Simple insert workload:
res = benchRun({
ops: [
{op: "insert", doc: {}, ns: "test.c"},
],
seconds: 45,
parallel: 15
})
printjson(res)
standalone shows ~11% throughput reduction
3.4.9: "totalOps/s" : 312257.31243007537, 3.6.0-rc0 "totalOps/s" : 277214.2306740861,
1-node replica set shows ~50% throughput reduction
3.4.9: "totalOps/s" : 181808.21357151057, 3.6.0-rc0 "totalOps/s" : 91202.31599375796,
Metrics for the 1-node replica set case suggest issue may be related to large number of write-lock calls, about 3 per insert:
- depends on
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SERVER-31902 Reduce contention on ShardingState::_mutex for insert workloads
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SERVER-31879 remove extraneous synchronization in oplog
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SERVER-31899 Improve getTerm() performance
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SERVER-34562 I use YCSB testing comparise mongodb3.6.3 with mongodb3.4.13 ,find the mongodb3.4.13 insert and update performance is one and a half times than mongodb3.6.3
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- Closed
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