Hi there, We're using Riak 1.3.1 cluster with 3 nodes (CentOS 64-bit, Intel® Xeon® E3-1245 Quadcore, 16 GB DDR3 RAM ECC, 2 x 3 TB SATA 6 Gb/s HDD 7200 rpm (Software-RAID 1)) connected to the same 10 Gb router.
We hold lot of small key-value pairs in the database and do about 500 get operations and about 500 put requests per second via Java client library from different client machines. The problem is that 95% percentile (according to Riak statistics) often jumps up to 50000 ms for a couple of minutes. This is something quite far from we expected in terms of performance. We've tried setting the options in http://docs.basho.com/riak/latest/cookbooks/Linux-Performance-Tuning/ (except for noatime flag). But anyway, 50 seconds put timeout is something outstanding and I hardly believe noatime is a remedy. Log files appeared to be somewhat unclear to track down the problem. Is there anything else we can try? Thanks a lot! -- View this message in context: http://riak-users.197444.n3.nabble.com/Performance-problem-put-operation-takes-seconds-tp4028478.html Sent from the Riak Users mailing list archive at Nabble.com. _______________________________________________ riak-users mailing list riak-users@lists.basho.com http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com
