[comp.unix.aix] How to increase paging space?

uf738@cc.usu.edu (06/20/91)

I got the message "Paging space Low" while I was running a program in
a background (use &) on RISC/6000 320.  Can anyone tell me the procedure to
increase the size of the paging space (currently the size is 32 Mb)? And,
how much can I set the maximum to?  Real memory is 16Mb.

Thank you in advance.

Kridayuth Chompooming
c/o Civil Eng. Dept.
Utah State U., Logan, UT84322
email: uf738@cc.usu.edu

drake@drake.almaden.ibm.com (06/20/91)

To increase the size of your paging space:

Become superuser
Run "smit"
Select "Physical and Logical Storage"
Select "Paging Space"
Select "Change/show characteristics of a paging space" to modify an existing
 one, or "Add Another Paging Space" to create another one.
Fill in the blanks and press Enter.

That's it!


Sam Drake / IBM Almaden Research Center 
Internet:  drake@ibm.com            BITNET:  DRAKE at ALMADEN
Usenet:    ...!uunet!ibmarc!drake   Phone:   (408) 927-1861

oasis@gary.watson.ibm.com (GA.Hoffman) (06/20/91)

Increasing pgspace is straight forward with smit ..
it tends to be a good idea to use smit for the things
it does well.  If you have more than one disk, try to
spread the increase around to pgspace's on each disk.

Real memory size has little to do with how big to size
your pgspace... on the high end of its size you want 
to consider total disk space available.  On the low end,
you need enough to keep your workload from starving, as
you currently are.  I tend to increase pgspace on machines
in 50% size increments, but I have all the disks I could
want.
g
-- 
gary a hoffman
RISC Systems, Watson Research

artc@bacchus.epps.kodak.com (Art Campbell) (06/21/91)

In article <860@rufus.UUCP>, drake@drake.almaden.ibm.com writes:
|> To increase the size of your paging space:
|> 
|> Become superuser
|> Run "smit"
|> Select "Physical and Logical Storage"
|> Select "Paging Space"
|> Select "Change/show characteristics of a paging space" to modify an existing
|>  one, or "Add Another Paging Space" to create another one.
|> Fill in the blanks and press Enter.
|> 
|> That's it!
|> 
Well, yeah, that's it unless you're out of unallocated space... Is there a way
to reduce a partition's allocation to create unallocated space which can be
turned into paging space? We've been taping partitions off, and rebuilding, 
which isn't as much fun as the very elegant SMIT interface (that's a pat on
the back guys!)

julie@levell.austin.ibm.com (Julie A. Levell) (06/22/91)

In article <5496@atexnet.Atex.Kodak.COM> artc@bacchus.atex.kodak.com writes:
>In article <860@rufus.UUCP>, drake@drake.almaden.ibm.com writes:
>|> 
>Well, yeah, that's it unless you're out of unallocated space... Is there a way
>to reduce a partition's allocation to create unallocated space which can be
>turned into paging space? We've been taping partitions off, and rebuilding, 
>which isn't as much fun as the very elegant SMIT interface (that's a pat on
>the back guys!)

Well, then you're talking about a command that doesn't exist "reducelv".
There are low level (undocumented!!) commands (lreducelv) but they don't
handle odm and you're on your own when you decide which partitions to
delete from your filesystem or paging space.  Neither of those works for
reducing at this time. :-{ 

Sounds like you are doing the right (painful, I know) procedure to
free space on your system.   


-- 
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Julie A. Levell  IBM  Austin, Texas      Internet: julie@aixwiz.austin.ibm.com
IBMNET: JULIEL at AUSVMQ 4C-29/994       SpeakNet:  823-5178 (Tie 793-5178)
"Let's use the ODM Interface"  Commander William Riker  STTNG  "The Nth Degree"

drake@drake.almaden.ibm.com (06/22/91)

There's currently no simple way to reduce the size of a logical volume.


Sam Drake / IBM Almaden Research Center 
Internet:  drake@ibm.com            BITNET:  DRAKE at ALMADEN
Usenet:    ...!uunet!ibmarc!drake   Phone:   (408) 927-1861