topic Re: Swap, VGCreate and Memory in Operating System - HP-UX

Swap, VGCreate and Memory

Bona_1 — Tue, 20 Apr 2004 01:52:46 GMT

Hello People,
three questions this time around.
1) How do I increase my swap space? Will a simple lvextend on /vg01/lvol2 be sufficient?

2) How do I check the memory size?

3) (Most Important) I am trying to create more than 10 VGs. Now, I have already increased the maximum VGs parameter to 20, but I seem to be having some problems choosing major and minor numbers. (Mknod command et all). Can anyone assist me as to what major and minor number I can use when I have used the first 10 major and minor groups (0x000000-0x090000)

Thanks

Re: Swap, VGCreate and Memory

KapilRaj — Tue, 20 Apr 2004 01:57:04 GMT

1. No. you will need to have contegious space for this; I have documented this in forums before search for it / use ignite

2. dmesg |grep -i physical

3. 0x000000-0x190000

Regds,

Kaps

Re: Swap, VGCreate and Memory

KapilRaj — Tue, 20 Apr 2004 01:58:30 GMT

Sorry missed something in Point No.1 You can add another SWAP lv instead of playing around with Primary swap which is easy and doens'nt need system, to be down

Kaps

Re: Swap, VGCreate and Memory

Bona_1 — Tue, 20 Apr 2004 02:00:39 GMT

And How do I do that Kaps? Some hints would be nice. ;-)

Bona

Re: Swap, VGCreate and Memory

T G Manikandan — Tue, 20 Apr 2004 02:05:59 GMT

Leave the primary swap as it is.
Do not push more I/O on the root disk.Also,it is best that the primary swap is kept as minimum as possible,

Now,Just create a new volume on a other disk on the machine and use it as swap.

If you have increased the maxvgs parameter,
0x000000 -0x090000 - 10
0x0a0000 -0x0f0000 - 5
0x100000 - 0x140000 -5

Re: Swap, VGCreate and Memory

KapilRaj — Tue, 20 Apr 2004 02:09:11 GMT

If you have space available,

1. Create a logical volume (Recommended same size as the poriomary swap)
2. swapon

Why not do it through sam it would be better if you have'nt worked on commands

Regds,

Kaps

Re: Swap, VGCreate and Memory

Steve Post — Wed, 21 Apr 2004 07:29:53 GMT

3. what comes after
mknod /dev/vgent/group c 64 0x090000 ?

that would be....
mknod /dev/vgent/group c 64 0x0a0000
then 0x0b0000, 0x0c0000, 0x0d0000, 0x0e0000, and 0x0f0000.
Now you need to add a 16th volume group?
that would be...
mknod /dev/vgent/group c 64 0x100000

Note it's 0x##0000. Where ## is a hexidecimal number.

And this assumes you do not exceed the max volume groups allowed per the kernel parameter (whatever it is).

steve