/proc size increase to huge number

[microsky]

I found a problem on our Sun E450, sometimes the size of directory /proc increase to very large number and it shall fill up the root file system size untile root file system size reach 100% usage, so the system shall hung up because can not write tmp file into root file system.
Have any suggestion for this problem ? How can I know which process did it or how to stop it?

Thanks,
microsky

 

[bluelake]

/proc should be a pseudo file system... paste the result of df -k