Squid 1.1.22 dies on USR1 kill

We have a 20Gig cache running squid 1.1.22 under Solaris 2.55.
The cache is showing that is running with about 200 + Meg of Memory
There seems to be plenty of Swap free (about 200Mb)
But when we cycle the logs on a daily basis it crashes with the
following error messages :-
ftpInitialize: fork: (12) Not enough space
Failed to fork() for ftpget
and then dies.
There should be enough space the partion is 30gig?
And there is plenty of swap?

Any ideas?
Have I missed something obvious?

    Bruce Hodge Infrastructure Group
    Bruce.Hodge@newcastle.edu.au University of Newcastle
    ccdbh@cc.newcastle.edu.au Fax (02)4921 6910
                                               Ph (02)4921 5563
                                       
        

    
    
    
    
Received on Tue Jul 21 1998 - 16:00:38 MDT