We're utilizing Riak 14.2 and we're seeing higher memory consumption than we expect.
We're running on a 4 node cluster with each node housing 32gb of memory and are utilizing bitcask with a 3x write replication factor. We're seeing faster growth than we expect and also seeing weird bounces update. You can see an example chart <http://picturepush.com/public/6331935>. (note, there are sometimes where we've had to stop the job for short periods of time-- you can see these as flat spots). We are doing a large throttled import that has key sizes of approximately 12 bytes. We're currently around 450mm unique items and riak memory consumption is ~110gb. The input job is probably 95% new puts and 5% overwriting puts. According to the capacity planner tools, our key space should probably be about half what are actual memory consumption is. As you can see in the chart, we're also seeing jumps in memory size at random intervals. What might these be? Nothing interesting in the logs that I can see. Regular merges. A close up <http://picturepush.com/public/6332084> of a recent jump in memory consumption for one of the nodes (they all look the same). There are no corresponding distinct patterns within the cpu chart. Things are pretty flat although we have more wait sometimes than we like (need more spindles clearly). Any helpful thoughts? Thanks, Jacques
_______________________________________________ riak-users mailing list riak-users@lists.basho.com http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com
