SUMMARY:

Special thanks to a bunch of people, you know who you are... most
provided the same general direction, but Michael Stier provided
step-by-step response. Turns out I was lost in 32-bit vs 64-bit
limitations, such as 2GB of swap being the max size available
-per-partition- and I need to change the drive setup a bit.

Thanks to everyone, you guys make this community work.

Angelo

>>
Solaris 2.6 (SunOS 5.6) is one of the major "transitory" releases,
between the 32 bit and 64 bit environments.

As to swap, I believe, but haven't confirmed, that swap partitions were
handled as 32bit signed integers, and thus limited to 2GB (4 million
block) in size.

Of course, multiple swap partitions/files could be created and SunOS 5
will balance across them.

Note: There is also an issue with older OBP not being able to 'savecore'
on systems where the primary swap partition is greater than 2GB.

Suggestion:
   Reboot to single user and run "swap -d /dev/dsk/c0t0d0s1".
   Run "format" and partition slice 1 to 1452 cylinders.
   Take the remaining 1452 cylinders and assign them to slice 4. (No,
slices (partitions) do not have to be consecutive on the drive.)
   Edit the /etc/vfstab file and copy the swap declaration line, and
create a swap declaration for slice 4.
   Run "/sbin/swapadd" to mount all swap space.
   Run "swap -l" to verify two swap slices, in the 4million block range.
   Exit single user, and continue normal operations.
<<



--- Original Post ----
I'm in a bit of a strange situation with a legacy box. It's running
2.6. The hardware is a 420R.

It has two 36G drives locally: c0t0d0 and c0t0d1.

The format of d0 looks like this:


Part      Tag    Flag     Cylinders         Size            Blocks
 0       root    wm       0 -  5807        8.00GB    (5808/0/0)  16779312
 1       swap    wu    5808 -  8711        4.00GB    (2904/0/0)   8389656
 2     backup    wu       0 - 24619       33.92GB    (24620/0/0) 71127180
 3        usr    wm    8712 - 24616       21.91GB    (15905/0/0) 45949545
 4 unassigned    wu       0                0         (0/0/0)            0
<snip>

Swap is thus c0t0d0s1, 4GB in size.

My relevant lines of /etc/vfstab shows:

/dev/dsk/c0t0d0s1       -       -       swap    -       no      -
swap    -       /tmp    tmpfs   -       yes     -

Running swap -l shows:
#swap -l

swapfile             dev  swaplo blocks   free
/dev/dsk/c0t0d0s1   32,1      16 4194272 4194176

BUT  df -k shows swap as hardly any space available:

Filesystem            kbytes    used   avail capacity  Mounted on
/proc                      0       0       0     0%    /proc
fd                         0       0       0     0%    /dev/fd
swap                   15904     120   15784     1%    /tmp

AND I'm getting the "out of swap" error in my syslog:
unix: WARNING: /tmp: File system full, swap space limit exceeded

This is driving me nuts. I'll summarize any good answers to this. I
know 2.6 is old, and I've mostly managed 2.8 boxes, so I won't promise
that I've not overlooked something elementary.

-Angelo
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