cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From William Katsak <wkat...@cs.rutgers.edu>
Subject Re: high pending compactions
Date Sun, 08 Jun 2014 16:43:45 GMT
Have you verified that these aren't "stuck compactions"? e.g. even under 
no load, they don't go away?

-Bill


On 06/08/2014 12:32 PM, Jake Luciani wrote:
> 2&3
>
> On Sunday, June 8, 2014, S C <asf11@outlook.com
> <mailto:asf11@outlook.com>> wrote:
>
>     I am using Cassandra 1.1 (sorry bit old) and I am seeing high
>     pending compaction count. "pending tasks: 67" while active
>     compaction tasks are not more than 5. I have a 24CPU machine.
>     Shouldn't I be seeing more compactions? Is this a pattern of high
>     writes and compactions backing up? How can I improve this? Here are
>     my thoughts.
>
>      1. Increase memtable_total_space_in_mb
>      2. Increase compaction_throughput_mb_per_sec
>      3. Increase concurrent_compactions
>
>
>     Sorry if this was discussed already. Any pointers is much appreciated.
>
>     Thanks,
>     Kumar
>
>
>
> --
> http://twitter.com/tjake

Mime
View raw message