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From "Ivan Rakov (JIRA)" <j...@apache.org>
Subject [jira] [Created] (IGNITE-4959) Possible slight memory leak in free list
Date Thu, 13 Apr 2017 14:56:41 GMT
Ivan Rakov created IGNITE-4959:
----------------------------------

             Summary: Possible slight memory leak in free list
                 Key: IGNITE-4959
                 URL: https://issues.apache.org/jira/browse/IGNITE-4959
             Project: Ignite
          Issue Type: Improvement
          Components: cache
    Affects Versions: 2.0
            Reporter: Ivan Rakov
            Assignee: Alexey Goncharuk


To reproduce, run PageEvictionMultinodeTest (any eviction mode), set ENTRIES to Integer.MAX_VALUE.
Observations:
1) After a few minutes of test running, number of allocated pages looks like a constant (a
bit more than eviciton threshold, 90% by default). This is expected behaviour with enabled
page eviction.
2) More precise measurement shows that there's slow linear growth of allocated pages number,
literally 10-20 pages per minute.
3) Number of pages with type T_PAGE_LIST_NODE grows, number of all other pages remains constant.
4) Though, total number of pages in free list remains constant (with minor fluctuations).
We have to find out whether this process has a saturation point, after which pages number
stop growing. Otherwise, it's a memory leak and should be fixed.



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