[jira] [Updated] (HDDS-4570) Reduce memory footprint of OMUpdateEventBatch for Recon when processing OM update events

["Siyao Meng (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HDDS-4570?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Siyao Meng updated HDDS-4570:
-----------------------------
    Summary: Reduce memory footprint of OMUpdateEventBatch for Recon when processing OM update events  (was: Reduce memory footprint of OMUpdateEventBatch for Recon)

> Reduce memory footprint of OMUpdateEventBatch for Recon when processing OM update events
> ----------------------------------------------------------------------------------------
>
>                 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
>            Priority: Major
>
> 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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