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Posted to user@cassandra.apache.org by arun sirimalla <ar...@gmail.com> on 2014/09/23 02:57:34 UTC
High Compactions Pending
I have a 6 (i2.2xlarge) node cluster on AWS with 4.5 DSE running on it. I
notice high compaction pending on one of the node around 35.
Compaction throughput set to 64 MB and flush writes to 4. Any suggestion is
much appreciated.
--
Arun
Senior Hadoop Engineer
Cloudwick
Champion of Big Data
http://www.cloudera.com/content/dev-center/en/home/champions-of-big-data.html
Re: High Compactions Pending
Posted by Chris Lohfink <cl...@blackbirdit.com>.
Whats the output of 'nodetool compactionstats'? Is concurrent_compactors not set in your cassandra.yaml? Any Exception or Error 's in the system.log or output.log?
---
Chris Lohfink
On Sep 22, 2014, at 9:50 PM, Arun <ar...@gmail.com> wrote:
> Its constant since 4 hours. Remaining nodes have around 10 compactions. We have 4 column families.
>
>
> On Sep 22, 2014, at 19:39, Chris Lohfink <cl...@blackbirdit.com> wrote:
>
>> 35 isn't that high really in some scenarios (ie, theres a lot of column families), is it continuing to climb or does it drop down shortly after?
>>
>> ---
>> Chris Lohfink
>>
>> On Sep 22, 2014, at 7:57 PM, arun sirimalla <ar...@gmail.com> wrote:
>>
>>> I have a 6 (i2.2xlarge) node cluster on AWS with 4.5 DSE running on it. I notice high compaction pending on one of the node around 35.
>>> Compaction throughput set to 64 MB and flush writes to 4. Any suggestion is much appreciated.
>>>
>>> --
>>> Arun
>>> Senior Hadoop Engineer
>>> Cloudwick
>>>
>>> Champion of Big Data
>>> http://www.cloudera.com/content/dev-center/en/home/champions-of-big-data.html
>>
Re: High Compactions Pending
Posted by Arun <ar...@gmail.com>.
Its constant since 4 hours. Remaining nodes have around 10 compactions. We have 4 column families.
> On Sep 22, 2014, at 19:39, Chris Lohfink <cl...@blackbirdit.com> wrote:
>
> 35 isn't that high really in some scenarios (ie, theres a lot of column families), is it continuing to climb or does it drop down shortly after?
>
> ---
> Chris Lohfink
>
>> On Sep 22, 2014, at 7:57 PM, arun sirimalla <ar...@gmail.com> wrote:
>>
>> I have a 6 (i2.2xlarge) node cluster on AWS with 4.5 DSE running on it. I notice high compaction pending on one of the node around 35.
>> Compaction throughput set to 64 MB and flush writes to 4. Any suggestion is much appreciated.
>>
>> --
>> Arun
>> Senior Hadoop Engineer
>> Cloudwick
>>
>> Champion of Big Data
>> http://www.cloudera.com/content/dev-center/en/home/champions-of-big-data.html
>
Re: High Compactions Pending
Posted by Chris Lohfink <cl...@blackbirdit.com>.
35 isn't that high really in some scenarios (ie, theres a lot of column families), is it continuing to climb or does it drop down shortly after?
---
Chris Lohfink
On Sep 22, 2014, at 7:57 PM, arun sirimalla <ar...@gmail.com> wrote:
> I have a 6 (i2.2xlarge) node cluster on AWS with 4.5 DSE running on it. I notice high compaction pending on one of the node around 35.
> Compaction throughput set to 64 MB and flush writes to 4. Any suggestion is much appreciated.
>
> --
> Arun
> Senior Hadoop Engineer
> Cloudwick
>
> Champion of Big Data
> http://www.cloudera.com/content/dev-center/en/home/champions-of-big-data.html