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From "Denis Magda (JIRA)" <j...@apache.org>
Subject [jira] [Created] (IGNITE-7470) Eviction policy for SQL on-heap row cache
Date Thu, 18 Jan 2018 19:48:02 GMT
Denis Magda created IGNITE-7470:
-----------------------------------

             Summary: Eviction policy for SQL on-heap row cache
                 Key: IGNITE-7470
                 URL: https://issues.apache.org/jira/browse/IGNITE-7470
             Project: Ignite
          Issue Type: New Feature
          Components: sql
    Affects Versions: 2.4
            Reporter: Denis Magda


SQL on-heap row cache was introduced in Ignite 2.4:

[https://apacheignite-sql.readme.io/v2.3/docs/performance-and-debugging_24_hidden#sql-on-heap-row-cache]

The cache can occupy as much RAM as allocated and used for off-heap data regions. If a user
stores dozens or hundreds of gigabytes in the data regions the on-heap row cache will become
enormous and the cluster will suffer from atrocious GC pauses.

Let's come up with an eviction policy for this cache. 



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