Swap happens under heavy load. At some point you hit a barrier that caused things to swap. Using swap in and of itself is not bad, and it is to be expected. Actual SWAPPING (happening all the time) means you're out of RAM, AND that's bad.
If you would like to talk to me directly about this, let me know. While I am not as good on the internals as The Big Brains on this list, I am certainly in the top on the IT end of it.
(Hi, Greg...you know what you did...)
Sent via the Samsung GALAXY S®4, an AT&T 4G LTE smartphone
-------- Original message --------
From: "Campbell, Lance" <lance@illinois.edu>
Date: 05/10/2016 3:25 PM (GMT-06:00)
To: "'pgsql-admin@postgresql.org'" <pgsql-admin@postgresql.org>
Subject: [ADMIN] Memory and Swap
PostgreSQL 9.5.2
Linux Red Hat
I have 10 G of memory. Nagios is saying I have 2 G used and 8 G free.
Yet my swap is at 1 G.
1) Why is that?
2) Over that past week it has climbed from almost nothing to 1 G. It is a steady climb. No big jump.
Thanks,
Lance
Journyx, Inc.
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