I opened an Incident with SAP as this could be a big issue for our PB 12.5.1 application recently migrated from PB 9.02 deployment. We are in the process of piloting our PB 12.5.1 application. We are using Pcode for a rather large application. Each end user makes a connection to Oracle 10g using the o10 DLL. The PB 9.02 version of the application, which the bulk of our users are still using, is running on an older version of the Citrix software. Our new pilot version is running under Citrix XenApp 6.5, Windows 7 and PB 12.5.1. I noticed another thread in this discussion group in which another PB user noticed a similar issue running a PB 12.5.1 Pcode application running under Windows 7. One of our Citrix Engineers just relayed the following observation to us.
"I have been watching the new NIS servers, and it would appear that the 12.5 version is using 2-3x more memory than the 9 version.
I would expect it to be the opposite. Where this is going to be challenging is, that it will take us from 13 servers to an estimated 40+.
If you are working with vendors, or other technical resources, maybe they have some recommendations.
I have taken our data to the VM team, and they are seeing similar on their side. So it doesnt look like its anything other than the
behavior of the application. A lot of page faults, and memory writes which is common for powerbuilder...almost uses no CPU, but memory.
I have seen 90-105 users on the old systems (prior version of Citrix server and PB 9.02 Pcode). With 25 users on the new (XenApp 6.5 - PB 12.5.1) server, we are at 90% memory use. I thought it was something not configured optimally on the hardware side, but after checking with VM team, it would appear that its just the behavior of the application. There is a significant difference in memory usage."