SP3 / shibd swap usage on RHEL9

[John Salter]

> The most likely cause would be the use of metadata aggregates - If that is the case then its like you are holding all the information about everybody in memory all the time.  > If this is the case then you should probably look at using an MDQ feed [1].

Hi Rod,
Thanks for the suggestion. MDQ was already on my list of things to investigate at some point - I thought it was a 'round 2' type task. I've reconfigured to use MDQ and it has fixed the issue.

>From further observations, it looks like the swap usage may be 'normal'. When the system was idling (no one logging in via Shibboleth) swap usage maxed-out at 2.4G. At that point the shibd RAM usage was ~0.
If I made some Shib requests, some swap was released, and RAM was consumed. 

Many thanks for the speedy reply and help.
Cheers,
John