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https://issues.apache.org/jira/browse/HDDS-15931?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated HDDS-15931:
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Labels: pull-request-available (was: )
> Remove usage of internal netty metrics
> --------------------------------------
>
> Key: HDDS-15931
> URL: https://issues.apache.org/jira/browse/HDDS-15931
> Project: Apache Ozone
> Issue Type: Sub-task
> Reporter: Chung-En Lee
> Assignee: Huang Kuan Hao
> Priority: Major
> Labels: pull-request-available
>
> It would be better to not use netty internal `maxDirectMemory` and
> `usedDirectMemory` in NettyMetrics#getMetrics.
> `usedDirectMemory` can be replaced by netty public api. For example:
> ```
> public long getUsedDirectMemory() {
> ByteBufAllocator allocator = ByteBufAllocator.DEFAULT;
> if (allocator instanceof ByteBufAllocatorMetricProvider)
> { ByteBufAllocatorMetric metric = ((ByteBufAllocatorMetricProvider)
> allocator).metric(); return metric.usedDirectMemory(); }
> return -1L;
> }
> ```
> `maxDirectMemory` depends on system property and jvm setting.
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