Native Memory Leak
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                 Key: CASSANDRA-2868
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-2868
             Project: Cassandra
          Issue Type: Bug
          Components: Core
    Affects Versions: 0.7.6
            Reporter: Daniel Doubleday
            Priority: Minor


We have memory issues with long running servers. These have been confirmed by 
several users in the user list. That's why I report.

The memory consumption of the cassandra java process increases steadily until 
it's killed by the os because of oom (with no swap)

Our server is started with -Xmx3000M and running for around 23 days.

pmap -x shows

Total SST: 1961616 (mem mapped data and index files)
Anon  RSS: 6499640
Total RSS: 8478376

This shows that > 3G are 'overallocated'.

We will use BRAF on one of our less important nodes to check wether it is 
related to mmap and report back.

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