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Backwards Compatibility:
Fully Compatible
Operating System:
ALL
Backport Completed:

3.0.0-rc10
Steps To Reproduce:

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I have 50 threads bulk inserting 100 <1k documents as fast as Mongo will take them.

Using the MMap engine doesn't show this behavior. Right now, after running for ~8 minutes, my cpu is sitting at 23% and the insert rate is at 11k/s.

I don't know if this is expected or not, but it seems like quite a dramatic drop off.

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I have 50 threads bulk inserting 100 <1k documents as fast as Mongo will take them. Using the MMap engine doesn't show this behavior. Right now, after running for ~8 minutes, my cpu is sitting at 23% and the insert rate is at 11k/s. I don't know if this is expected or not, but it seems like quite a dramatic drop off.

WiredTiger starts at an insertion rate of 40k/sec, and slows down to 15k/sec within 2 minutes.

System memory is not exhausted.

Specifically the CPU% appears to drop from 100% quite quickly and insert times (for the individual bulk inserts) grows.

MongoStat doesn't appear to show any specific resource limit, nor do I see anything obvious.

Using the C# driver 2.0.0-beta2.

Participants:: Daniel Pasette, Githook User, Mark Benvenuto, Michael Cahill, Nick Judson