[DOCS-410] Improve documentation of count where result returned using only index and count where records must be read. Created: 16/Aug/12  Updated: 29/Aug/14  Resolved: 29/Aug/14

Status: Closed
Project: Documentation
Component/s: manual
Affects Version/s: None
Fix Version/s: v1.3.10

Type: Bug Priority: Minor - P4
Reporter: Gregor Macadam Assignee: Kay Kim (Inactive)
Resolution: Done Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Issue Links:
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Participants:
Days since reply: 9 years, 24 weeks, 5 days ago

 Description   

Give some examples of count being used with an index - where the count is returned by looking only at the index and some where the records have to be checked. Give some explanation that the records must be paged into memory the first time the count is run and this will be slow the first time and subsequent indexes will be faster.



 Comments   
Comment by Githook User [ 29/Aug/14 ]

Author:

{u'username': u'kay-kim', u'name': u'kay', u'email': u'kay.kim@10gen.com'}

Message: DOCS-410 count and index use/performance
Branch: master
https://github.com/mongodb/docs/commit/7310f5ca71f4a06e91dd04d90c40bf812e488089

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