Performance problem with nnrpd on Tru64

[Francois Baligant]

	Replying to my own posts with a profiler output
	of nnrpd during a classic NNTP session (connect,
	go into busy alt.bin groups, download overview)

	http://news.wanadoo.be:81/nnrpd-prof.txt

	If anyone with some knowledge of the inner workings
	of nnrpd can take a look, that would be great.

	Thanks,
	Francois
-- 

Francois Baligant            _     Wanadoo Belgium NV/SA,
Network Operation Center    ( )       a subsidiary of France Telecom
                            /_\/   Lozenberg 22 - B-1932 Zaventem
francois at be.wanadoo.com    (__/\   tel: +32 2 717 17 17
FB1-6BONE FB3122-RIPE              fax: +32 2 717 17 77

- "if you hold a unix shell to your ear, do you hear the c?"

On Thu, 14 Feb 2002, Francois Baligant wrote:

> 
> 
> 	Hi,
> 
> 	We run inn-STABLE-20020122 on a 2 CPUs Tru64 5.1 box
> 	with 2 gigabytes of memory. We serve around 160-180
> 	concurrent NNTP sessions at peak time. During these
> 	peak times, the load on the box is very high.. average
> 	6.0 up to 10-15.
> 
> 	Most of the CPU is spend in kernel (80% system 20% user)
> 	which seems to underline a performance problem with
> 	the mmap() usage.
> 
> 	I tried with 'articlemmap false' and 'articlemmap true'
> 	and it didn't make a difference.
> 
> 	For information, the pagesize is 8192. I have enabled
> 	manually msync() as requested in the mmap() man pages
> 	(we use AdvFS) and madvice() as well.
> 
> 	Anyone as hint for performance tuning ?
> 
> 	Thanks,
> 	Francois
>