On 10/06/2017 01:41 PM, Ed wrote:
On 10/06/2017 03:14 PM, Mike Keehan wrote:
On Fri, 6 Oct 2017 12:17:26 -0400
Ed <e...@edjusted.com> wrote:

On 10/06/2017 12:10 PM, Mike Keehan wrote:

Wouldn't it be possible to add a second Firewall VM to be used
solely by your special single vm?

Yes I believe this would def work, and also should be
automatic/reliable across reboots, but I was really hoping to not
give up 2-4GB of RAM just for this purpose.

I think you will find that the firewall VM runs OK in just 500Mb, maybe
less.  Search the mail list for "vm memory" - there have been a number
of discussions about how much is actually used by the system VMs.  (I
can't remember the details off hand, or I would give more info!)

It is worth knowing that although a VM is initially set up with a 4Gb
memory allocation, it only uses what it needs.   The rest is still
available to the other qubes etc.


You know that's not a bad point.  I never really looked into reducing the memory allotment.  I just know anecdotally on my systems the firewall vm's use 2-3GB (when left with the default max of 4GB).  I also know they will run on less if I'm pushing a system out of memory but I never though to just restrict them to less to start.

I'm not really strapped for memory on the machine I'm working with here so it does look like adding an additional firewall VM would be the easiest way to get what I want, it just seemed a tad wasteful to me, but perfect is the enemy of good....

Appreciate the input!

IMO, it's best to leave memory management to the OS until such time as a definite problem is found (which would most likely show up as swapping, which would cause massive performance problems).

I suspect you'd find if you looked closely at the vm that most of the memory used is for caching. That's a good thing. No point having memory sit unused and forcing to to keep downloading the same files. The moment the cache is needed for something else, it'll be reallocated.


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