Swap, VGCreate and Memory

[Bona_1]

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

[KapilRaj]

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

[KapilRaj]

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

[Bona_1]

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

Bona

[T G Manikandan · Accepted solution]

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

[KapilRaj]

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

[Steve Post]

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