how do i manage swap ?

Forum: HD Install
Topic: how do i manage swap ?
started by: kamaradski

Posted by kamaradski on Dec. 10 2006,17:00

hello,

i think maybe the swap is not mounted correctly and might not be in use.
if i give the " mount -l" command, i don't see my swap mounted (hda2)

so i should set a rule in my /etc/fstab ?
and what should it say ? :

Code Sample

/dev/hda2 /mnt/hda2 swap defaults 0 0

or should i set it elsewhere ?

thz in advance

Posted by roberts on Dec. 10 2006,17:10

swap is not mounted as normal drive partitions.

To see if a swap partition was created use the command

sudo fdisk -l

To see if swap is setup use the command

free

You should not have to setup an entry in fstab, as normally DSL/Knoppix will regenerate it and auto detects swap partitions.

To manage swap use the commands swapon swapoff

Posted by kamaradski on Dec. 10 2006,17:45

ok thanks a bunch !!

fdisk -l says " swap partition is 4,8GB"
free says " swap available = o"
mkswap /dev/hda2 says "ok i make a swap of 2GB"
swapon /dev/hda2 says "ok done"

only 2 questions left:

- will it always activate swap on boot now ? or do i need to edit the swapon in bootscript?
- why doesn't it fill the entire partition with swap. it uses only half of it.

i will install a web-cache server, i it might need loads of swap and mem.

greets

Posted by roberts on Dec. 10 2006,17:55

The 2gb limit should be lifted in the next release v3.2
A swap partition should be auto detected upon next boot.

Posted by kamaradski on Dec. 10 2006,19:14

thankz roberts, for your help on this.

apriciated much !
kamaradski

Posted by kamaradski on Dec. 11 2006,11:26

i hate to say this, but it didn't activate my swap on reboot.

makeing a edit in fstab doesn't work eighter, i have to do both the mkswap and swapon on reboot.

so what's next ?

greets
kamaradski

Posted by roberts on Dec. 11 2006,16:50

And fdisk -l displays the partition as what type?
Should be type 82 "Linux Swap"

Posted by kamaradski on Dec. 11 2006,19:47

it is indeed 82

after running the mkswap and swapon it works like a sweet.
it only doesn't hold it after reboot.

Code Sample

/dev/hda1 * 1 608 83 linux
/dev/hda2 608 1216 82 linux-swap

greets
kamaradski

Posted by roberts on Dec. 11 2006,20:46

I cannot reproduce your condition.
Works fine on several test machines.

You can always add those two lines to
/opt/bootlocal.sh

Posted by kamaradski on Dec. 11 2006,23:05

ok thz again.

This install of DSL i'm currently running is still a testversion for me to familiarize (pff hard word) myself with DSL and squid.

so i will reinstall it for final, and will try to reproduce it myself.
if i succeed i let you know how i did it. there might be a way to prevent it for other users (if needed)

i'll play with squid now for a couple of day's and forget about the swap till i know how to flawlessly install this combo.

i'll keep you updated
kamaradski