Quation about HZ kernel option

[Oliver Fromme]

Artem Kuchin wrote:
 > Oliver Fromme wrote:
 > > Artem Kuchin wrote:
 > > > What value of HZ option would you recommend
 > > > for a hosting (web) server with a lot of processes
 > > > (about 900) and polling off (as decided from previous
 > > > discussion polling is useless in
 > > > this situation).
 > > 
 > > In that case, I would recommend not to override the
 > > default at all (which is 1000).
 > 
 > Umm.. default is 100 (one hundred), i think.

No, the default is 1000 for quite a few years.  Well,
except on the alpha platform, but I guess you're on
either i386 or amd64, not alpha.

Quote from src/sys/kern/subr_param.c:

#ifndef HZ
#  if defined(__amd64__) || defined(__i386__) || defined(__ia64__) || defined(__sparc64__)
#    define     HZ 1000
#  else
#    define     HZ 100
#  endif
#endif

Best regards
   Oliver

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