BIND 9.2.3, large zone xfer and 100% CPU Utilization

[Alex Rainchik]

phn at icke-reklam.ipsec.nu wrote in message news:<c69e5r$307i$1 at sf1.isc.org>...
> Alex Rainchik <rainchik at mail.ru> wrote:
> > Hello,
>  
> > We are using BIND 9.2.3 on Solaris8, transfering ~45Mb zone from mail-abuse.com
> > every three hours, as they don't support IXFR feature. The issue we have is that
> > at the end of the transfer "named" goes berserk and CPU utlilization goes trough
> > the roof, up to 100% for about 5-10 minutes. 
>  
> > During those 5-10 minutes "named" does not respond to any queries, "rdnc status"
> > does not work either. It's the only zone xfer running at that time....
>  
> > Just wondering if it's a bug or a feature? 
> 
> Garbage collection (of the old zone) could take some time. How 
> slow is your sun ?
> 
> > Thank you!
> 
> I manage a spews-zone ( about 35M in size) using IXFR between bind-9
> and it seems to go smooth on a p-1200 slave. ( i don't see any
> lockups during or after loading)

I think that the main issue is no IXFR support for RBL/RBL+ from
mail-abuse.com

You are probably right about garbage collecting, it looks like bind is
using 64-byte chunks to store zone data in memory...