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PostgreSQL 10 Administration Cookbook - Fourth Edition
book

PostgreSQL 10 Administration Cookbook - Fourth Edition

by Simon Riggs, Gianni Ciolli
May 2018
Intermediate to advanced content levelIntermediate to advanced
576 pages
30h 25m
English
Packt Publishing
Content preview from PostgreSQL 10 Administration Cookbook - Fourth Edition

How it works…

Suppose you change the value of a setting during your session, for example, by issuing this command:

SET work_mem = '16MB';

Then, the following will show up in the pg_settings catalog view:

postgres=# SELECT name, setting, reset_val, source                       FROM pg_settings WHERE source = 'session';    name   | setting | reset_val | source   ----------+---------+-----------+---------  work_mem | 16384   | 1024      | session

This will show until you issue this command:

RESET work_mem;

After issuing it, the setting returns to reset_val and the source returns to default:

  name   | setting | reset_val | source   ---------+---------+-----------+--------- work_mem | 1024    | 1024      | default
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Publisher Resources

ISBN: 9781788474924Supplemental Content