[jira] [Comment Edited] (IGNITE-4958) Make data pages recyclable into index/meta/etc pages and vice versa

["Ivan Rakov (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/IGNITE-4958?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16456256#comment-16456256 ] 

Ivan Rakov edited comment on IGNITE-4958 at 4/27/18 11:32 AM:
--------------------------------------------------------------

[~cyberdemon], I've left some comments in the upsource review. Please, take a look.
[~agoncharuk], I have concerns about whether should we add new delta records for saving rotated ID part; please see my comments in the review. What do you think?
I also think that we should add new test that covers massive migration of pages from data to index types and vice versa.


was (Author: ivan.glukos):
[~cyberdemon], I've left some comments in the upsource review. Please, take a look.
[~agoncharuk], I have concerns about whether should we add new delta records for saving rotated ID part; what do you think?
I also think that we should add new test that covers massive migration of pages from data to index types and vice versa.

> Make data pages recyclable into index/meta/etc pages and vice versa
> -------------------------------------------------------------------
>
>                 Key: IGNITE-4958
>                 URL: https://issues.apache.org/jira/browse/IGNITE-4958
>             Project: Ignite
>          Issue Type: Improvement
>          Components: cache
>    Affects Versions: 2.0
>            Reporter: Ivan Rakov
>            Assignee: Dmitriy Sorokin
>            Priority: Major
>             Fix For: 2.6
>
>
> Recycling for data pages is disabled for now. Empty data pages are accumulated in FreeListImpl#emptyDataPagesBucket, and can be reused only as data pages again. What has to be done:
> * Empty data pages should be recycled into reuse bucket
> * We should check reuse bucket first before allocating a new data page
> * MemoryPolicyConfiguration#emptyPagesPoolSize should be removed



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