On Wed, Feb 04, 2004 at 02:29:44PM +0000, Frank Kardel wrote:
> Hi *,
> 
> i have had similar observations (see eMail to current-users with subject 
>  "ps crawling...").
> 
> My system is also a larger main memory system (1GB). I observed some
> unsusual things last night comparable to Patrik's findings.
> Here is a list:
> - I found pagedaemon running wild for some time so the top
>   showed 98% CPU usage.
> - vmstat bufs is high cpu and cannot keep up with the usual display interval
> - ps take about 100ms per process (it is faster shortly after re-boot)
> 
> - ps has system times in the > 98% range (it takes about 15s system time).
> 
> Could this be related to the other thread in -current lately about
> pmap 0 showing many memory segments/fragmentation ?

Possibly:

% uname -sr && uptime && pmap 0 | wc -l
NetBSD 1.6ZI
 3:27PM  up 22:16, 6 users, load averages: 1.33, 1.62, 1.63
date
   47165
% Wed Feb  4 16:34:17 GMT 2004

As in it took 1:07 to do the pmap.. At least that gives 2 options:
- try compiling with NEW_BUFQ_STRATEGY
- try code from before 2004/01/29 12:06:02; reverting workaround for
  PR/24039

Cheers,

Patrick