benw@desoto.UUCP (B Weber) (08/03/84)
We are running USG UNIX 5.0 on a VAX 11/780, and are gearing up to run some huge (~6 Meg) programs on the system. Our current limit to the number of users is our swap space...even though we have 16Meg of swap, we will not have enough to run the number of concurrent programs we need. I have heard that this 16 Meg swap space on the VAX is an absolute limit, bound by the representation of the number of clicks (512 byte blocks) representable by a short integer. Is there any truth to this? Is anyone running on a VAX with a larger swap space, or diddled with the OS to allow for larger? Also, how big a swap map must go with it? By the way, to cut off the usual responses, we can't make the programs smaller or switch machines! Thanks, Ben Weber pyuxmm!benw AT&T Technologies Piscataway, NJ
matt@oddjob.UChicago.UUCP (Matt Crawford) (08/04/84)
We have about 80 Mb of swap space on 3 disk drives here. People hog a lot of virtual memory when doing 3-D galaxy formation calculations and stellar evolutions. We run 4.2, which you did not rule out as a solution to your problem. ___________________________________________________________ Matt University ARPA: crawford@anl-mcs.arpa Crawford of Chicago UUCP: ihnp4!oddjob!matt