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From Jonathan Colby <jonathan.co...@gmail.com>
Subject Disable Swap? batch_mutate failed: out of sequence response
Date Tue, 05 Apr 2011 19:13:24 GMT
Hi Jonathan -

Would you recommend to disable system swap as a rule?   I'm running on Debian 64bit and am
seeing light swapping:

             total       used       free     shared    buffers     cached
Mem:          8003       7969         33          0          0       4254
-/+ buffers/cache:       3714       4288
Swap:          513         15        498




On Apr 5, 2011, at 8:35 PM, Jonathan Ellis wrote:

> Step 1: disable swap.
> 
> 2011/4/5 Héctor Izquierdo Seliva <izquierdo@strands.com>:
>> Update with more info:
>> 
>> I'm still running into problems. Now I don't write more than 100 columns
>> at a time, and I'm having lots of Stop-the-world gc pauses.
>> 
>> I'm writing into three column families, with memtable_operations = 0.3
>> and memtable_throughput = 64. There is now swapping, and full GCs are taking around
5 seconds. I'm running cassandra with a heap of 8 GB. Should I tune this somehow?
>> 
>> Is any of this wrong?
>>> 
>>>>> -----Original Message-----
>>>>> From: Héctor Izquierdo Seliva [mailto:izquierdo@strands.com]
>>>>> Sent: April-05-11 8:30
>>>>> To: user@cassandra.apache.org
>>>>> Subject: batch_mutate failed: out of sequence response
>>>>> 
>>>>> Hi everyone. I'm having trouble while inserting big amounts of data into
>>>>> cassandra. I'm getting this exception:
>>>>> 
>>>>> batch_mutate failed: out of sequence response
>>>>> 
>>>>> I'm gessing is due to very big mutates. I have made the batch mutates
>>>>> smaller and it seems to be behaving. Can somebody shed some light?
>>>>> 
>>>>> Thanks!
>>>>> 
>>>>> No virus found in this incoming message.
>>>>> Checked by AVG - www.avg.com
>>>>> Version: 9.0.894 / Virus Database: 271.1.1/3551 - Release Date: 04/05/11
02:34:00
>>>>> 
>>>> 
>>>> 
>>> 
>>> 
>> 
>> 
>> 
> 
> 
> 
> -- 
> Jonathan Ellis
> Project Chair, Apache Cassandra
> co-founder of DataStax, the source for professional Cassandra support
> http://www.datastax.com


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