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Posted to issues@iceberg.apache.org by GitBox <gi...@apache.org> on 2022/05/20 02:32:44 UTC
[GitHub] [iceberg] lirui-apache opened a new issue, #4822: ParallelIterator is using too much memory
lirui-apache opened a new issue, #4822:
URL: https://github.com/apache/iceberg/issues/4822
ParallelIterator launches multiple threads to read manifest files and store the entries in an unbounded queue. For large tables (~ 2 million data files in our example), planning files can easily lead to full GC or OOM, especially when column stats is included.
We verified that switching to a bounded blocking queue can solve the problem.
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[GitHub] [iceberg] szehon-ho commented on issue #4822: ParallelIterator is using too much memory
Posted by GitBox <gi...@apache.org>.
szehon-ho commented on issue #4822:
URL: https://github.com/apache/iceberg/issues/4822#issuecomment-1136512731
Looks like same issue as reported : https://github.com/apache/iceberg/pull/4596
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[GitHub] [iceberg] github-actions[bot] closed issue #4822: ParallelIterator is using too much memory
Posted by GitBox <gi...@apache.org>.
github-actions[bot] closed issue #4822: ParallelIterator is using too much memory
URL: https://github.com/apache/iceberg/issues/4822
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[GitHub] [iceberg] github-actions[bot] commented on issue #4822: ParallelIterator is using too much memory
Posted by GitBox <gi...@apache.org>.
github-actions[bot] commented on issue #4822:
URL: https://github.com/apache/iceberg/issues/4822#issuecomment-1338428008
This issue has been closed because it has not received any activity in the last 14 days since being marked as 'stale'
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[GitHub] [iceberg] lirui-apache commented on issue #4822: ParallelIterator is using too much memory
Posted by GitBox <gi...@apache.org>.
lirui-apache commented on issue #4822:
URL: https://github.com/apache/iceberg/issues/4822#issuecomment-1132396666
By analyzing the heap dump, we also noticed some memory inefficiency regarding how column stats is stored. E.g. object overhead ratio is high because there's a map for each single metric.
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[GitHub] [iceberg] github-actions[bot] commented on issue #4822: ParallelIterator is using too much memory
Posted by GitBox <gi...@apache.org>.
github-actions[bot] commented on issue #4822:
URL: https://github.com/apache/iceberg/issues/4822#issuecomment-1321286939
This issue has been automatically marked as stale because it has been open for 180 days with no activity. It will be closed in next 14 days if no further activity occurs. To permanently prevent this issue from being considered stale, add the label 'not-stale', but commenting on the issue is preferred when possible.
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