virtualbox just became slow
I've been happily running a virtualbox Windows XP machine (VM) on a Wheezy
host for eight months. However, the VM just became pathologically slow. For
example, if I boot the VM, call Photoshop 6, and open a small JPG, it all
works but takes several minutes. During much of this time the XP Task
Manager pins at 100% CPU usage, and the host's cooling fans are revving hard.
If I then ask to print the JPG, Photoshop (eventually) declares "There is not
enough memory for this operation". When the VM is idle, it shows about 5%
CPU usage and I see no unexpected memory hogs running. The Debian host runs
This disease roughly coincides with my upgrade from virtualbox 4.1.2 to
4.1.4, including the guest additions and extension pack. So I uninstalled
4.1.4 and put back 4.1.2 from snapshot.debian.org, together with its guest
additions and extension pack. I also put back a copy of the VM (xpvm.vdi)
and home vbox directories that I had saved on June 18th when everything was
fine. (I saved these as Linux files, not as a snapshot. I have successfully
started from them before). Finally I rebooted the host too. None of this
solved the problem.
The host is a Pentium 4 3.0 GHz with 2 GB of memory. The VM has the
recommended 192 MB of memory. This all worked fine until I ran apt-get
upgrade (including virtualbox) four days ago. I have a newer Wheezy machine
(i5 3.2 GHz + 4 GB) that is running about the same VM (also 192 MB) under
virtualbox 4.1.4 with no problem.
Any ideas how to identify the source of this slowness? Thanks.