alan@shodha.enet.dec.com ( Alan's Home for Wayward Notes File.) (03/18/91)
In article <77136@bu.edu.bu.edu>, jdh@bu-pub.bu.edu (Jason Heirtzler) writes: > The man page for pstat refers to the "-s" option as follows: > > [ Customer quotes the -s option from the pstat(8) manual page > wherein something called "argdev" is mentioned". ] > > So what exactly are "pages allocated to argdev"? Here's what it looks > like on one of our machines (DECstation-3100, Ultrix 4.0) Once upon a time the virtual memory used to do command line argument processesing was backed by disk blocks from a special swap device; argdev. If you wanted to you could point some- where other than the usual page/swap device in the configuration file. A few versions ago this feature was removed or made unnecessary. Appearantly the manual page was never updated. > > /etc/pstat -s > 141751k swap configured > 115867k reserved virtual address space > 34164k used (9760k text, 0k smem) > 31364k free, 2056k wasted, 76223k missing > avail: 975*32k 164*1k > > So, "76223k missing" sounds like a lot of space. Typical reason for having lots of page/swap space missing is that you've specified an extra device for page/swap in the configuration file, but haven't added a line to /etc/ fstab to turn on paging/swapping on it when swapon(8) runs. In the configuration you might say: config vmunix root on rz0a swap on rz0b and rz1b and rz2b In /etc/fstab you'll have line like: /dev/rz1b::sw:0:0:ufs:: for the first secondary page/swap space, not one for the 2nd. You don't need one for the primary page/swap. Add a line for the missing space: /dev/rz2b::sw:0:0:ufs:: And run swapon. You'll probably get a "device mounted" message for the one already in use. > > ------------------------------------------------------------------- > Jason Heirtzler (617) 353-2780 jdh@bu-pub.bu.edu > Information Technology Boston University ..!bu.edu!bu-pub!jdh -- Alan Rollow alan@nabeth.cxn.dec.com
jdh@bu-pub.bu.edu (Jason Heirtzler) (03/18/91)
The man page for pstat refers to the "-s" option as follows:
+ The number of pages free, wasted, or missing. Free
pages are pages that have not been allocated. Miss-
ing pages are usually allocated to argdev. Wasted
pages indicate the amount of space lost because the
swap space is fragmented.
So what exactly are "pages allocated to argdev"? Here's what it looks
like on one of our machines (DECstation-3100, Ultrix 4.0)
/etc/pstat -s
141751k swap configured
115867k reserved virtual address space
34164k used (9760k text, 0k smem)
31364k free, 2056k wasted, 76223k missing
avail: 975*32k 164*1k
So, "76223k missing" sounds like a lot of space.
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Jason Heirtzler (617) 353-2780 jdh@bu-pub.bu.edu
Information Technology Boston University ..!bu.edu!bu-pub!jdh sac@decuk.uvo.dec.com (Stephen A Carpenter) (03/19/91)
Sounds like you have a swap device configured into the kernel but not entered into the /etc/fstab file. Swap entries in the fstab file should look like :- /dev/ra10b::sw:0:0:ufs:: -- Stephen Carpenter sac@decuk.uvo.dec.com UK Ultrix Support Digital Equipment Corporation