July 2016
Intermediate to advanced
180 pages
3h 16m
English
Content preview from Monitoring ElasticsearchBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Analyzing queries
Analyzing slow queries and improving their performance can be very challenging. This section examines how to look for the root cause of poor query performance, and it offers some different approaches to finding a solution.
Slow log
If you notice poor query performance, start with the slow log. To enable the slow log, edit elasticsearch.yml and add these configuration options to all nodes on the cluster:
index.search.slowlog.threshold.query.warn: 8s index.search.slowlog.threshold.query.info: 4s index.search.slowlog.threshold.query.debug: 2s index.search.slowlog.threshold.query.trace: 500ms index.search.slowlog.threshold.fetch.warn: 1s index.search.slowlog.threshold.fetch.info: 750ms index.search.slowlog.threshold.fetch.debug: 500ms ...
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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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