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top command

Super Advisor

top command

please explain fields in top command

top command output

Memory: 61304K (34388K) real, 96724K (60688K) virtual, 1474088K free Page# 1/3

James R. Ferguson
Acclaimed Contributor

Re: top command


From the manpages: the "...virtual and real memory used by user processes (with the amount of memory considered "active" in parentheses) and the amount of free memory."


Super Advisor

Re: top command

hi ,

server have

real memory 4GB
virtual memory 4GB

this is not reflect in top command memory output.please explain
Don Morris_1
Honored Contributor

Re: top command

Users processes aren't using the full server (and are unlikely to ever do so - the kernel does need some resources).

That's why the man page says the part about "used by user processes" not "used across the system" and why top is not an indication of system consumption as a whole (though you can infer some things from the "free" count).
Kranti Mahmud
Honored Contributor

Re: top command

Hi rajesh73,

Check the below link:


Dont look BACK as U will miss something INFRONT!