Add swap space

[Achilles_2]

Instead using SAM, what is the step to add swap space? I am the beginner, I just know swapon command but no more idea how to use correctly

thanks for your advise

[RAC_1]

Create lvol (better if you create on differnt disk than primary swap disk)
lvcreate -L "xxM" -C y -r n /dev/vgxx
swapon -p "same_priority_as_primary_swap" /dev/vgxx/lvolx

(Same priority gives advantage of round robin swapping and is helpful)

Update /etc/fstab as follows.

/dev/vgxx/lvolx . swap pri=x 0 0

Depending upon your maxswapchunks settings, you may need to tune it to reflect additional space configured for swap.

[Muthukumar_5]

Create lv with lvcreate as,

#lvcreate -L 16M -n myswap /dev/vg01 (swap size is 16MB)

Add swap as,

#swapon /dev/vg01/myswap

hth.

[Arunvijai_4]

A great document,
http://docs.hp.com/en/B2355-90672/ch06s03.html
[HP-UX System Administration Tasks > Chapter 6. Managing Swap Space and Dump Areas
Designing Your Swap Space Allocation]

http://docs.hp.com/en/B2355-90672/ch06s04.html?btnNext=next%A0%BB
[Adding, Modifying, or Removing Device Swap]

# man swapon will also help

-Arun

[Alex Lavrov.]

A little addtion.

User "swapon -f".

-f - very important, forces swapon to use the whole logical volume, because if there once a filesystem and lvol, it will recognize it and use the space that left after the FS.

I had this thing once and eventually had to reboot the machine to get rid of 12MB swap. Well, learned my lesson.

Alex.

[Stuart Abramson]

Swap must be contiguous. lvcreate must have parameter "-C y". RAC had it right. Muthukumar forgot it.