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https://issues.apache.org/jira/browse/DRILL-7924?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17543578#comment-17543578
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James Turton commented on DRILL-7924:
-------------------------------------
[~philstellar] sorry about the very late response. If you hover over the Direct
Memory Usage help icon you'll see that current direct memory usage is reported
as a percentage of peak usage. I'm not sure why it was done that way, but it is
normal for a newly launched Drillbit to report 0GiB out of 0GiB for this stat.
> Drill Memory Issues in Kubernetes
> ---------------------------------
>
> Key: DRILL-7924
> URL: https://issues.apache.org/jira/browse/DRILL-7924
> Project: Apache Drill
> Issue Type: Bug
> Components: Client - HTTP, Functions - Drill
> Affects Versions: 1.18.0
> Reporter: Philip Lane
> Priority: Major
> Attachments: image-2021-05-10-15-50-03-469.png
>
>
> {{I am specifying a DRILLBIT_MAX_PROC_MEM}} of {{9G}}, a {{DRILL_HEAP}} of
> {{4G}}, and a {{DRILL_MAX_DIRECT_MEMORY}} of {{4G}} and allowing Drill to
> determine the {{DRILLBIT_CODE_CACHE_SIZE}}. When I review the Drill startup
> logs, I can see that Drill is trying to use those values:
> {{ drill-pod [INFO[] Attempting to start up Drill with the following
> settings}}
> {{ drill-pod DRILL_HEAP=4G}}
> {{ drill-pod DRILL_MAX_DIRECT_MEMORY=4G}}
> {{ drill-pod DRILLBIT_CODE_CACHE_SIZE=768m}}
> {{ drill-pod [WARN[] Total Memory Allocation for Drillbit (8GB) exceeds
> available free memory (3GB)}}
> {{ drill-pod [WARN[] Drillbit will start up, but can potentially crash due
> to oversubscribing of system memory.}}
> {{ drill-pod Starting drillbit, logging to /opt/drill/log/drillbit.out}}
> {{ drill-pod [INFO[] Attempting to start up Drill with the following
> settings}}
> {{ drill-pod DRILL_HEAP=4G}}
> {{ drill-pod DRILL_MAX_DIRECT_MEMORY=4G}}
> {{ drill-pod DRILLBIT_CODE_CACHE_SIZE=768m}}
> {{ drill-pod [WARN[] Total Memory Allocation for Drillbit (8GB) exceeds
> available free memory (3GB)}}
> {{ drill-pod [WARN[] Drillbit will start up, but can potentially crash due
> to oversubscribing of system memory.}}
> {{ drill-pod drillbit is running.}}
> {{But when it is running, the UI doesn't match for the Direct memory and
> instead indicates that 0GB of memory is available:}}
> !image-2021-05-10-15-50-03-469.png!
> Note that the errors in the log citing memory allocation exceeds available
> free memory is irrelevant - I get the same issue when I don't get that error.
> What can I do to check if this is a UI bug or if Drill really is allocating
> 0GB to the Direct Memory despite being told to use 4GB? Any idea how I can
> fix it if it really is happening?
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