Antal Sinkovits created HIVE-25080:
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Summary: Create metric about oldest entry in "ready for cleaning"
state
Key: HIVE-25080
URL: https://issues.apache.org/jira/browse/HIVE-25080
Project: Hive
Issue Type: Bug
Reporter: Antal Sinkovits
Assignee: Antal Sinkovits
When a compaction txn commits, COMPACTION_QUEUE.CQ_COMMIT_TIME is updated with
the current time. Then the compaction state is set to "ready for cleaning".
(... and then the Cleaner runs and the state is set to "succeeded" hopefully)
Based on this we know (roughly) how long a compaction has been in state "ready
for cleaning".
We should create a metric similar to compaction_oldest_enqueue_age_in_sec that
would show that the cleaner is blocked by something i.e. find the compaction in
"ready for cleaning" that has the oldest commit time.
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