You are viewing a plain text version of this content. The canonical link for it is here.

Posted to dev@ignite.apache.org by "Ivan Rakov (JIRA)" <ji...@apache.org> on 2019/01/30 18:54:00 UTC

[jira] [Created] (IGNITE-11156) FreeLists are overflowed with pages with almost no free space left

Ivan Rakov created IGNITE-11156:
-----------------------------------

             Summary: FreeLists are overflowed with pages with almost no free space left
                 Key: IGNITE-11156
                 URL: https://issues.apache.org/jira/browse/IGNITE-11156
             Project: Ignite
          Issue Type: Improvement
            Reporter: Ivan Rakov
            Assignee: Ivan Rakov
             Fix For: 2.8


{code:java}
    /** */
    private static final int MIN_PAGE_FREE_SPACE = 8;
{code}
If data pages has 8 free bytes or more, it will be stored in a free list. As result, free lists mostly contain "free pages" that are actually useless: pair of (boolean, boolean) takes approximately 50 bytes. I think, we'll increase this constant to something like 40, memory will be used more efficiently in result and WAL usage will decrease.



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)