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Type: Bug
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Resolution: Done
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Priority: Major - P3
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None
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Affects Version/s: 2.8.0-rc2
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Component/s: Performance, Storage, WiredTiger
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Storage Execution
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ALL
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I get intermittent slow inserts with the WiredTiger b-tree in 2.8.0rc2. These are the top-10 worst ones from a test in progress. The numbers are milliseconds, so there are many inserts that take more than 100 seconds:
119597
118610
118465
117977
117437
116611
116498
116068
113909
113342
This doesn't reproduce with the WiredTiger LSM. I wonder if a slow checkpoint is the problem but I have not done the work to trigger collection of thread stacks when there is a stall, in part because my client code and the error log is printed when the stall ends.
I will repeat the test with PMP running to get thread stacks every 10 seconds to see if I get stack when the problem occurs.
- is related to
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SERVER-17407 Significant performance degradation between SA mongod to replica set on insert only workload
- Closed
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SERVER-16665 WiredTiger b-tree uses too much space in journal directory
- Closed
- related to
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SERVER-17157 Seeing pauses in YCSB performance workload with WiredTiger
- Closed