how much swapping before you should add ram?

P

phospher

i've questioned this for some time... how much swapping is acceptable before you should add more ram? i currently have a FreeBSD 7.2 machine with 256mb of ram and swapinfo is showing 20%. are there any thumb rules that you use as to when more ram is needed?

thanks gents.
 
When you look `top` - if you see "20K in", "10K out" or something constantly.. I think no matter how much pages swapped out - its important how intensively swap is used.
 
That's right. Swapping in itself is not bad (dropping idle process memory in swap saves RAM), constant active swapping is bad.
 
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