October 2010
Intermediate to advanced
468 pages
11h 35m
English
Content preview from PostgreSQL 9.0 High PerformanceBecome 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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Physical disk performance
While a lot of high-level information about disk performance has been mentioned already, if you want to get useful benchmarks from drives you'll need to know a bit more about their physical characteristics. This will drop back to theory for a bit, followed by examples of real measured disks that demonstrate common things you can expect to see.
Random access and I/Os Per Second
Enterprise storage vendors like to talk in terms of Input/Outputs Per Second or IOPS. If you're buying a SAN for example, expect to be asked "how many IOPS do you expect in total and per spindle?" and for measurements provided by the vendor proving good performance to be in this unit. This number represents typical disk performance on a seek-heavy ...
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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.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.