April 2018
Intermediate to advanced
508 pages
15h 22m
English
Content preview from PostgreSQL 10 High Performance - Third Edition
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Working around optimizer bugs
Only if you can't get the statistics or cost data to work as expected should you then take drastic measures such as disabling optimizer features. But bear in mind that flags such as enable_hashjoin and enable_seqscan can be valuable for another reason altogether. Sometimes, bad optimizer behavior can result from a database bug or limitation. If you know or suspect that, toggling optimizer features off can help you determine which code path may be involved in your issue. Also, there's nothing wrong with temporarily working around a bad plan by putting one of these optimizer hacks into place as a triage measure, to buy yourself time to figure out what's really wrong. Resist doing that in the server configuration ...
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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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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.