As a follow on from my previous post we can do some neat calculations on the amount of data stored in MOSS personal sites using Powershell.

Using the measure-object CmdLet against the StorageUsedMB property we can calculate the number of personal sites (+1 one as it includes the root site), average size of of each site, smallest, largest and total storage size of all sites.

Again assuming http://sps:20488 is where your personal sites are hosted

PoSH C:\demo> $output=stsadm -o enumsites -url "http://sps:20488"
PoSH C:\demo> $xml=[XML]$output
PoSH C:\demo> $xml.sites.site | measure-object storageusedmb -min -max -sum -average | format-table

Count Average Sum Maximum Minimum Property
----- ------- --- ------- ------- --------
5      0.62   3.1 0.7     0.4     StorageUs...

To get a list of the sites in question with the largest at the top use -descending on the sort CmdLet:

PoSH C:\demo> $xml.sites.site | sort storageusedmb -descending | select url, owner, storageusedMB | format-table

Url                         Owner                    StorageUsedMB
---                         -----                    -------------
http://sps:20488/person... CONTOSO\mike               0.7
http://sps:20488/person... CONTOSO\jeff               0.7
http://sps:20488/person... CONTOSO\administrator      0.7
http://sps:20488           CONTOSO\administrator      0.6
http://sps:20488/person... CONTOSO\brianb             0.4

And if you just want the top 2 offenders us the -first option on the select-object CmdLet

PoSH C:\demo> $xml.sites.site | sort storageusedmb -descending | select url, owner, storageusedMB -first 2 | format-table

Url Owner StorageUsedMB
--- ----- -------------
http://sps:20488/person... CONTOSO\mike 0.7
http://sps:20488/person... CONTOSO\jeff 0.7

Obviously in real life those figures would be a lot larger!