Hi Guillaume - What are the "objsize" stats for your cluster? -- Luke Bakken Engineer lbak...@basho.com
On Mon, May 2, 2016 at 4:45 AM, Guillaume Boddaert <guilla...@lighthouse-analytics.co> wrote: > Hi, > > I'm trying to setup a production environment with Riak as backend. > Unfortunately I have very slow write times that bottleneck my whole system. > > Here is a sample of one of my node (riak-admin status | grep -e > '^node_put_fsm_time'): > node_put_fsm_time_100 : 3305516 > node_put_fsm_time_95 : 230589 > node_put_fsm_time_99 : 1694593 > node_put_fsm_time_mean : 79864 > node_put_fsm_time_median : 14973 > > As you can see, I have really good times for most of my writes, yet the mean > time is not so good because a few writes are taking long (Up to 3 seconds) > How can I get rid of those slow insert ? Is that intended/normal ? > > My setup is the following: > 5 hosts (2CPU, %Cpu(s): 47,1 us, 1,3 sy, 0,0 ni, 51,3 id, 0,0 wa, 0,0 > hi, 0,2 si, 0,0 st) , ring_size: 128, aae disabled. > Writes are w=1 dw=0 > each host has 32go of ram, that is almost used for system caching only. > My data are stored on an openstack volume that support up to 3000IOPS. > > Here is an iostat sample for 1 minute: > avg-cpu: %user %nice %system %iowait %steal %idle > 38.00 0.00 1.81 0.03 0.08 60.07 > > Device: tps kB_read/s kB_wrtn/s kB_read kB_wrtn > vda 0.37 0.00 2.27 0 136 > vdb 9.60 0.00 294.53 0 17672 > > Thanks, > > Guilaume BODDAERT > > _______________________________________________ > 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
