[SERVER-28045] Add an {ns, lastmod} index hint to the query created by ConfigDiffTracker::configDiffQuery() Created: 17/Feb/17 Updated: 07/Apr/23 Resolved: 04/Apr/23 |
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| Status: | Closed |
| Project: | Core Server |
| Component/s: | Sharding |
| Affects Version/s: | None |
| Fix Version/s: | None |
| Type: | Improvement | Priority: | Major - P3 |
| Reporter: | Dianna Hohensee (Inactive) | Assignee: | [DO NOT USE] Backlog - Sharding EMEA |
| Resolution: | Won't Do | Votes: | 0 |
| Labels: | AdiZ, PM-256 | ||
| Remaining Estimate: | Not Specified | ||
| Time Spent: | Not Specified | ||
| Original Estimate: | Not Specified | ||
| Issue Links: |
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| Assigned Teams: |
Sharding EMEA
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| Participants: | |||||||||
| Description |
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We depend on the {ns, lastmod}index on config.chunks being used in the chunk diff query to config.chunks so that yielding does not cause us to miss chunk documents and never see them. We should include a hint on the query to assure that the query planner uses that index for the request: it's very unlikely that the planner will choose not to use that index, but the planner can technically choose to use something else. |