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From "Daniel Doubleday (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-2868) Native Memory Leak
Date Mon, 11 Jul 2011 10:45:59 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-2868?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13063280#comment-13063280
] 

Daniel Doubleday commented on CASSANDRA-2868:
---------------------------------------------

Hm after 3 days checking a node that does not use mmaped files it looks like this:

nativelib: 14128
locale-archive: 1492
ffiSwFShY(deleted): 8
javajar: 2292
[anon]: 3609388
[stack]: 132
java: 44
7008: 32
jna534482390478104336.tmp: 92

Total RSS: 3627608
Total SST: 0


Compared to start RSS increased by ~400MM. So it seems that this is not related to mem mapping.

We will deploy CASSANDRA-2654 this week. Will see if that changes anything but I suspect not
...

> Native Memory Leak
> ------------------
>
>                 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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