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Type:
Bug
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Resolution: Community Answered
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Priority:
Major - P3
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None
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Affects Version/s: 4.0.16
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Component/s: Diagnostics
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Labels:None
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Fully Compatible
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ALL
mongo cluster has two shard using hash policy.i test on mongo 4.0.16.
mongostat on shard 1 show qrw+arw less queue.but mongostat on shard arw fixed 128 queue,qarw 600+,mongotop for shard collection,400-600s write,but in mongo log,sql execute time is 100-500ms.so my cluster ops is 5000/s,my machine is 56c +512g +12tb ssd 10 with sas interface.
mongo cluster:
p s a (shard1)
a s p(shard2)
one machine:shard 1 primary + shard2 a
one mchine:shard 1 second + shard2 second
one machine:shard2 primary + shard 1 a
[shard1]
insert query update delete getmore command dirty used flushes vsize res qrw arw net_in net_out conn set repl time 1298 1296 1295 *0 497 598|0 4.0% 80.0% 0 235G 224G 0|1 1|0 5.23m 5.04m 70 myShard_1 PRI Apr 18 17:42:01.888 1306 1308 1309 *0 499 598|0 4.0% 80.0% 0 235G 224G 0|0 1|0 5.28m 5.02m 70 myShard_1 PRI Apr 18 17:42:02.888 1264 1263 1262 *0 522 617|0 4.0% 80.0% 0 235G 224G 0|0 1|0 5.15m 4.92m 70 myShard_1 PRI Apr 18 17:42:03.887 1383 1382 1382 *0 507 614|0 4.1% 80.0% 0 235G 224G 0|0 1|0 5.56m 5.29m 70 myShard_1 PRI Apr 18 17:42:04.887 1316 1316 1318 *0 517 623|0 4.1% 80.0% 0 235G 224G 0|0 2|0 5.33m 5.09m 70 myShard_1 PRI Apr 18 17:42:05.887
[shard2]
insert query update delete getmore command dirty used flushes vsize res qrw arw net_in net_out conn set repl time 1169 1188 1189 *0 0 7|0 15.5% 68.4% 0 242G 206G 0|665 5|128 4.18m 2.28m 926 myShard_2 PRI Apr 18 17:29:24.155 1075 1074 1072 *0 0 4|0 15.5% 68.4% 0 242G 206G 0|658 3|128 3.84m 2.09m 926 myShard_2 PRI Apr 18 17:29:25.153 1115 1111 1112 *0 0 6|0 15.5% 68.4% 0 242G 206G 0|666 3|128 3.92m 2.18m 926 myShard_2 PRI Apr 18 17:29:26.155 1198 1207 1206 *0 0 5|0 15.5% 68.4% 0 242G 206G 0|662 4|128 4.31m 2.33m 925 myShard_2 PRI Apr 18 17:29:27.153 1182 1173 1173 *0 0 2|0 15.5% 68.4% 0 242G 206G 0|661 5|128 4.15m 2.26m 926 myShard_2 PRI Apr 18 17:29:28.153 1212 1219 1218 *0 0 7|0 15.5% 68.4% 0 242G 206G 0|662 4|128 4.34m 2.35m 926 myShard_2 PRI Apr 18 17:29:29.154 1174 1190 1188 *0 0 5|0 15.5% 68.4% 0 242G 207G 0|658 5|128 4.23m 2.29m 926 myShard_2 PRI Apr 18 17:29:30.154 1247 1252 1251 *0 0 13|0 15.5% 68.4% 0 242G 207G 0|652 5|128 4.43m 2.45m 926 myShard_2 PRI Apr 18 17:29:31.155 1234 1229 1221 *0 0 45|0 15.5% 68.4% 0 242G 207G 0|659 5|128 4.35m 2.58m 926 myShard_2 PRI Apr 18 17:29:32.154 1214 1221 1221 *0 0 24|0 15.5% 68.4% 0 242G 207G 0|660 5|128 4.31m 2.42m 926 myShard_2 PRI Apr 18 17:29:33.154 insert query update delete getmore command dirty used flushes vsize res qrw arw net_in net_out conn set repl time 1236 1225 1224 *0 0 15|0 15.5% 68.4% 0 242G 207G 0|657 5|128 4.36m 2.37m 920 myShard_2 PRI Apr 18 17:29:34.154 1197 1186 1188 *0 0 13|0 15.5% 68.4% 0 242G 207G 0|661 5|128 4.25m 2.31m 920 myShard_2 PRI Apr 18 17:29:35.154 1259 1297 1296 *0 0 16|0 15.5% 68.4% 0 242G 207G 0|657 6|128 4.55m 2.54m 920 myShard_2 PRI Apr 18 17:29:36.155
