On Sat, Mar 1, 2008 at 9:55 PM, Hamilton, Brian <[EMAIL PROTECTED]> wrote:
> - you only have 8gb of central and 512mb of expanded storage > however you have 6 linux instances running each defined at 2gb…how is VM > managing that, especially when you only have 8gb of central? > > - how and when does the 512mb of expanded storage come into play? > > - how and when does the paging volumes come into play? > > - big question how many more linux instances can be built at 2gb > each? John is very right that you should not define additional guests now. I would say you need to go back and define paging space. The only reason you have no problems now is because the Linux guests are so big they have not seen data yet to use the memory you gave them. Once they do (and eventually they will) then you will find 16 GB does not fit in 8 GB. And since you have not even enough paging space, your system will abend in the near future. I compare this with a bucket of water on the table. You can push it pretty far, until at one point very suddenly it falls over the edge. When the system pages (and you eventually must, to make things cost effective) you must be prepared to have enough paging space to hold all virtual memory you promise to your Linux guests. And for performance reasons you want paging space used at most 50%. So each new 2G server requires 2 more 3390-3 page packs. Simple math. Proper sizing and tuning is needed to make it work well. You need a performance monitor to tell whether you've done it right. Rob -- Rob van der Heij Velocity Software, Inc http://velocitysoftware.com/
