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Description of problem:

in the warning part, swap cannot actually improve performance,
swap will make more processes stay in "memory", this is achieved by
swapping some processes out of the memory to hard drive, and loading
them back to memory from hard drive, which actually consumes lots of
time.

Reworded to:

Virtual memory allows Linux system to use more memory than there is physical RAM on the system. Underused processes are swapped out which allows active processes to use memory, improving memory utilization. Disabling swap reduces memory utilization as all processes are stored in physical RAM.

http://documentation-stage.bne.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html-single/Virtualization/index.html#id2987579

Does this fix the error?

Thanks for the review.

Chris

(In reply to comment #2)
> Reworded to:
> 
> Virtual memory allows Linux system to use more memory than there is physical
> RAM on the system. Underused processes are swapped out which allows active
> processes to use memory, improving memory utilization. Disabling swap reduces
> memory utilization as all processes are stored in physical RAM.
> 
> http://documentation-stage.bne.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html-single/Virtualization/index.html#id2987579
> 
> Does this fix the error?
> 

yes.

Try this link. The fix is in there:

http://documentation-stage.bne.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Virtualization/ch27s06.html

(In reply to comment #7)
> Try this link. The fix is in there:
> 
> http://documentation-stage.bne.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Virtualization/ch27s06.html    

verified.