[syslog-ng]DNS caching

[Matthew Melvin]

On Tue, 19 Mar 2002 at 10:24am (+0100), Balazs Scheidler wrote:

> On Tue, Mar 19, 2002 at 12:04:34PM +1000, Matthew Melvin wrote:
> > Hello,
> > 
> > 	I'm loath to ask a question right off the blocks but I wasn't able 
> > to find too much in the archives about this... 
> > 
> > I'm using syslog-ng 1.5.14 and am trying to get the 'dns_cache(yes);' option
> > to work for me.

[...]

> 
> can you check this patch, whether it fixes your problem ?
> 
> diff -u -r1.37 cfgfile.c
> --- cfgfile.c	2001/09/03 16:42:23	1.37
> +++ cfgfile.c	2002/03/19 09:23:55

[...]

Thank you... it appears to be working as advertised now.  When running with 
NSCACHE_DEBUG enabled we get lots of messages like...

202.139.234.86... found on 733: bne006m (1 iters, 1016578298/1016581888)
203.147.241.17... found on 760: bne010m (1 iters, 1016578298/1016581888)
202.139.235.196... found on 93: bne002m (1 iters, 1016578298/1016581888)
202.139.235.196... found on 93: bne002m (1 iters, 1016578298/1016581888)
202.139.234.87... found on 734: bne007m (1 iters, 1016578298/1016581888)
202.139.234.87... found on 734: bne007m (1 iters, 1016578298/1016581888)
202.139.234.86... found on 733: bne006m (1 iters, 1016578298/1016581888)
202.139.235.196... found on 93: bne002m (1 iters, 1016578298/1016581888)

.... which looks good.  CPU usage for the syslog process has dropped from 
~80% to ~40% (hazzah!) and the named process that was doing local caching 
has dropped from ~10% to almost nill.  

M.

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