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From "Roman Kondakov (JIRA)" <j...@apache.org>
Subject [jira] [Created] (IGNITE-10694) MVCC: Possible recycled pages leak.
Date Fri, 14 Dec 2018 14:28:00 GMT
Roman Kondakov created IGNITE-10694:

             Summary: 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

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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