Path: utzoo!mnetor!uunet!lll-winken!lll-lcc!ames!pasteur!ucbvax!Venus.YCC.Yale.EDU!LEICHTER
From: LEICHTER@Venus.YCC.Yale.EDU ("Jerry Leichter ", LEICHTER-JERRY@CS.YALE.EDU)
Newsgroups: comp.os.vms
Subject: re: INSTALLED IMAGE question
Message-ID: <8805031754.AA13916@ucbvax.Berkeley.EDU>
Date: 3 May 88 16:44:00 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 18


	When one or more users run an image that is installed, who's Working
	set quota get's debited, or do each of the user's quotas get charged,
	or do no charges result (assuming it was installed /shared).

The pages from installed images are charged to the working set sizes of each
of the processes that map to them and then fault pages in.

							   Is there a way
	to have very popular images (like emacs) reside in memory (if space is
	available) even though no one may currently be running that image?
	Would there be any reason to do this (i.e. speed of execution)?

Install the images /OPEN/HEADER_RES.  This will keep the file open permanently
and keep the image header resident.  There is no explicit way to force the
pages of the file to remain resident, but if there is enough memory they
usually will anyway.  Let the pager worry about it....

							-- Jerry