Performance issue with 4.2.1

Mathew, Sunil smathew at
Wed Oct 5 20:28:47 UTC 2022

We are using t3.xlarge and no significant spike in CPU while running performance testing.


From: users <users-bounces at> on behalf of John C. Pfeifer via users <users at>
Date: Wednesday, October 5, 2022 at 4:17 PM
To: Shib Users <users at>
Cc: John C. Pfeifer <pfeifer at>
Subject: Re: Performance issue with 4.2.1
We are running our 4.2.1 IdP in AWS (SAML & CAS, w/ LDAP) with no issues. It is essential that you properly size the AWS instances (our tomcats run on t3.large). If you run out of CPU credits or IO credits, your performance will fall off the proverbial cliff. This can be seen in the metrics available on the AWS console.

John Pfeifer
Division of Information Technology
University of Maryland, College Park

On Oct 5, 2022, at 3:20 PM, Mathew, Sunil via users <users at<mailto:users at>> wrote:


We currently have Shibboleth IdP 3.1.1 on-prem that is protected by CAS using remote user as principal. We are seeing significant performance issues with the 4.2.1 version deployed in AWS cluster and also in on-prem on a single server. Here are the numbers:

Please let me know if anyone has noticed performance issues with the 4.2.1 version of Shibboleth IdP?


For Consortium Member technical support, see<>
To unsubscribe from this list send an email to users-unsubscribe at<mailto:users-unsubscribe at>

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <>

More information about the users mailing list