 | | | Linux AS 3 swap question!! | Linux AS 3 swap question!! 2006-02-25 - By Rick Stevens
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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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