Resolver issue - drop in qps and memory leak

[Cathy Almond]

Hi Dennis,

There are some fixes for cache management issues on recursive servers
that have been released recently.  This sounds like it might have been
one of those problems.

If you want to stay on 9.6, then I'd recommend 9.6-ESV-R4 to you
Otherwise you might like to take a look at 9.7.3.

Cathy

On 08/04/11 07:41, Dennis Perisa wrote:
> Hi all,
> 
> We are running a couple of resolvers using BIND 9.6.2-p2 on FreeBSD 7.1 and
> are peaking at 10,000 queries per second (qps).
> 
> Recently, the qps on one resolver dropped dramatically to 3000 during the
> peak period.  The secondary picked up the additional queries and we had a
> few complaints about response times, but not much more than that.
> Restarting named seems to have resolved it and we are back at 10,000
> qps during peak - for now.
> 
> We also observed the following during the problem period:
> - memory usage increased steadily from 10% to 15% (typically it remains
> steady at 10%)
> - many events in the general log like this: "general: info: sockmgr
> 0x800d46000: maximum number of FD events (64) received"
> 
> Appreciate any help to determine the root cause.
> 
> Regards,
> Dennis
> 
> 
> 
> 
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