Ravi Ranjan Jha created SOLR-18186:
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Summary: Solr heap used percentage uses committed heap instead of
max heap which raises false alarm
Key: SOLR-18186
URL: https://issues.apache.org/jira/browse/SOLR-18186
Project: Solr
Issue Type: Bug
Security Level: Public (Default Security Level. Issues are Public)
Components: Admin UI
Affects Versions: 9.10.1, 10.0
Reporter: Ravi Ranjan Jha
Attachments: image-2026-04-01-15-52-26-883.png,
image-2026-04-01-15-54-29-256.png
Solr heap used percentage uses committed heap instead of max heap. Ideally it
should use configured max heap size for the calculation.
At this point, it causes unnecessary concern to the users can see a high
percentage in red even for low heap usage.
As an example in this image it shows the heap usage as 89% in red for 6.9 GB
usage because committed memory is 7.6 GB but the actually configured max heap
(-Xmx) is 12GB. This computation should use configured max heap size of 12 GB
instead which will show the actual status of the node heap usage.
!image-2026-04-01-15-52-26-883.png!
!image-2026-04-01-15-54-29-256.png!
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