Take the 2-minute tour ×
Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

I have a VMWare VM I have to use for certain tasks at work. For some reason while the VM is running or suspended something is doing massive (in terms of operations, not Bytes/s) I/O on its .vmem file, making the system on that disk very sluggish.

Resource Monitor basically shows the culprit of the performance problems:

enter image description here

And the top spot in Disk Activity is always taken by the System process accessing said file.

enter image description here

Anyone knows what's going on here?

share|improve this question
    
delayed writes? –  Sathya Oct 30 '12 at 8:50
    
Half an hour after the VM was suspended? In packets of roughly 1 MiB/s? –  Joey Oct 30 '12 at 9:22
    
just guessing, maybe VMWare's scheduling writes when idle or the like. Curious to know the real reason too –  Sathya Oct 30 '12 at 9:37
    
I just tried whether it's the same after a restart, but got a Bluescreen when resuming the VM ... trying again now ;-) –  Joey Oct 30 '12 at 9:46
add comment

1 Answer

According to vmware forums you need to have this setting in your config.ini: mainmem.useNamedFile = "FALSE" to avoid this problem. VMWare would use the real RAM and page file with this setting turned false.

References:

  1. http://communities.vmware.com/message/1704684
  2. http://vmfaq.com/entry/25/
  3. http://faq.sanbarrow.com/index.php?action=artikel&cat=14&id=50&artlang=en
share|improve this answer
add comment

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.