Secondary swap

[Feljav]

Can I eliminate a secondary swap logical volume?
Can I reuse this space?

[James R. Ferguson · Accepted solution]

Hi:

Yes. Remove the '/etc/fstab' entry for the secondary device swap (primary swap is never listed in '/etc/fstab') and reboot.

After rebooting, you can 'lvremove' the logical volume that hosts the secondary swap.

Regards!

...JRF...

[Feljav]

Soryy!!I forgot to say that the system is HP-UX
Beside that, What size should the swap be? Twice the physucal memory or 1.5 the physucal memory?

[James R. Ferguson]

Hi (again):

> What size should the swap be? Twice the physical memory or 1.5 the physical memory?

Everything depends upon *your* environment and its needs.

As long as you have enough swap space for process swap reservatation, and as long as you don't actually swap, you have enough.

If you set the kernel 'swapmem_on' to one (1), then 75% of your physical memory will be counted by the kernel as available swap space. This allows processes to be 'fork'ed and satisfy their swap space reservation requirements without actually allocating swap disk for that purpose. The idea of a "reservation" is that a process *might* need to be paged-out and thus "space" needs to be reserved.

Insufficient swap space for process swap reservation is seen when you encounter ENOMEM (errno=12) errors.

Regards!

...JRF...

[Feljav]

Thank you very much for your help!!!!