RE: First time buying System i5

From: Lukas Beeler

We have several 520 running for 5-10 users with 1GB of RAM, and they
usually have the admin-Server (needed to setup SSL for CA and such)
running. Clicking on a link takes 10-30 seconds till you get a page,
while the whole machine grinds to a halt.

The adminconsole is a hog no matter what.  You cannot use it to measure
performance.

I run lots of JSP-based applications on a model 520 with 1GB of memory and
have no problems, and that's using WAS.  I suggest 2GB to give yourself a
little breathing room and then create a separate memory pool for your
application server.  You can either use a shared pool, or you can create a
dedicated pool for the subsystem using the CHGSBSD command.  Start with
500MB and see if you need more; my guess is with Tomcat you won't.

Joe