2
votes
1answer
353 views

ps and top give different CPU usage

I've seen a few posts similar to this, most notably here, but wasn't quite satisfied with the answers. I'm comparing top and ps results on a specific process and see huge discrepancies in CPU usage. ...
0
votes
0answers
161 views

PStree with memory use?

Is there any utility out there for linux that will give me a PStree with memory use per process? I guess it's possible in theory to grab a pstree with pids, then comb ps itself for the memory use for ...
0
votes
3answers
492 views

Linux Memory Displays Half Used But No Processes Seem to Be Using It

I am running a Java script on a Fedora Core Release 6 server (Linux 2.6.19-1.2911.6.5.fc6xen x86_64) and am concerned about a lack of memory. The box has 2 GB of memory in total. Running "free -tm" ...
3
votes
2answers
4k views

Is it possible to 'hide' a process from the listing of `ps` or `top` on Linux

First, I presume that if this is possible it would need to be done as root (or as a user who shares root's UID of 0). How can a process be launched so that it does not show up in a ps aux or ps ef or ...