December 2017
Intermediate to advanced
434 pages
10h 29m
English
Content preview from Learning Elastic Stack 6.0
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JVM heap size
Set -Xms and -Xmx to be the same. More heap means Elasticsearch can keep more data in memory for faster access. But more heap also means that when the Java heap is close to full, the JVM's garbage collector will run a full garbage collection. At that point, all other processing within the Elasticsearch node experiences a pause. So, the larger the heap size, the longer the pauses will be. The maximum heap size that one can configure is around 32 GB. Another recommendation to keep in mind is that we should allocate no more than 50% of the total available RAM on the machine to the Elasticsearch JVM. The reason behind it is that the system needs enough memory for the filesystem cache for Apache Lucene. Ultimately, all the data stored ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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