I have a redhat 9 server.
1G memory,and 2 CPUs.
I just use it for http and ftp services. Of course ,mysql is installed.

But after I restarted the server,I found the memory increase very fast.
When I use "top" command,it get the following result:
81 processes: 80 sleeping, 1 running, 0 zombie, 0 stopped
CPU0 states: 0.0% user 0.4% system 0.0% nice 0.0% iowait 99.1% idle
CPU1 states: 0.0% user 0.0% system 0.0% nice 0.0% iowait 100.0% idle
CPU2 states: 0.1% user 0.2% system 0.0% nice 0.0% iowait 99.2% idle
CPU3 states: 0.1% user 0.2% system 0.0% nice 0.0% iowait 99.2% idle
Mem: 1030284k av, 1017484k used, 12800k free, 0k shrd, 27652k buff
370008k actv, 1324k in_d, 582156k in_c
Swap: 2040244k av, 3372k used, 2036872k free 813300k cached

Is it possible that linux use say man memory?
Or there is virus ?
Thanks

Try the command 'ps aux'. It will tell you how much memory each process is using. Look for the one that's using a lot and there you have it.

A Linux server will *usually* use as much memory as it can before utilizing it's swap partitions. As far as I know, this is normal...

Notice how little swap is being used?

Brought up and asked all the time, its prefectly normal. Linux is not Windows.. why not use your memory in place rather than have it sit and doing nothing..