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

[Anton Vinogradov (Jira)]

Ivan Rakov created IGNITE-4958:
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             Summary: 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: Alexey Goncharuk


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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