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PostgreSQL 9 Administration Cookbook - Second Edition
book

PostgreSQL 9 Administration Cookbook - Second Edition

by Simon Riggs, GIANNI CIOLLI, Hannu Krosing, Gabriele Bartolini
April 2015
Intermediate to advanced content levelIntermediate to advanced
504 pages
11h 41m
English
Packt Publishing
Content preview from PostgreSQL 9 Administration Cookbook - Second Edition

Understanding why queries slow down

In production environments with large databases and high concurrent access, it might happen that queries that used to run in tens of milliseconds suddenly take several seconds.

Likewise, a summary query for a report that used to run in a few seconds might take half an hour to complete.

Here are some ways to find out what is slowing them down.

Getting ready

Any questions of the type "why is this different today from what it was last week?" are much easier to answer if you have some kind of historical data collection setup.

Tools such as Cacti or Munin (for monitoring general server characteristics such as CPU and RAM usage, disk I/O, network traffic, and load average) are very useful to see what has changed recently, ...

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Publisher Resources

ISBN: 9781849519069Supplemental Content