|Summary:||/proc doesn't scale.|
|Product:||[Retired] Red Hat Linux||Reporter:||Ed McKenzie <eem12>|
|Component:||kernel||Assignee:||Arjan van de Ven <arjanv>|
|Status:||CLOSED WONTFIX||QA Contact:||Brian Brock <bbrock>|
|Fixed In Version:||Doc Type:||Bug Fix|
|Doc Text:||Story Points:||---|
|Last Closed:||2003-06-08 01:29:39 UTC||Type:||---|
|oVirt Team:||---||RHEL 7.3 requirements from Atomic Host:|
Description Ed McKenzie 2002-02-19 06:34:07 UTC
Under high load, top/ps spend excessive time in the kernel, and cease to function in a useful way. On UP, they simply don't work at all beyond a certain point; on SMP, you can see why. See attachment.
Comment 2 Arjan van de Ven 2002-02-19 08:56:51 UTC
Known issue; top asks the kernel to calculate how much memory there is shared between processes; that's a rather expensive calculation if you have lots of processes with shared components...
Comment 3 Ed McKenzie 2002-02-19 13:27:36 UTC
Might the rmap patches speed things up at all?
Comment 4 Arjan van de Ven 2002-02-19 13:44:10 UTC
Doesn't help too much unfortionatly. top still asks it per process... sort of the same amount of work that way.