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From: jeh@crash.CTS.COM (Jamie Hanrahan)
Newsgroups: comp.os.vms
Subject: Re: Error INSVIRMEM
Message-ID: <1743@crash.CTS.COM>
Date: Sun, 20-Sep-87 14:59:20 EDT
Article-I.D.: crash.1743
Posted: Sun Sep 20 14:59:20 1987
Date-Received: Mon, 21-Sep-87 00:43:44 EDT
References: <8709192235.AA10931@ucbvax.Berkeley.EDU>
Reply-To: jeh@pnet01.CTS.COM (Jamie Hanrahan)
Organization: Simpact Associates, CA
Lines: 49
Keywords: AUTOGEN SYSGEN VIRTUALPAGECNT
Summary: Use AUTOGEN and reboot to change VIRTUALPAGECNT

In article <8709192235.AA10931@ucbvax.Berkeley.EDU> F31HEI@DHHDESY3.BITNET writes:
> ... SHOW LOGICAL gives the error message:
>  %LIB-F-INSVIRMEM, insufficient virtual memory
> ...
>In SYSGEN the VIRTUALPAGECNT Parameter is set to
>Current=50000,default=8192,minimum=512,maximum=300000 pages
>Setting it to 300000 does not help.
>System page file is 20000 blocks, swap file is 6000 blocks.
>Also there are parameters PGFLQUOTA and WSQUOTA.  Since I'm totally
>new in system management on a VAX I have no idea which parameter
>I have to change. Any help to this problem is welcome...

Jerry Leichter's comments on this issue are correct.  A couple of things
in your query prompted me to add a few things:  

If you're that new to VMS system management, you may be unaware that
you can't change VIRTUALPAGECNT just by doing a SET command in SYSGEN.
At minimum you have to 

	SYSGEN> SET VIRTUALPAGECNT new_value
	SYSGEN> WRITE CURRENT   ! writes the system image with the new value
				! to disk
...then shut down and reboot your system.

But I said "at minimum".  VIRTUALPAGECNT is one of the parameters you
should never change (at least not to increase it, certainly not to
increase it by a factor of 6) directly through SYSGEN.  Instead you
should edit the file SYS$SYSTEM:MODPARAMS.DAT, adding the line

ADD_VIRTUALPAGECNT=increment

to the end; then use the AUTOGEN command procedure to generate new
SYSGEN parameters:

$ @SYS$UPDATE:AUTOGEN SAVPARAMS REBOOT

The above command will reboot your system automatically with the
new parameters.  There are other options for the less confident;
check the AUTOGEN documentation.  

The reason for using AUTOGEN is that increasing VIRTUALPAGECNT 
increases the number of physical pages of memory required to map
the process headers for your balance set.  If you make the combination
of VIRTUALPAGECNT and BALSETCNT Too Big, you'll have an unbootable 
system.  

	--- Jamie Hanrahan
		jeh@pnet01.cts.com or pnet01!jeh@crash.cts.com
		...sdcsvax!crash!pnet01!jeh