/06/10 17:22:27 UTC
[GitHub] [incubator-pinot] mayankshriv opened a new pull request #7041: Change default value for `max.parallel.segment.builds`.
mayankshriv opened a new pull request #7041:
URL: https://github.com/apache/incubator-pinot/pull/7041
## Description
We have noticed a lot of instances where realtime consumption runs into issues that trace
back to OOMs related to segment builds. One major contributing factor for this is the
maximum number of parallel segment builds allowed, which defaults to 0, which essentially
means upto number of partitions. More often than not, this is not a good default, especially
for folks who are experiment with Pinot and may have large number of partitions to consume from.
While there's no one value that can satisfy all use cases, the intent here is to limit on a
more reasonable size as opposed to unlimited to number of partitions.
## Upgrade Notes
Does this PR prevent a zero down-time upgrade? (Assume upgrade order: Controller, Broker, Server, Minion)
* [ ] Yes (Please label as **<code>backward-incompat</code>**, and complete the section below on Release Notes)
Does this PR fix a zero-downtime upgrade introduced earlier?
* [ ] Yes (Please label this as **<code>backward-incompat</code>**, and complete the section below on Release Notes)
Does this PR otherwise need attention when creating release notes? Things to consider:
- New configuration options
- Deprecation of configurations
- Signature changes to public methods/interfaces
- New plugins added or old plugins removed
* [ ] Yes (Please label this PR as **<code>release-notes</code>** and complete the section on Release Notes)
## Release Notes
<!-- If you have tagged this as either backward-incompat or release-notes,
you MUST add text here that you would like to see appear in release notes of the
next release. -->
<!-- If you have a series of commits adding or enabling a feature, then
add this section only in final commit that marks the feature completed.
Refer to earlier release notes to see examples of text.
-->
## Documentation
<!-- If you have introduced a new feature or configuration, please add it to the documentation as well.
See https://docs.pinot.apache.org/developers/developers-and-contributors/update-document
-->
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[GitHub] [incubator-pinot] codecov-commenter commented on pull request #7041: Change default value for `max.parallel.segment.builds`.
Posted by GitBox <gi...@apache.org>.
codecov-commenter commented on pull request #7041:
URL: https://github.com/apache/incubator-pinot/pull/7041#issuecomment-858919478
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@@ Coverage Diff @@
## master #7041 +/- ##
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Complexity 12 12
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Files 1453 1453
Lines 72013 72013
Branches 10428 10428
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- Misses 15667 21506 +5839
+ Partials 3537 3403 -134
```
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[GitHub] [incubator-pinot] mayankshriv merged pull request #7041: Change default value for `max.parallel.segment.builds`.
Posted by GitBox <gi...@apache.org>.
mayankshriv merged pull request #7041:
URL: https://github.com/apache/incubator-pinot/pull/7041
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[GitHub] [incubator-pinot] mcvsubbu commented on pull request #7041: Change default value for `max.parallel.segment.builds`.
Posted by GitBox <gi...@apache.org>.
mcvsubbu commented on pull request #7041:
URL: https://github.com/apache/incubator-pinot/pull/7041#issuecomment-859152832
> LGTM. @mcvsubbu I believe LinkedIn limits the parallelism of the segment commit, can you please take a look? Also do you have suggestion on the default value?
Yes, we do limit the number of builds to 4. It is as good a default as anything else.
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