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From Thomas Spengler <thomas.speng...@toptarif.de>
Subject Re: virtual memory of all cassandra-nodes is growing extremly since Cassandra 1.1.0
Date Thu, 26 Jul 2012 06:18:56 GMT
I saw this.

All works fine upto version 1.1.0
the 0.8.x takes 5GB of memory of an 8GB machine
the 1.0.x takes between 6 and 7 GB on a 8GB machine
and
the 1.1.0 takes all

and it is a problem
for me it is no solution to wait of the OOM-Killer from the linux kernel
and restart the cassandraprocess

when my machine has less then 100MB ram available then I have a problem.



On 07/25/2012 07:06 PM, Tyler Hobbs wrote:
> 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
>> ------------------------------------------------------------------------
>>
>> TopTarif Internet GmbH, Pappelallee 78-79, D-10437 Berlin
>> Tel.: (030) 2000912 0 | Fax: (030) 2000912 100
>> thomas.spengler@toptarif.de | www.toptarif.de
>>
>> Amtsgericht Charlottenburg, HRB 113287 B
>> Geschäftsführer: Dr. Rainer Brosch, Dr. Carolin Gabor
>> -------------------------------------------------------------------------
>>
>>
>>
> 
> 


-- 
Thomas Spengler
Chief Technology Officer
------------------------------------------------------------------------

TopTarif Internet GmbH, Pappelallee 78-79, D-10437 Berlin
Tel.: (030) 2000912 0 | Fax: (030) 2000912 100
thomas.spengler@toptarif.de | www.toptarif.de

Amtsgericht Charlottenburg, HRB 113287 B
Geschäftsführer: Dr. Rainer Brosch, Dr. Carolin Gabor
-------------------------------------------------------------------------



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