 | | | Linux AS 3 swap question!! | Linux AS 3 swap question!! 2006-02-26 - By mac
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Appreciate your response ..Thanks ..i juts have a couple of queries
1)i have a swap partion of 16 GB ...how can i go about decreasing the size
of this partition ie the size of swap
2)Can both the swap file and partition coexist ??
3)WHich is a better approcah ..partition or file and which exists after
every reboot
Really appreciate your help here
Thanks
On 2/26/06, Rick Stevens <rstevens@(protected)> wrote:
>
> On Sat, 2006-02-25 at 23:09 +0530, mac wrote:
> > Hi,
> > We have a Linux EL AS 3 running on a poweredge server with 8 GB
> > ram ...we would like to know how to change the swap space on a linux
> > AS 3 system dynamically
> >
> > and would AS3 support a swap size of 16 GB
> >
> > any pointers appreciated
>
> You can have up to 16 swap sections but each is limited to 2GB each,
> giving a total of 32GB of swap. You can't change the swap size
> dynamically, since the swap is on a fixed-size partition or file. You
> can enable and disable various swap files or partitions using the
> swapon(8) or swapoff(8) commands.
>
> Swap has to be either a separate partition OR a zero-filled file. You
> probably know how to make a swap partition. To create a swap _file_:
>
> 1. Find a partition that has enough free space for the swap you want.
>
> 2. As root, do:
>
> # dd if=/dev/zero of=/path/to/swap/file count=size
>
> For example, to create a 2GB swap file called "/var/swapfile":
>
> # dd if=/dev/zero of=/var/swapfile count=2G
>
> 3. Convert the file to a swap file:
>
> # mkswap /var/swapfile
>
> 3. Activate via:
>
> # swapon /var/swapfile
>
> 4. Edit your /etc/fstab file and add a line for this swap file so it'll
> activate on the next boot:
>
> /var/swapfile swap swap defaults 0 0
>
> Voila!
>
> -- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- --
> - Rick Stevens, Senior Systems Engineer rstevens@(protected) -
> - VitalStream, Inc. http://www.vitalstream.com -
> - -
> - God is real...........unless declared integer or long -
> -- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- --
>
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Appreciate your response ..Thanks ..i juts have a couple of queries<br><br>1)i
have a swap partion of 16 GB ...how can i go about decreasing the size of
this partition ie the size of swap<br><br>2)Can both the swap file and
partition coexist ??
<br><br>3)WHich is a better approcah ..partition or file and which exists after
every reboot<br><br>Really appreciate your help here<br><br>Thanks<br><br><div>
<span class="gmail_quote">On 2/26/06, <b class="gmail_sendername">
Rick Stevens</b> <<a href="mailto:rstevens@(protected)">rstevens
@(protected)</a>> wrote:</span><blockquote class="gmail_quote" style=
"border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding
-left: 1ex;">
On Sat, 2006-02-25 at 23:09 +0530, mac wrote:<br>> Hi,<br>> We have a
Linux EL AS 3 running on a poweredge server with 8 GB<br>> ram ...we would
like to know how to change the swap space on a linux<br>> AS 3 system
dynamically
<br>><br>> and would AS3 support a swap size of 16 GB<br>>
<br>> any pointers appreciated<br><br>You can have up to 16 swap sections but
each is limited to 2GB each,<br>giving a total of 32GB of swap. You
can't change the swap size
<br>dynamically, since the swap is on a fixed-size partition or file.
You<br>can enable and disable various swap files or partitions using the
<br>swapon(8) or swapoff(8) commands.<br><br>Swap has to be either a separate
partition OR a zero-filled file. You
<br>probably know how to make a swap partition. To create a swap
_file_:<br><br>1. Find a partition that has enough free space for the swap you
want.<br><br>2. As root, do:<br><br>
# dd if=/dev/zero of=/path/to/swap/file count=size
<br><br>For example, to create a 2GB swap file called "/var/swapfile"
:<br><br> # dd if=/dev/zero of=
/var/swapfile count=2G<br><br>3. Convert the file to a swap file:<br><br>
# mkswap /var/swapfile<br>
<br>3. Activate via:<br><br> #
swapon /var/swapfile<br><br>4. Edit your /etc/fstab file and add a line for
this swap file so it'll<br>activate on the next boot:<br><br>
/var/swapfile swap
swap defaults
0 0
<br><br>Voila!<br><br>-- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ----
-- ---- -----<br>- Rick Stevens, Senior Systems Engineer
<a href="mailto:rstevens@(protected)">rstevens@(protected)</a> -<br>-
VitalStream, Inc.
<a href="http://www.vitalstream.com">http://www.vitalstream.com</a> -<br>- 
;
-<br>- God is real...
........unless declared integer or long -<br
>
-- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- --<br><br>_
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