topic Second swap area in Operating System - HP-UX

Second swap area

Gustavo Souza Lima — Wed, 10 Jan 2007 08:24:01 GMT

I need to create a second swap area on my HPUX 11iv1 and I would like to know which kernel parameters I must change.

My old swap area has 8Gb and my new area needs to have 24GB.

Re: Second swap area

Coolmar — Wed, 10 Jan 2007 08:28:37 GMT

Hi, do the following:

# lvcreate -C y -r n -L 24576 -n lvolx /dev/vg0x

# swapon -p 0 /dev/vg01/lvol1

Then add your new swap device to your /etc/fstab

Also note, that with swapon -p 0 means that this new swap will take priority over your first one. You can put the priority to whatever you like.

Re: Second swap area

Peter Godron — Wed, 10 Jan 2007 08:28:57 GMT

Hi,
it depends on where/how you want to create the new swap area.
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=977181
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=99017
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=95495

or use SAM to create a new swap area.

Re: Second swap area

RAC_1 — Wed, 10 Jan 2007 08:30:28 GMT

maxswapchunks - Max swap space configured.
Also check swchunk - single swapchunk size

Re: Second swap area

Rita C Workman — Wed, 10 Jan 2007 08:31:16 GMT

Hi Gustavo,

Go to the top line here where it says SEARCH: and type....'add swap" or "additional swap" or "configure swap" and you will find a plethora of instructions on doing this !

Tip: Always add swap in equal increments. So you have 8gb set up. To get to 24Gb, add two more lvol's for swap at 8Gb each.
That is if your using disk swap and not file system swap. I prefer disk myself.

Kindest Rgrds,
Rita

Re: Second swap area

DCE — Wed, 10 Jan 2007 08:37:03 GMT

the kernel parameters that affect max swap size are swchunk and maxswapchunks

If are going to change them, make them larger than you need, so you will not have modify the kernel again