Hi, We're attempting to use Riak as our primary key-value and search database for an analytics-typed solution to blocking spam/fraud.
As we expect to eventually be handling a huge amount of data, I started with a ring size of 1024. We currently have 10 nodes on Google Cloud n1-standard-16 instances [ 16 cores, 60gb RAM, 720gb local ssd. ]. Disks are at about 60% usage [ roughly 175gb leveldb, 16gb yz, 45gb anti_entropy, 6gb yz_anti_entropy ], and request wise we're at about 20k/min get, 4k/min set. Load average is usually around 6. I'm assuming most of the issues we're seeing are Yokozuna related, but we're seeing a ton of tcp timeouts during handoffs, very slow get/set queries, and a slew of other errors. Right now I'm trying to debug an issue where one of the 10 nodes pegged all the cpu cores. Mostly with the `bean` process. # riak-admin top Output server crashed: connection_lost With few other options (as it was causing slow queries across the cluster) I stopped the server and saw hundreds of the following (interesting) messages in the log:: 2016-01-05 18:28:28.573 [info] <0.4958.0>@yz_index_hashtree:close_trees:557 Deliberately marking YZ hashtree {1458647141945490998441568260777384029383167049728,3} for full rebuild on next restart As well as a ton of (I think related?): 2016-01-05 18:28:31.153 [error] <0.5982.0>@yz_kv:index_internal:237 failed to index object {{<<"features">>,<<"features">>},<<"0NKqMtj3O6_">>} with error {noproc,{gen_server,call,[yz_entropy_mgr,{get_tree,1120389438774178506630754486017853682060456099840},infinity]}} because [{gen_server,call,3,[{file,"gen_server.erl"},{line,188}]},{yz_kv,get_and_set_tree,1,[{file,"src/yz_kv.erl"},{line,452}]},{yz_kv,update_hashtree,4,[{file,"src/yz_kv.erl"},{line,340}]},{yz_kv,index,7,[{file,"src/yz_kv.erl"},{line,295}]},{yz_kv,index_internal,5,[{file,"src/yz_kv.erl"},{line,224}]},{riak_kv_vnode,actual_put,6,[{file,"src/riak_kv_vnode.erl"},{line,1619}]},{riak_kv_vnode,perform_put,3,[{file,"src/riak_kv_vnode.erl"},{line,1607}]},{riak_kv_vnode,do_put,7,[{file,"src/riak_kv_vnode.erl"},{line,1398}]}] For reference the TCP timeout error looks like: 2016-01-01 01:09:50.522 [error] <0.8430.6>@riak_core_handoff_sender:start_fold:272 hinted transfer of riak_kv_vnode from 'riak@riak25-2.c.authbox-api.internal' 185542200051774784537577176028434367729757061120 to 'riak@riak27-2.c.authbox-api.internal' 185542200051774784537577176028434367729757061120 failed because of TCP recv timeout Any suggestions about where to look? Regards, Josh _______________________________________________ riak-users mailing list riak-users@lists.basho.com http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com