cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From aaron morton <>
Subject Re: Predictable low RW latency, SLABS and STW GC
Date Sun, 24 Jul 2011 22:15:21 GMT
Restarting the service will drop all the memmapped caches, cassandra caches are saved / persistent
and you can also use memcachd if you want. 

Are you experiencing stop the world pauses? There are some things that can be done to reduce
the chance of them happening. 


Aaron Morton
Freelance Cassandra Developer

On 23 Jul 2011, at 05:34, Milind Parikh wrote:

> In order to be predicable @ big data scale, the intensity and periodicity of STW Garbage
Collection has to be brought down. Assume that SLABS (Cass 2252) will be available in the
main line at some time and assume that this will have the impact that other projects (hbase
etc) are reporting. I womder whether avoiding GC by restarting the servers before GC will
be a feasible approach (of course while knowing the workload)
> Regards
> Milind

View raw message