How to disable a Ram Swap permanently

[Lawrence Tsang]

Hi All,

     Thanks for the answers.

     Following Tony's link, I have now updated my initramfs and have removed
the compcache (Ram Swap) permanently. [I might have installed some packages
(e.g casper, etc) that might have changed my initramfs while not noticing
me.]

     However, using "swapon -s", it still tells me that my Swap Partition
has a priority of -1.

     Does this negative priority hurt? I could see that while my 2G on-board
ram has a 1.6G utilization, my 2G Swap Partition only takes up about 10M.
Does this negative priority let my system use less swap space?

     Any suggestion.

Regards
Lawrence

On Sun, Mar 7, 2010 at 7:15 PM, Tony Arnold <tony.arnold at manchester.ac.uk>wrote:

> Lawrence,
>
> Maybe this will help:
>
>
> http://odzangba.wordpress.com/2009/10/12/how-to-disable-compcache-and-fix-swap-errors-in-ubuntu-9-04/
>
> Regards,
> Tony.
>
> Lawrence Tsang wrote:
> > Hi Steve and All,
> >
> >      In fact, I have added a line in /etc/fstab to install my Swap
> > Partition. The listing of my fstab is :
> >
> > # /etc/fstab: static file system information.
> > proc            /proc           proc    defaults        0       0
> > UUID=5a715fd8-c9d0-4523-a213-eff956d2d798     /        ext3
> > errors=remount-ro     0     1
> > UUID=a5662716-31ad-4c28-abab-f0e323d5ae2c     none     swap     sw
> > 0     0
> > /dev/scd0     /media/cdrom0     udf,iso9660
> > user,noauto,exec,utf8     0     0
> >
> >      These settings in fstab install my Swap Partition with -1 priority
> > and would not let my Ram Swap go away.
> >
> >      Any concrete procedure to disable the Ram Swap?
> >
> > Regards
> > Lawrence
> >
> >
> > On Sun, Mar 7, 2010 at 6:46 PM, Steve <yorvik.ubunto at googlemail.com
> > <mailto:yorvik.ubunto at googlemail.com>> wrote:
> >
> >     On Sun, 07 Mar 2010 10:36:01 -0000, Lawrence Tsang
> >     <tkwinfo at gmail.com <mailto:tkwinfo at gmail.com>>
> >     wrote:
> >
> >     > Hi All,
> >     >
> >     >      Originally I am using Ubuntu Karmic with no swap partition /
> swap
> >     > file.
> >     > The Ubuntu system automatically initializes a 500M Ram Swap for me.
> >     > Recently
> >     > I manage to create a 2G Swap Partition and install the Swap
> >     Partition by
> >     > adding a line in /etc/fstab.
> >     >
> >     >      However, after booting my system, I find that there are in
> fact 2
> >     > swaps
> >     > on my system --- the Ram Swap and the Swap Partition. The listing
> >     after
> >     > running the "swapon -s" command is :
> >     >
> >     > root at tkwinfo-desktop:/home/tkwinfo# swapon -s
> >     > Filename                Type        Size    Used    Priority
> >     > /dev/ramzswap0                          partition    515288    0
> >      100
> >     > /dev/sdc3                               partition    2216960    0
> >        -1
> >     >
> >     >      The Swap Partition (/dev/sdc3) has only a priority of -1
> >     while the
> >     > Ram
> >     > Swap (/dev/ramzswap0) is still installed.
> >     >
> >     >      I want to know that :
> >     > (1) Is the Ram Swap still necessary? If not, how to remove it.
> >     > (2) How to increase the priority of the Swap Partition.
> >     >
> >     >      Any idea? Thanks in advance.
> >     >
> >     > Regards
> >     > Lawrence
> >     >
> >     All you need to do is edit /etc/fstab
> >
> >     --
> >     Steve
> >
> >     Yorvyk
> >
> >     --
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> >
>
> --
> Tony Arnold,                        Tel: +44 (0) 161 275 6093
> Head of IT Security,                Fax: +44 (0) 870 136 1004
> University of Manchester,           Mob: +44 (0) 773 330 0039
> Manchester M13 9PL.                 Email: tony.arnold at manchester.ac.uk
>
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