memory mapped files (fwd)

H.-J. Werner werner at tc2.theochem.uni-stuttgart.de
Thu Oct 25 11:41:09 BST 2001


No, we don't use memory mapped files. But each Unix system 
buffers I/O in unused memory, and this is probably what
you see. On some systems there are system kernel parameters
that allow to modify the max amount of memory used for this
buffering.
Regards,
H.-J. Werner
> 
> Dear MOLPRO users,
> 
> does MOLPRO (specifically MOLPRO 2000.9 on IBM Power3) 
> use memory mapped files?
> 
> If yes, how can I influence which kind of memory mapped
> files are used and how much of the physical memory is
> used?
> 
> Background:
> On a machine with four processors, I use one and three
> are used by other users. My MOLPRO job fills up the
> memory with its files but commands like ls don't show
> these files. Thus, there is little or no control for
> me or even the operating system, about how many of the 
> ressources my job uses. This leeds to conflicts with the
> other user's jobs.
> 
> Ludger Palm
> 


--
Prof. Hans-Joachim Werner
Institute for Theoretical Chemistry
University of Stuttgart
Pfaffenwaldring 55
D-70569 Stuttgart
Tel: (0049) 711 / 685 4400
Fax: (0049) 711 / 685 4442
email: werner at theochem.uni-stuttgart.de



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