topic Re: Device swap in Operating System - HP-UX

Device swap

Ashish_29 — Tue, 01 Mar 2005 11:12:42 GMT

One LVOL was created of 10GB as secondary device swap.

later extended the same volume to 15GB from SAM. While executing 'swapon' it says paging is already enabled.

But swapinfo shows the available swap space is 10GB.

How to enable the rest 5GB space for swap?

Re: Device swap

RAC_1 — Tue, 01 Mar 2005 11:15:05 GMT

If swap space is used from that lvol, you can not doo that on the fly. You will have to reboot. (Also need to tune maxswapchunks parameter)

Anil

Re: Device swap

TwoProc — Tue, 01 Mar 2005 11:21:28 GMT

I don't think you're going to get it until a reboot. For that reason - in the past when I've needed more swap, I've generally made a "tertiary" secondary swap. But, I think I've always assumed that it wasn't do-able to extend swap in the same lvol live, and therefore have never tried it.

Re: Device swap

A. Clay Stephenson — Tue, 01 Mar 2005 11:28:07 GMT

This can only be done via a reboot. I hate to think that you actually need this much swapspace because if you do, your performance is absolutely terrible.

Re: Device swap

A. Clay Stephenson — Tue, 01 Mar 2005 11:31:54 GMT

It's also a good idea to check your current maxswapchunks kernel tunable because otherwise it might require two reboots.

Re: Device swap

HGN — Tue, 01 Mar 2005 13:24:37 GMT

Hi

Enabling swap on the fly is not possible and a reboot is required to enable this, like thers who have suggested you can look into the maxswapchunks kernel parm also.

Rgds

HGN