On Wed, 2004-02-11 at 10:52, Brian France wrote: > At 10:59 AM 2/11/2004, Ferguson, Neale wrote: > >How big is the machine (real and virtual)? > > I have 2 gig allocated to the IFL. In my USER DIRECT I have 2 gig > allocated to this image. WCBE requires 1 gig and my e folks stated that 2 > would be best.
They're lying to you. Linux *needs* a lot less storage than people are always demanding for it, and this ain't an Intel environment where memory is cheap and no one else is using it. Linux will happily "use"--from VM's perspective--whatever you give to it. Most of that will be file and buffer caches, which are completely counterproductive to cache in a Linux/390 environment. You really don't want to minimize disk access at the cost of all your systemwide performance. Give the image 384MB initially, plus plenty of swap-on-VDISK. Run for a bit, and tune the image by nudging up the memory dedicated to it until it's just-a-little into swap. Use the *second* line of the output of "free"--*NOT* the first--to see what the right size is. This will make both that guest and all other guests run a lot better. Adam
