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From "T Jake Luciani (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CASSANDRA-5033) Keep intransit mutation tracking off heap
Date Wed, 05 Dec 2012 21:05:58 GMT
T Jake Luciani created CASSANDRA-5033:
-----------------------------------------

             Summary: Keep intransit mutation tracking off heap
                 Key: CASSANDRA-5033
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5033
             Project: Cassandra
          Issue Type: New Feature
          Components: Core
    Affects Versions: 1.1.0
            Reporter: T Jake Luciani


When a node is down and writes are timing out to that node the coordinator keeps the mutation
in memory and writes out the hint on timeout.  

The problem is under heavy write load these mutations pile up quite a bit (when CL is low).
 It causes a lot of heap pressure and causes a lot of problems (which shouldn't happen just
because a node is down)

If we serialized the mutation and put it in a off heap cache vs on head we could avoid this
problem.

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