Sun-4 acting up.

[Barry Comer]

Our Sun-4 has been acting up over the last 3 weeks, most of the time it just
locks up and must be reset. I noticed that when doing a df command it lists
the swap space as follows:

Filesystem            kbytes    used   avail capacity  Mounted on
/dev/xy0e             120753  120724       0   111%    /export/swap

My question is this:
Does Sun-OS allocate this space and use it on demand, or do we have a 
swap space problem? There are 2 Sun 3\60's using the Sun-4 as their file
server. 

Thanks in advance 
Barry