Re: Swap partition

I can appreciate this, however, did you do this prior to installing and using the hard drive? I don't
want to move or add swap partititions if "good" data is already present there. How can I check for this?

Chris...

Chris Miller wrote:

I would just add another swap partition. To give you an idea some of my
bigweb servers have 4 2gig swap partitions. And that is with 2 â 4 gigs
of ram.

What does the box do?

If you are going to do a lot of swapping then you might want to add
pri=0 to the fstab.

Here is what my fstab looks like.

/dev/sda3 swap swap defaults,pri=0 0 0

/dev/sdb2 swap swap defaults,pri=0 0 0

/dev/sda2 swap swap defaults,pri=0 0 0

/dev/sdb3 swap swap defaults,pri=0 0 0

With pri=0 swap will be used on all partition at the same time. When you
do not set pri=0 one swap partition will fill up first then the next and
so on.

But that would be over kill for most people. Only reason I have my swap
setup that way is due to the way apache locks memory when you have 2000+
apache processes running.

On Sat, 2003-12-13 at 22:16, Chris Sparks wrote:

Hi Gregory,

The "easy" thing to do in this case is abandon the miminal swap you have
and just make another (larger) swap partition to be used instead.  The
size of a swap partition is a matter of debate, but generally it sould
be equal to or no more than twice as large as your physical memory.

Since I originally started with 128 MB this makes sense why it suggested 256 MB. I had to increase
the memory to 384 MB because of the boat load of seg faults I was getting.

If you actually have space on the disk around the swap partition that
you can resize into, there is nothing that prevents resizing the
partition and running "mkswap" on the resized space.  There's no real
magic about swap files/partitions.  Of course, you'll have to resize and
mkswap in "single user mode" with swap disabled while you're
manipulating the system.

My swap is at the end of the hard disk so I would be possible to extend into it. Actually I have
the boot first, / second, and the swap last. I just didn't want to clobber anything on the root disk
if I resized into it with the swap. How does one know if it is safe to go into those sectors without
worry?

Also how do I go into single user mode?

I see your concern about having more than one swap file/partition, but
I'd suggest thtat this isn't really something to worry about.  Swap
space shouldn't be a consideration in normaml operation, and using more
than 1 file/partition should not effect efficiency.

I agree, however, I am still intruding into the root partitition anyway.

Chris

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