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

jxt@ornl.gov (TOLLIVER J S) (06/21/91)

ell, I once increased my paging space. Now I want to decrease it since
I've got a new external hard disk (in a separate volume group) upon
which I've enabled some paging space. I wish to decrease the paging
space on the internal 320MB disk so I can get some of that space
reallocated to /usr. But how? Deactivating the pagins space on HD6
with SMIT and rebooting doesn't do it. It seems that sometime during
reboot, the paging space on HD6 is used even if it is marked as
deactivated. Once activated, it cannot be reduced in size. It is
easy to activate and deactivate the paging space on my external
hard disk (with SMIT and rebooting, that is), but how can I tell
AIX to use only the HD9 paging space (that's what I called the partition
on the external drive that I marked as paging space) and not the
HD6 partition on rootvg?

Is this a maintenance mode problem? Can it be done even then?

Thanks,
Johnny Tolliver (jxt@ornl.gov)

rich@kunikpok.uucp (Richard Hasting) (06/23/91)

In article <1991Jun21.152819.14974@ornl.gov> jxt@stc06.ctd.ornl.gov (TOLLIVER J S) writes:
>Well, I once increased my paging space. Now I want to decrease it since
>I've got a new external hard disk (in a separate volume group) upon
>which I've enabled some paging space. I wish to decrease the paging
.
.
.
Everyone save this if you don't have it already.

To reduce a page space, you must deactivate it in smit via 
smit, physical, Page spaces, change PS...  Then, you must edit
/etc/rc.boot4 and change the swapon /dev/hd6 to swapon -a.
At that point, a bosboot -a should be run, followed by a reboot of the
system.  At that moment, the pagespace in question should be
deactivated.  You can then remove it from smit.  If the page space
removed happens to be hd6, then you need to create another hd6.
Without an hd6, maint mode will be a problem since it is hardcoded into
/etc/continue.  To create hd6, "smit", physical, logical VM, logical,
add a logical volume, and add to rootvg a LV named hd6 of type 
paging space.    Give it a size as well, and that should do it.


       Richard Hasting, Austin TX.  
       rich@kunikpok.uucp; ... !cs.utexas.edu!icus.com!kunikpok!rich
       What organization, I own the machine. 
       "We're on a mission from God." - Dan A.
-- 
       Richard Hasting, Austin TX.  
       rich@kunikpok.uucp; ... !cs.utexas.edu!icus.com!kunikpok!rich
       What organization, I own the machine. 
       "We're on a mission from God." - Dan A.