Very Computer

by **Eric Chi** » Sat, 30 May 1998 04:00:00

Greetings,

I am using SCO OpenServer 5.0.4 on a compaq prolian 4500 server. The
initial swap space setup is too small. I want to increase the swap
space.

I first create a directory say '/hotswap' and inside the hotswap
directory, I created a empty file called 'swapfile2'. I then make the
file swapfile2 act as a swap space
using :
swap -a /hotswap/swapfile2 65536

When I used 'swap -l' to list the current swap space, it appears to have
added to the system. But when I check the system disk space, it appear
to be the same as before the swap file is added to the system.

path swaplo block free
block
=========================================
/dev/swap 1,41 0 196668 186790
/hotswap/swapfile2 76,1 0 65536 65536

Can someone tell if I done it correctly? If not, how should I do it ?

Thank in advance

Eric Chin

by **Mike Hopkirk (ho** » Sun, 31 May 1998 04:00:00

>I am using SCO OpenServer 5.0.4 on a compaq prolian 4500 server. The
>initial swap space setup is too small. I want to increase the swap
>space.

>I first create a directory say '/hotswap' and inside the hotswap
>directory, I created a empty file called 'swapfile2'. I then make the
>file swapfile2 act as a swap space
>using :
> swap -a /hotswap/swapfile2 65536

>When I used 'swap -l' to list the current swap space, it appears to have
>added to the system. But when I check the system disk space, it appear
>to be the same as before the swap file is added to the system.

>path swaplo block free
>block
>=========================================
>/dev/swap 1,41 0 196668 186790
>/hotswap/swapfile2 76,1 0 65536 65536

This is telling you its not swapped anything into the swapfile yet
( free == blocks)

If you look at the actual file length in the fs is probably still
0 length...

It'll grow as it needs to use the swap space on that file...

I presume you could preallocate that space in that file by
using dd to make a file of the max swap size specified (once) before you
use swap -a to add it ..
--
- hops

Everything disclaimed (including disclaimer)

Mike Hopkirk ( hops ) | Whenever possible steal code.
SCO Inc | Tom Duff. Bell Labs

by **Bela Lubki** » Sun, 31 May 1998 04:00:00

> I am using SCO OpenServer 5.0.4 on a compaq prolian 4500 server. The
> initial swap space setup is too small. I want to increase the swap
> space.

> I first create a directory say '/hotswap' and inside the hotswap
> directory, I created a empty file called 'swapfile2'. I then make the
> file swapfile2 act as a swap space
> using :
> swap -a /hotswap/swapfile2 65536

> When I used 'swap -l' to list the current swap space, it appears to have
> added to the system. But when I check the system disk space, it appear
> to be the same as before the swap file is added to the system.

> path swaplo block free
> block
> =========================================
> /dev/swap 1,41 0 196668 186790
> /hotswap/swapfile2 76,1 0 65536 65536

> Can someone tell if I done it correctly? If not, how should I do it ?

Well, it's up to you. You can fully allocate the swapfile when you
create it, in which case that disk space is consumed. Or you can leave
it empty, and then if the swap space is ever used, disk blocks will be
allocated. To fully pre-allocate the space, just copy something into
the file, e.g.:

dd if=/dev/zero bs=1024k count=32 of=/hotswap/swapfile2

(BTW, swap(ADM) uses 512-byte blocks, so your 65536 blocks == 32MB.)

- Show quoted text -

Quote:>Bela<

Very Computer

Adding swap space using 'swap -a' command ?

Adding swap space using 'swap -a' command ?

Adding swap space using 'swap -a' command ?

Adding swap space using 'swap -a' command ?