Ye Zihao created IMPALA-10971:
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Summary: Data cache metrics count error when LIRS is enabled
Key: IMPALA-10971
URL: https://issues.apache.org/jira/browse/IMPALA-10971
Project: IMPALA
Issue Type: Bug
Components: Backend
Affects Versions: Impala 4.0.0
Reporter: Ye Zihao
Attachments: image-2021-10-18-14-15-52-422.png
When LIRS is enabled, impala-server.io-mgr.remote-data-cache-total-bytes may
give a wrong value because of INSTANT EVICTIONS. When INSTANT EVICTIONS occur,
the total bytes decreases due to EvictedEntry, and no corresponding increase
due to failure of insert, so the total bytes becomes smaller and smaller, or
even negative.
!image-2021-10-18-14-15-52-422.png!
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