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https://issues.apache.org/jira/browse/IGNITE-29277?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Nikita Amelchev updated IGNITE-29277:
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Description: {{MaxExplicitLockHoldTime}} reports only the longest hold time
among the explicit locks currently held, and {{ExplicitLockHoldTimeHistogram}}
accounts for a lock only after it is released, which its name does not say. So
there is no way to see how many locks are being held for too long right now: a
single forgotten lock cannot be told apart from a mass leak, and an alert
cannot be set on the number of such locks. A histogram of hold times of the
currently held locks is needed, with the two histograms named as a pair,
{{CurrentExplicitLockHoldTime}} and {{{}ReleasedExplicitLockHoldTime{}}},
before the existing one is first released. (was: {{MaxExplicitLockHoldTime}}
reports only the longest hold time among the explicit locks currently held, and
{{ExplicitLockHoldTimeHistogram}} accounts for a lock only after it is
released. So there is no way to see how many locks are being held for too long
right now: a single forgotten lock cannot be told apart from a mass leak, and
an alert cannot be set on the number of such locks. A histogram of hold times
of the currently held locks would show it, with the threshold of a long-held
lock configured as the histogram bound.)
> Add a histogram of currently held explicit locks
> ------------------------------------------------
>
> Key: IGNITE-29277
> URL: https://issues.apache.org/jira/browse/IGNITE-29277
> Project: Ignite
> Issue Type: Task
> Reporter: Nikita Amelchev
> Assignee: Nikita Amelchev
> Priority: Major
> Fix For: 2.20
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> {{MaxExplicitLockHoldTime}} reports only the longest hold time among the
> explicit locks currently held, and {{ExplicitLockHoldTimeHistogram}} accounts
> for a lock only after it is released, which its name does not say. So there
> is no way to see how many locks are being held for too long right now: a
> single forgotten lock cannot be told apart from a mass leak, and an alert
> cannot be set on the number of such locks. A histogram of hold times of the
> currently held locks is needed, with the two histograms named as a pair,
> {{CurrentExplicitLockHoldTime}} and {{{}ReleasedExplicitLockHoldTime{}}},
> before the existing one is first released.
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