Hello,

I've got a strange problem with memory. When I do a top, it shows me I almost have no RAM available, however when I do a ps -aux the sum of the %Mem used of all processes shows me I shoud only be using about 30%-40% of memory.

Any ideas?

Thanks,

NArcís

Hi,

Try `free`. You'll probably see a lot of your mem is used by the o/s caching disk requests.

Cheers,

Alex
--
Gossamer Threads Inc.

I might be mistaken... but the percentage is not intuitive. Maybe a better way of looking at mem usage is "% of memory application can access"

Here's an example, if you have 10 processes of the same type, say something like httpd, and each of them share the equivalent of 10% of memory, doing a sum of the percentages of mem usage will give you >100%... instead of the real value of only 10% used.

Yeah..that has always been one that comfuses me....cheers for the description Aki You are slowly building up my confidence with you again (j/k)

Andy (mod)
andy@ultranerds.co.uk

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Thanks for replies,

Alex, you were right. I did a free and it showed me that 457972
out of 637828 were cached disk requests.

However, what is cached memory?

Thanks a lot,

Narcís

ok, I found it:

http://www.computeruser.com/...ition.php?lookup=936