Hi Alexander, Can you comment on the read vs. write load of this cluster/
Could you please run the following command and reply with the output? sysctl -a | fgrep vm.dirty_ We've seen cases where dirty pages get written in a synchronous manner all at once, causing latency spikes due to I/O blocking. -- Luke Bakken Engineer / CSE lbak...@basho.com On Tue, Dec 9, 2014 at 4:58 AM, Alexander Popov <mogada...@gmail.com> wrote: > I have Riak 2.0.1 cluster with 5 nodes ( ec2 m3-large ) with elnm in front > sometimes I got spikes up to 10 seconds > > I can't say that I have huge load at this time, max 200 requests per > second for all 5 nodes. > > Most expensive queries is > * list by secondary index ( usually returns from 0 to 100 records ) > * and solr queries( max 10 records ) > > save operations is slowdown sometimes but not so much ( up to 1 sec ) > > It's slowdown not for specific requests, same one work pretty fast later. > > Does it any possibilities to profile|log somehow to determine reason > why this happen? > > _______________________________________________ > riak-users mailing list > riak-users@lists.basho.com > http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com _______________________________________________ riak-users mailing list riak-users@lists.basho.com http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com
