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From Tyler Hobbs <ty...@datastax.com>
Subject Re: virtual memory of all cassandra-nodes is growing extremly since Cassandra 1.1.0
Date Wed, 25 Jul 2012 17:06:57 GMT
Are you actually seeing any problems from this? High virtual memory usage
on its own really doesn't mean anything. See
http://wiki.apache.org/cassandra/FAQ#mmap

On Wed, Jul 25, 2012 at 1:21 AM, Thomas Spengler <
thomas.spengler@toptarif.de> wrote:

> No one has any idea?
>
> we tryed
>
> update to 1.1.2
> DiskAccessMode standard, indexAccessMode standard
> row_cache_size_in_mb: 0
> key_cache_size_in_mb: 0
>
>
> Our next try will to change
>
> SerializingCacheProvider to ConcurrentLinkedHashCacheProvider
>
> any other proposals are welcom
>
> On 07/04/2012 02:13 PM, Thomas Spengler wrote:
> > Hi @all,
> >
> > since our upgrade form cassandra 1.0.3 to 1.1.0 the virtual memory usage
> > of the cassandra-nodes explodes
> >
> > our setup is:
> > * 5 - centos 5.8 nodes
> > * each 4 CPU's and 8 GB RAM
> > * each node holds about 100 GB on data
> > * each jvm's uses 2GB Ram
> > * DiskAccessMode is standard, indexAccessMode is standard
> >
> > The memory usage grows upto the whole memory is used.
> >
> > Just for information, as we had cassandra 1.0.3, we used
> > * DiskAccessMode is standard, indexAccessMode is mmap
> > * and the ram-usage was ~4GB
> >
> >
> > can anyone help?
> >
> >
> > With Regards
> >
>
>
> --
> Thomas Spengler
> Chief Technology Officer
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>


-- 
Tyler Hobbs
DataStax <http://datastax.com/>

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