[SERVER-16327] Text stage shouldn't do fetching if unneeded Created: 25/Nov/14 Updated: 28/Dec/23 |
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| Status: | Backlog |
| Project: | Core Server |
| Component/s: | Querying |
| Affects Version/s: | None |
| Fix Version/s: | None |
| Type: | Improvement | Priority: | Minor - P4 |
| Reporter: | Mathias Stearn | Assignee: | Backlog - Query Integration |
| Resolution: | Unresolved | Votes: | 1 |
| Labels: | qi-text-search | ||
| Remaining Estimate: | Not Specified | ||
| Time Spent: | Not Specified | ||
| Original Estimate: | Not Specified | ||
| Issue Links: |
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| Assigned Teams: |
Query Integration
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| Participants: | |||||||||
| Description |
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Currently the text stage always fetches the document: https://github.com/mongodb/mongo/blob/r2.8.0-rc1/src/mongo/db/exec/text.cpp#L291. This can be a significant amount of wasted work if just doing a count of documents matching a query. A WT test runs 4x faster with that line commented out (obviously not a real solution but a reasonable model for how one would perform). |