Skip to Content
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...

Postgres stores the server start time, so we can access it directly, as follows:

postgres=# SELECT pg_postmaster_start_time(); pg_postmaster_start_time ----------------------------------------------2018-01-01 19:37:41.389134+00

Then, we can write a SQL query to get the uptime, like this:

postgres=# SELECT current_timestamp - pg_postmaster_start_time();        ?column? --------------------------------------------------------2 days 02:50:02.23939

Finally, we can apply some formatting:

postgres=# SELECT date_trunc('second',  current_timestamp - pg_postmaster_start_time()) as uptime;      uptime ----------------------------2 days 02:51:18
Become 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,
and much more.
Start your free trial

You might also like

PostgreSQL 13 Cookbook

PostgreSQL 13 Cookbook

Vallarapu Naga Avinash Kumar
PostgreSQL 9 Administration Cookbook - Second Edition

PostgreSQL 9 Administration Cookbook - Second Edition

Simon Riggs, GIANNI CIOLLI, Hannu Krosing, Gabriele Bartolini

Publisher Resources

ISBN: 9781788474924Supplemental Content