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Conference vaxaxp::vmsnotes

Title:	VAX and Alpha VMS
Notice:	This is a new VMSnotes, please read note 2.1
Moderator:	VAXAXP::BERNARDO

Created:	Wed Jan 22 1997
Last Modified:	Fri Jun 06 1997
Last Successful Update:	Fri Jun 06 1997
Number of topics:	703
Total number of notes:	3722

323.0. "AutoGEN setting GBLPAGES to ~2X size of memory" by CSC32::D_BROWN (Dave Brown CSC-VSG/INTDRV) Thu Mar 13 1997 10:46

    
    
    	I am working with a customer who is running Alpha V6.2-1H3  and who
    pointed out the following oddity. I then checked on my VAX 7.1 system
    and saw the same thing.
    
    	AutoGEN is setting GBLPAGES for ~1.91 times the quantity of
    available pagelets. On his Alpha, he has 1310720 pagelets of physical
    memory and AutoGEN set GBLPAGES to 2485000. On my VAX, I have 32768
    pages of memory and AutoGEN set GBLPAGES to 63600.
    
    	The customer is concerned that AutoGEN has lost its grip. Could
    someone explain why AutoGEN is setting GBLPAGES so high?
    
    	Thanks,
    
    	Dave

T.R Title User Personal
Name Date Lines

323.1 EVMS::KUEHNEL Andy K�hnel Thu Mar 13 1997 15:55 5

T.R	Title	User	Personal Name	Date	Lines
323.1		EVMS::KUEHNEL	Andy K�hnel	`Thu Mar 13 1997 15:55`	5
	AUTOGEN uses the size of the pagefile as the first approximation for GBLPAGES. After all, global pages are pageable, and people are usually annoyed when they get too few. Having too many global pages is rarely a problem because the global page table starts out as DZRO pages: what you don't use is almost free.

    AUTOGEN uses the size of the pagefile as the first approximation for
    GBLPAGES.  After all, global pages are pageable, and people are usually
    annoyed when they get too few.  Having too many global pages is rarely
    a problem because the global page table starts out as DZRO pages: what
    you don't use is almost free.