[SERVER-32252] Secondary Disk Utilization Higher Issue! Created: 11/Dec/17 Updated: 09/Feb/18 Resolved: 18/Jan/18 |
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| Status: | Closed |
| Project: | Core Server |
| Component/s: | WiredTiger |
| Affects Version/s: | 3.4.3, 3.4.4, 3.4.10 |
| Fix Version/s: | None |
| Type: | Bug | Priority: | Major - P3 |
| Reporter: | kang | Assignee: | Mark Agarunov |
| Resolution: | Done | Votes: | 0 |
| Labels: | None | ||
| Remaining Estimate: | Not Specified | ||
| Time Spent: | Not Specified | ||
| Original Estimate: | Not Specified | ||
| Attachments: |
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| Operating System: | ALL |
| Steps To Reproduce: | Always occur |
| Participants: |
| Description |
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The cancels value of the replication counters of the first secondary increases steadily. And the disk utilization value of secondary server is 10% higher than primary and hidden secondary. test langunge : java (mongo java driver 2.13.2 & 3.5), python (pymongo 3.4)
--> Even if the chainingAllowed option is set to 0, it is the same. |
| Comments |
| Comment by Mark Agarunov [ 18/Jan/18 ] |
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Hello dongho, Thank you for the information. Unfortunately the tools we use to analyze the diagnostic data are not currently publicly available. Alternatively, this data can be collected in json format which can then be used with other tooling. Please note that SERVER project is for reporting bugs or feature suggestions for the MongoDB server. For MongoDB-related support discussion please post on the mongodb-user group or Stack Overflow with the mongodb tag. A question like this involving more discussion would be best posted on the mongodb-user group. Thanks, |
| Comment by kang [ 13/Dec/17 ] |
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Hello Mark Is it normal to increase the cancel counters at protocol = 1? I wonder why. ps. Secondary disk usage of live servers equipment is high. Thanks~ |
| Comment by Mark Agarunov [ 12/Dec/17 ] |
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Hello dongho, Thank you for providing this information. After looking over the diagnostic data, It seems that the disk utilization is about equal across all nodes, with the primaries both at a slightly lower utilization than the secondaries, but not meaningful difference between nodes of the same type: Additionally, the cancel counters seem consistent among the nodes and within normal ranges: Please let me know if there is something I missed in this and if this is causing any adverse effects for you. Thanks, |
| Comment by kang [ 12/Dec/17 ] |
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mongod config file... information (xxx_logd1rs2) storage: |
| Comment by kang [ 12/Dec/17 ] |
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Newly tested. *AWS EC2 server for testing.xlsx mongos__mongo.zip |
| Comment by Mark Agarunov [ 11/Dec/17 ] |
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Hello dongho, Thank you for the report. To get a better idea of what may be causing this, could you please provide the following:
This should provide some insight into why you're seeing increased disk usage on the secondary. Thanks, |
| Comment by kang [ 11/Dec/17 ] |
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Reference: |