PSQL Connect To AWS Redshift From Windows 10 PowerShell

Coming from a completely Linux background, I was tasked with connecting to a aws redshift cluster or a postgres cluster via Windows powershell and PSQL. I knew it was possible and searching the internet came up with CMD prompt solutions, when I attempted via powershell, I was faced with the following error:

Turns out a colleague of mine and I figured out you will need to set the variable PGCLIENTENCODING via the powershell command line. This was expected but we could not nail down the syntax, we found it.

Once this is set, you can connect to PG as normal.

POSTGRES – Top 100 Tables In Tablespace

I had a situation where I needed to find the top 100 largest tables in a certain tablespace on a postgres 9 database, in my case we archive tables into an archive1 tablespace. This query will find all the largest relations in the archive1 tablespace. Its important to swap out ‘archive1’ with whatever tablespace you are trying to list.

Hope this helps you out, took some time to get it to work.

Nagios Check Postgres Table Date Column Against now()

I had a situation where a daily sync of a table from one database to another was failing. This table was updated daily so the query should return something like this when it was synced correctly:

I use Nagios very heavily and I setup a custom plugin to check the query’s date against today’s date, this should warn or critical based on user supplied arguments. Here is what a failure looks like when running from the nagios servers command line. This worked well at alerting me when the sync failed, this was integrated into the nagios subsystem and emails and slack alerts are generated as expected.