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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Crash recovery and the buffer cache
If you had to write out every database change to disk immediately after it's made, the database performance would really suffer. This is particularly true on blocks that you change all the time, which would then be written very often. But you have to be able to recover if the server crashes before things are written out completely, too. Periodic database checkpoints take care of that.
Checkpoint processing basics
A checkpoint iterates over every dirty block in the system as of a point in time, writing them out to disk. Then that information is flushed to permanent storage, via the same mechanisms WAL writes are. Once that's done, if your system crashes, recovery from the crash will start from this new last point ...
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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.