Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.2 9/18/84; site codas.UUCP
Path: utzoo!watmath!clyde!bonnie!akgua!akguc!codas!mikel
From: mikel@codas.UUCP (Mikel Manitius)
Newsgroups: net.unix-wizards
Subject: Re: Intermittant lockup of VAX
Message-ID: <152@codas.UUCP>
Date: Sat, 5-Oct-85 19:01:04 EDT
Article-I.D.: codas.152
Posted: Sat Oct  5 19:01:04 1985
Date-Received: Mon, 7-Oct-85 04:03:04 EDT
References: <313@cylixd.UUCP> <1754@brl-tgr.ARPA>
Organization: AT&T Information Systems (SDSS) - Orlando
Lines: 26

> > Here's the problem.  On a very intermittant occasion, our 785 will hang
> > anywhere from 5 to 15 minutes.  During this time, nothing entered at
> > either a terminal or the console will be processed even though characters
> > are echoed back showing what you typed.  After the elapsed time has passed,
> > all processing continues as if nothing had ever happened (including a
> > flood of responses to the commands you typed in while the system was hung).
> 
> I don't know if this is it, but we have had trouble with FREEMEM
> delays when some core hog (SmallTalk in our case) causes the paging
> disk to be rearranged.  This hasn't lasted more than a minute or so
> when I've noticed it here.
> 
> Down with kernel garbage collection!

Check to see if you have any high speed lines connected to an
interrupt driven port, or even a 1200 baud line could do it,
we once had the probelm at RPI with a Vax 11/780, an IBM 3081D
was spitting junk at our interrupt driven port and would completely
monopolize the CPU.
-- 
                                        =======
     Mikel Manitius                   ==----=====    AT&T
     (305) 869-2462 RNX: 755         ==------=====   Information Systems 
     ...{akguc|ihnp4}!codas!mikel    ===----======   SDSS Regional Support
     ...attmail!mmanitius             ===========    Altamonte Springs, FL
     My opinions are my own.            =======