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You're reading from  Solr Cookbook - Third Edition

Product typeBook
Published inJan 2015
Reading LevelIntermediate
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ISBN-139781783553150
Edition1st Edition
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Rafal Kuc
Rafal Kuc
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Rafal Kuc

Rafał Kuć is a software engineer, trainer, speaker and consultant. He is working as a consultant and software engineer at Sematext Group Inc. where he concentrates on open source technologies such as Apache Lucene, Solr, and Elasticsearch. He has more than 14 years of experience in various software domains—from banking software to e–commerce products. He is mainly focused on Java; however, he is open to every tool and programming language that might help him to achieve his goals easily and quickly. Rafał is also one of the founders of the solr.pl site, where he tries to share his knowledge and help people solve their Solr and Lucene problems. He is also a speaker at various conferences around the world such as Lucene Eurocon, Berlin Buzzwords, ApacheCon, Lucene/Solr Revolution, Velocity, and DevOps Days. Rafał began his journey with Lucene in 2002; however, it wasn't love at first sight. When he came back to Lucene in late 2003, he revised his thoughts about the framework and saw the potential in search technologies. Then Solr came and that was it. He started working with Elasticsearch in the middle of 2010. At present, Lucene, Solr, Elasticsearch, and information retrieval are his main areas of interest. Rafał is also the author of the Solr Cookbook series, ElasticSearch Server and its second edition, and the first and second editions of Mastering ElasticSearch, all published by Packt Publishing.
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Avoiding caching of rare filters to improve the performance


Imagine that some of the filters you use in your queries are not good candidates for caching. You might wonder why—for example, do those filters have date and time with seconds or are spatial filters scattered all over the world? Such filters are quite unique, and thus when they are put into the cache, they are very rarely reused and thus they are more or less useless. Caching such filters is a waste of memory and CPU cycles. Is there something you can do to avoid filter queries caching? Yes, there is a way, and this recipe will show you how to do it.

How to do it...

Let's assume we have the following query being used to get the information we need:

q=solr+cookbook&fq=category:books&fq=date:[2014-06-12T13:22:12Z+TO+2014-07-11T11:24:54Z]

The filter query we don't want to cache is the one filtering our documents on the basis of the date field. Of course, even though we don't want that filter to be cached, we still want the filtering...

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Solr Cookbook - Third Edition
Published in: Jan 2015Publisher: ISBN-13: 9781783553150

Author (1)

author image
Rafal Kuc

Rafał Kuć is a software engineer, trainer, speaker and consultant. He is working as a consultant and software engineer at Sematext Group Inc. where he concentrates on open source technologies such as Apache Lucene, Solr, and Elasticsearch. He has more than 14 years of experience in various software domains—from banking software to e–commerce products. He is mainly focused on Java; however, he is open to every tool and programming language that might help him to achieve his goals easily and quickly. Rafał is also one of the founders of the solr.pl site, where he tries to share his knowledge and help people solve their Solr and Lucene problems. He is also a speaker at various conferences around the world such as Lucene Eurocon, Berlin Buzzwords, ApacheCon, Lucene/Solr Revolution, Velocity, and DevOps Days. Rafał began his journey with Lucene in 2002; however, it wasn't love at first sight. When he came back to Lucene in late 2003, he revised his thoughts about the framework and saw the potential in search technologies. Then Solr came and that was it. He started working with Elasticsearch in the middle of 2010. At present, Lucene, Solr, Elasticsearch, and information retrieval are his main areas of interest. Rafał is also the author of the Solr Cookbook series, ElasticSearch Server and its second edition, and the first and second editions of Mastering ElasticSearch, all published by Packt Publishing.
Read more about Rafal Kuc