Errr... yeah - them too... The problem will be when you've allocated huge vdisks for all your production systems based on the old "Swap = 2X main memory" ROT. In that example - you're basically tripling your overcommit ratio by including the vdisks. This also can have a large cost in terms of CP memory structures to manage those things.
The current guidance is a smallish vdisk for high priority swap space, and a largish low priority real disk/minidisk for occasional use by badly behaved apps. Swapping to the vdisk is fine in normal operations, swapping to the real disk should be unusual and rare. So - overcommit ratio is calculated as follows: ( Sum ( guest virtual storage sizes ) + Sum ( vdisk sizes ) ) / central storage Anything else I've forgotten? -- Jay Brenneman
