[SERVER-18674] Very low throughput during portion of checkpoint under WiredTiger Created: 27/May/15 Updated: 14/Apr/16 Resolved: 16/Jul/15 |
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| Status: | Closed |
| Project: | Core Server |
| Component/s: | WiredTiger |
| Affects Version/s: | 3.1.3 |
| Fix Version/s: | None |
| Type: | Bug | Priority: | Major - P3 |
| Reporter: | Bruce Lucas (Inactive) | Assignee: | David Hows |
| Resolution: | Done | Votes: | 0 |
| Labels: | None | ||
| Remaining Estimate: | Not Specified | ||
| Time Spent: | Not Specified | ||
| Original Estimate: | Not Specified | ||
| Attachments: |
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| Backwards Compatibility: | Fully Compatible | ||||||||||||||||||||||||
| Operating System: | ALL | ||||||||||||||||||||||||
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| Description |
3.1.3-pre (f5450e9bc5cf63c3dc4d9cb416713b0f6970e6d4)
3.1.3 (51ad8eff0d50387f0565d23a15e7ba1db0ea962c)
3.1.4-pre (36ac7a5d8a6cc4f6280f90ce743ab05a77a541a8)
Notes:
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| Comments |
| Comment by David Hows [ 16/Jul/15 ] |
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Marking this as Done based on my testing, as I was unable to reproduce. There have been a number of changes to related parts of MongoDB and WT including the linked |
| Comment by David Hows [ 15/Jul/15 ] |
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I tested this along with Ran this on an r3.4xlarge using Bruce's setup and MongoDB master as at 15/7/2015 Hash: 3f301ac62e The instance had a generic (slow) SSD storage formatted using XFS. With the 10M workload there was no drop in throughput associated with checkpoints as seen in Bruce's graphs. There was only one small drop in query throughput and this was associated with an increase in writes (update ops). With the 20M workload there were no sustained drops in throughput |
| Comment by Michael Cahill (Inactive) [ 06/Jul/15 ] |
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david.hows can you please retest against MongoDB master? |