Re: performance loss with inn 2.5.x (tradspool) ?
Matija Nalis <mnalis-ml <at> voyager.hr>
2012-04-07 01:31:46 GMT
On Mon, Feb 13, 2012 at 01:41:25PM +0100, Julien ÉLIE wrote:
> Hi Matija,
> >I've recently upgraded (xref master) news machine from Debian
> >Lenny with INN 2.4.6-snapshot-20090119 to Debian Squeeze with
> >INN 2.5.2-2~squeeze1
> >I've done it before with xrefslave INN server (tradspool with
> >tradindex) on similar hardware, and it didn't have any performance
> >However, now I've upgraded xref master server (tradspool, no readers
> >and no overview indexes, with about 45 realtime peers) and I'm seeing
> >severe performance degradation (loadavg went from 2 to 6!), which
> >started to create problems (server does not responded to nagios
> >connection probes to port 119, etc)
> I do not know what could generate such a difference.
For the record: it seems to be the kernel, as going back to the one from
lenny restored most of the performance back.
But as that server was old anyway, and running old kernel was not a
long-term option, it got upgraded to new shiny server with 4 disks
in RAID10 and working BBU RAID controller which made it fly!
> As far as I understand, the problem is related with "peering"-like
> INN 2.5.x has a new parser for NNTP commands but I doubt it would
> cause a very huger load for innd.