SCCM 2012 – Client Installation properties - client cache size

Hi,

I'm setting the command line options for the client push install and taking into account the default client cache size is 5120MB. But my concern is a lot our servers and some workstations don't have enough free disk space for this.

So I was going to set the cache size to only use a certain percentage, say 10% for example:

SMSSITECODE=xxx SMSCACHEFLAGS=PERCENTDISKSPACE;NTFSONLY SMSCACHESIZE=10 SMSMP=FQDN-MP FSP=FQDN-FSP

So does it allocate 10% of the total hard disk size or 10% of the free disk space available?

Thanks