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Published in:
Introduction to MongoDB Read chapter Read first chapter

2015 | OriginalPaper | Chapter

10. Optimization

Authors : David Hows, Peter Membrey, Eelco Plugge, Tim Hawkins

Published in: The Definitive Guide to MongoDB

Publisher: Apress

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Abstract

There is a tongue-in-cheek statement attributed to an unknown Twitter user: “If a MongoDB query runs for longer than 0ms, then something is wrong.” This is typical of the kind of buzz that surrounded the product when it first burst onto the scene in 2009.

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Footnotes
1
Gory details: the scanAndOrder query plan “anonymous, timestamp” wins over the pre-ordered plan “anonymous, rating,” because it gets to the end of my small result set first. But if I had a larger result set, then the pre-ordered plan might win. First, because it returns data in the right order, so it crosses the finish line when it finds 101 documents, while a scanAndOrder query plan isn’t declared finished until it’s found all the results. Second, because a scanAndOrder plan quits the race if it reaches 32MB of data, leaving the pre-ordered plans to finish. I told you these details would be gory.
 
Metadata
Title
Optimization
Authors
David Hows
Peter Membrey
Eelco Plugge
Tim Hawkins
Copyright Year
2015
Publisher
Apress
Book
The Definitive Guide to MongoDB

Print ISBN: 978-1-4842-1183-0

Electronic ISBN: 978-1-4842-1182-3

Copyright Year: 2015

DOI
https://doi.org/10.1007/978-1-4842-1182-3_10

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