Bug 60030 - /proc doesn't scale.
Summary: /proc doesn't scale.
Alias: None
Product: Red Hat Linux
Classification: Retired
Component: kernel   
(Show other bugs)
Version: 7.2
Hardware: i386
OS: Linux
Target Milestone: ---
Assignee: Arjan van de Ven
QA Contact: Brian Brock
Depends On:
TreeView+ depends on / blocked
Reported: 2002-02-19 06:34 UTC by Ed McKenzie
Modified: 2007-04-18 16:40 UTC (History)
0 users

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2003-06-08 01:29:39 UTC
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
top output (2.34 KB, text/plain)
2002-02-19 06:36 UTC, Ed McKenzie
no flags Details

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 1 Ed McKenzie 2002-02-19 06:36:56 UTC
Created attachment 45941 [details]
top output

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.

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