[SERVER-5090] aggregation: use covered index Created: 25/Feb/12 Updated: 27/Oct/15 Resolved: 12/Jul/12 |
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| Status: | Closed |
| Project: | Core Server |
| Component/s: | Aggregation Framework |
| Affects Version/s: | None |
| Fix Version/s: | None |
| Type: | Improvement | Priority: | Major - P3 |
| Reporter: | Eliot Horowitz (Inactive) | Assignee: | Mathias Stearn |
| Resolution: | Done | Votes: | 5 |
| Labels: | None | ||
| Remaining Estimate: | Not Specified | ||
| Time Spent: | Not Specified | ||
| Original Estimate: | Not Specified | ||
| Issue Links: |
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| Comments |
| Comment by Mathias Stearn [ 12/Jul/12 ] | ||||||||||||||||||
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Optimization hints needed in docs | ||||||||||||||||||
| Comment by auto [ 12/Jul/12 ] | ||||||||||||||||||
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Author: {u'date': u'2012-07-03T11:17:21-07:00', u'email': u'mathias@10gen.com', u'name': u'Mathias Stearn'}Message: | ||||||||||||||||||
| Comment by Chris Westin [ 27/Mar/12 ] | ||||||||||||||||||
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Are you suggesting that these just point into the disk image until they Suppose I have
And, there's no index on "c.k". The sort is "long," and we will yield; we have to copy fields before the sort.
And because of that, combined with the need to yield, we still end up needing Getting all the fields is clearly lousy. That's why I keep pointing at And, once we know what fields we need, we'll know at the beginning if we can | ||||||||||||||||||
| Comment by Chris Westin [ 25/Feb/12 ] | ||||||||||||||||||
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Can't be done unless I complete |