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Posted to issues@ozone.apache.org by "Siyao Meng (Jira)" <ji...@apache.org> on 2020/12/09 18:27:00 UTC

[jira] [Created] (HDDS-4570) Reduce memory footprint of OMUpdateEventBatch for Recon

Siyao Meng created HDDS-4570:
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             Summary: Reduce memory footprint of OMUpdateEventBatch for Recon
                 Key: HDDS-4570
                 URL: https://issues.apache.org/jira/browse/HDDS-4570
             Project: Hadoop Distributed Data Store
          Issue Type: Improvement
            Reporter: Siyao Meng
            Assignee: Siyao Meng


We are experiencing OOM when Recon heap size is too small (1GB) and it looks like {{OMUpdateEventBatch#events}} is taking most of them.

Goal:
1. Reduce new object creation when Recon is consuming batches OM events ({{consumeOMEvents}})
2. Improve {{OMUpdateEventBatch#filter}} to reduce memory usage. e.g. avoid generating a new list?



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