[SERVER-21092] wiredTiger performance regression from 3.0.6 for contended update Created: 23/Oct/15 Updated: 26/Feb/16 Resolved: 26/Feb/16 |
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| Status: | Closed |
| Project: | Core Server |
| Component/s: | WiredTiger |
| Affects Version/s: | None |
| Fix Version/s: | None |
| Type: | Bug | Priority: | Major - P3 |
| Reporter: | Chung-yen Chang | Assignee: | Chung-yen Chang |
| 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 | ||||||||||||||||||||||||||||||||||
| Steps To Reproduce: |
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| Sprint: | Performance 10 (02/22/16), Performance 11 (03/14/16) | ||||||||||||||||||||||||||||||||||
| Participants: |
| Description |
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Running a highly contended update workload, a significant performance regression was observed for wiredTiger compared to 3.0.6. With 64 threads concurrently updating a single document, the drop was ~15% for a single-node set up with oplog. Same workload on a 3-node replset showed roughly 30% drop. Interestingly, same workloads with 32 threads contending on doing the update, the throughput is more than 50% higher and shows no regression compared to 3.0.6. |
| Comments |
| Comment by Chung-yen Chang [ 26/Feb/16 ] |
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There has been multiple improvement to performance since this ticket was filed. The accumulative effect of those improvements has recovered the issue reported in this ticket. In our latest performance test, the maximum throughputs achieved on master and 3.2 are higher than 3.0.6. The master still has slightly lower throughput at the thread count of 64 but it's very close to the noise range of our workload. With the recovery observed in the latest tests, we can close this ticket as fixed. |
| Comment by Alexander Gorrod [ 17/Nov/15 ] |
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Alex's reproducer scripts. |
| Comment by Githook User [ 13/Nov/15 ] |
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Author: {u'username': u'ksuarz', u'name': u'Kyle Suarez', u'email': u'kyle.suarez@mongodb.com'}Message: This overrides the reference rule against the baseline. |