swap unutilised

[me_spearhead]

Hi,

I have an application on Red Hat Enterprise Linux AS release 3 (Taroon). It uses mysql as back end. Some time back the server response slowed down and the pages took ages to load. The reason was tracked down to low memory. So the memory was upgraded from 2GB to 4GB.
But the problem recurred. I noticed that the swap memory is not being used. What could be the reason ? How can I make the OS to use swap memory ?

free -m
             total       used       free     shared    buffers     cached
Mem:          4017       3999         17          0        192       3614
-/+ buffers/cache:        193       3824
Swap:         4094          0       4094

[khafa]

hi


from the free output we see that your system has enough cached memory so it does
not need to use swap.

[anomie]

How can I make the OS to use swap memory ?

You don't want that. (Unless you'd really like to see performance crawl.)

I think you need to revisit your bottleneck analysis.