Re: [Swarm-Support] Circumventing memory leaks via swap space

[Steve Railsback]

Tim Kohler wrote:
> Hi Steve, this sounds like it might be useful for village. If you decide 
> to not post how you did it, would you please send us the info?

Here is how I created more swap space on a Linux machine that has one 
hard drive dedicated to Linux (as well as I can recreate from my notes).

Be aware of course that you are mucking with your disks and seriously 
bad things could happen...You would be smart to google around a bit on 
increasing swap space for your particular system.

I have a Fedora 9 machine that uses the LVM disk format.

1. Apparently you cannot just move space on your hard disk from the main 
Linux partition to your existing swap partition. Instead, you must 
reduce the size of the main partition to free some space, and then turn 
that freed space into a new, second, swap partition.

2. I installed and used "system-config-lvm", a graphical disk management 
tool available as an "Admin tools" package on Fedora. I reduced the size 
 of the main partition (normally, LogVol00) by selecting that 
partition, clicking on "edit properties", and simply reducing its size 
by 300 extents (about 9.4 gigabytes). It takes a while for 
system-config-lvm to finish this step, presumably because it is checking 
for any files that need to moved.

3. Still in system-config-lvm, I created a new logical volume (in my 
case, LogVol02, which is system file /dev/VolGroup00/LogVol02), setting 
its size to the amount of space freed up in the previous step. Just 
select the Volume Group and click on "Create new logical volume".

4. Now you need to tell the operating system that this new logical 
volume is swap space. You can follow the instructions for setting up the 
swap partition at:
http://www.redhat.com/docs/manuals/linux/RHL-8.0-Manual/custom-guide/s1-swap-adding.html

I did two things:

a) Use the command "mkswap" to turn the new partition into swap space. 
For my system, I did:
 mkswap /dev/VolGroup00/LogVol02

b) Edit the file /etc/fstab to add a line telling the system about the 
new partition when you boot. For me, it was:
  /dev/VolGroup00/LogVol02 swap swap defaults 0 0



--
Steve Railsback
Lang, Railsback & Associates
Arcata, California
www.LangRailsback.com