Re: swp - Re: ext3 journal on software raid (was Re: PROBLEM: Kernel 2.6.10 crashing repeatedly and hard)

On Wed, 5 Jan 2005, Mike Hardy wrote:

There are those that think if they size the machine correctly, they 
shouldn't need swap, and they're right.

bingo
 

quoted

I had 8 Meg of swap space.  So 12 meg total available virtual memory.
One day I added 16 Meg of RAM.  So now I had 20 Meg of RAM.  I deleted my
swap space.  Everyone told me I needed 20-40 Meg of swap space now!  Swap
space should be 2 time RAM size.  How crazy, my memory requirements did not
change, just the amount of memory.  I used that system for a year or so like
that.  Go figure!

the silly rule of 2x size of RAM == swap space came from the old days
when memory was 10x the costs of disks or some silly cost performance
that it made sense when grandpa was floating around

by todays ram and disk pricing ... and cpu speeds ...2x memory sorta
goes out the door

c ya
alvin