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You're reading from  Learning Neo4j 3.x - Second Edition

Product typeBook
Published inOct 2017
Reading LevelIntermediate
PublisherPackt
ISBN-139781786466143
Edition2nd Edition
Languages
Java
Tools
Neo4j
Concepts
Databases
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Author (1)
Jerome Baton
Jerome Baton
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Jerome Baton

Jérôme Baton started hacking computers at the age of skin problems, gaming first then continued his trip by self-learning Basic on Amstrad CPC, peaking on coding a full screen horizontal starfield, and messing the interlace of the video controller so that sprites appeared twice as high in horizontal beat'em up games. Disks were three inches for 178 Kb then. Then, for gaming reasons, he switched to Commodore Amiga and its fantastic AMOS Basic. Later caught by seriousness and studies, he wrote Turbo Pascal, C, COBOL, Visual C++, and Java on PCs and mainframes at university, and even Logo in high school. Then, Java happened and he became a consultant, mostly on backend code of websites in many different businesses. Jérôme authored several articles in French on Neo4j, JBoss Forge, an Arduino workshop for Devoxx4Kids, and reviewed kilos of books on Android. He has a weakness for wordplay, puns, spoonerisms, and Neo4j that relieves him from join(t) pains. Jérôme also has the joy to teach in French universities, currently at I.U.T de Paris, Université Paris V - René Descartes (Neo4j, Android), and Université de Troyes (Neo4j), where he does his best to enterTRain the students. When not programming, Jérôme enjoys photography, doing electronics, everything DIY, understanding how things work, trying to be clever or funny on Twitter, and spends a lot of time trying to understand his kids and life in general.
Read more about Jerome Baton

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Rules of thumb

Here is a list of rules to help you make your queries the most performant possible.

Explain all the queries

Once written and their results verified, explain all your queries on a decent dataset to look for possible bottlenecks, as explained earlier in this chapter.

Rows

In your query plans, the row counts should decrease rapidly from top to bottom. If not, did you use enough labels? Enough indexes? Are the properties you use indexed?

Do not overconsume

Virtual resources are resources too. Do not waste CPU cycles, memory, and energy by returning more data than you need. Do not get the full nodes if you only want to use a few properties of each.

Cartesian or not?

Unless authorized, you should not do a cartesian product in your queries. You may already know this, but sometimes it happens. For example, here is one, the most obvious:

MATCH (n),(m)
RETURN n,m

Mind that the number of results is the square of the number of nodes. Recognize cartesian products by the lack of relation expressed...

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Learning Neo4j 3.x - Second Edition
Published in: Oct 2017Publisher: PacktISBN-13: 9781786466143
© 2017 Packt Publishing Limited All Rights Reserved

Author (1)

author image
Jerome Baton

Jérôme Baton started hacking computers at the age of skin problems, gaming first then continued his trip by self-learning Basic on Amstrad CPC, peaking on coding a full screen horizontal starfield, and messing the interlace of the video controller so that sprites appeared twice as high in horizontal beat'em up games. Disks were three inches for 178 Kb then. Then, for gaming reasons, he switched to Commodore Amiga and its fantastic AMOS Basic. Later caught by seriousness and studies, he wrote Turbo Pascal, C, COBOL, Visual C++, and Java on PCs and mainframes at university, and even Logo in high school. Then, Java happened and he became a consultant, mostly on backend code of websites in many different businesses. Jérôme authored several articles in French on Neo4j, JBoss Forge, an Arduino workshop for Devoxx4Kids, and reviewed kilos of books on Android. He has a weakness for wordplay, puns, spoonerisms, and Neo4j that relieves him from join(t) pains. Jérôme also has the joy to teach in French universities, currently at I.U.T de Paris, Université Paris V - René Descartes (Neo4j, Android), and Université de Troyes (Neo4j), where he does his best to enterTRain the students. When not programming, Jérôme enjoys photography, doing electronics, everything DIY, understanding how things work, trying to be clever or funny on Twitter, and spends a lot of time trying to understand his kids and life in general.
Read more about Jerome Baton

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