I use Riak KV with small size server(c4.xlarge@AWS 1 instance). When I run riak several days, latency of riak KV seems to be long. So I checked latency of riak KV by using basho bench with smaller server. At first, I checked write latency. My questions are 1. Why write latency drops continuously? How can I avoid it? 2. yokozuna Java process becoms to allocate big siz of memory. Initially it is about 500MB, finally it become 2GB. JVM option set in search.solr.jvm_options is "-Xmx1g", 2GB exceeds the value. Is it normal behavior? 3. Write latency also periodically drops every about 10000 sec. What is this cicle?
------ Result summary ------- <http://riak-users.197444.n3.nabble.com/file/n4033651/summary.png> ------ Benchmark environment ------- Basho bench server: c4.xlarge: 7.5GB RAM Riak KV Server: c4.large: 3.75GB RAM Riak version: 2.1.1 riak.conf: ring_size = 16 storage_backend = leveldb search = on Any others except server addresses are same as default value. Bucket property: { "props": { "name": "BUCKET_A", "active": true, "allow_mult": false, "basic_quorum": false, "big_vclock": 50, "chash_keyfun": { "mod": "riak_core_util", "fun": "chash_std_keyfun" }, "claimant": "riak@172.31.0.160", "dvv_enabled": true, "dw": "quorum", "last_write_wins": false, "linkfun": { "mod": "riak_kv_wm_link_walker", "fun": "mapreduce_linkfun" }, "n_val": 1, "notfound_ok": false, "old_vclock": 86400, "postcommit": [], "pr": 0, "precommit": [], "pw": 0, "r": 1, "rw": "quorum", "search_index": "BUCKET_A_SEARCH_INDEX", "small_vclock": 50, "w": 1, "young_vclock": 20 } } Basho bench configuration: "json_v" is not real one. I modified field names for this report. ----- {mode, max}. {duration, 4320}. {concurrent, 300}. {driver, basho_bench_driver_http}. %% Preload 1 million keys {key_generator, {int_to_str, {uniform_int, 100000000}}}. {value_generator, {fixed_bin, 100}}. {generators, [ {string_g, {key_generator, {int_to_str, {uniform_int, 50000}}}}, {bucket_g, {key_generator, {int_to_str, {uniform_int, 3}}}} ]}. {values, [ {json_v, {"{\"attr1_i\":0,\"attr2_i\":0,\"attr3_s\":\"~s\",\"attr4_s\":\"\",\"attr5_i\":4,\"attr6_i\":318,\"attr7_i\":9,\"attr8_i\":4,\"attr9_i\":14,\"attr10_i\":1010,\"attr11_i\":1005,\"attr12_i\":1015,\"attr13_i\":30,\"attr14_i\":15,\"attr15_i\":45,\"attr16_i\":19,\"attr17_i\":14,\"attr18_i\":24,\"attr19_i\":1,\"attr20_l\":1446088404435,\"attr21_i\":1,\"attr22_s\":\"TEST:tstff:000000000000310\",\"attr23_i\":3,\"attr24_s\":\"TESTtstff000000000000310\",\"attr25_l\":1445869988879,\"attr26_l\":1446088413157,\"attr27_i\":6473}", [string_g]}} ]}. {headers, [ {json_h, [{'Content-Type', 'application/json'}]} ]}. {targets, [ {map_targets, [ {"172.31.0.160", 8098, {"/types/BUCKET_TYPE_A/buckets/BUCKET_A/keys/~s", [key_generator]}} ]} ]}. {operations, [ {{post, map_targets, json_v, json_h}, 1} ]}. ----- -- View this message in context: http://riak-users.197444.n3.nabble.com/Latency-of-Riak-KV-drops-with-small-size-server-goes-long-tp4033651.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
