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From "Maxim Muzafarov (Jira)" <j...@apache.org>
Subject [jira] [Updated] (IGNITE-10694) MVCC: Possible recycled pages leak.
Date Thu, 03 Oct 2019 10:00:01 GMT

     [ https://issues.apache.org/jira/browse/IGNITE-10694?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Maxim Muzafarov updated IGNITE-10694:
-------------------------------------
    Fix Version/s:     (was: 2.8)
                   2.9

> MVCC: Possible recycled pages leak.
> -----------------------------------
>
>                 Key: IGNITE-10694
>                 URL: https://issues.apache.org/jira/browse/IGNITE-10694
>             Project: Ignite
>          Issue Type: Bug
>          Components: mvcc
>            Reporter: Roman Kondakov
>            Priority: Major
>              Labels: mvcc_stability
>             Fix For: 2.9
>
>
> Let's consider the following scenario: put N items to cache and then remove all these
N items. If you repeat this scenario two times, you expect that the same number of pages will
be recycled each time. But for enabled MVCC this is not the case. Reproducers:
> * {{PageEvictionPagesRecyclingAndReusingTest#testPagesRecyclingAndReusingMvccTxPartitioned}}
> * {{PageEvictionPagesRecyclingAndReusingTest#testPagesRecyclingAndReusingMvccTxReplicated}}
> Perhaps this is because the vacuum does not clean deleted rows completely. Detailed investigation
is needed.



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