how much ram is needed?????
Q4997C at motorola.com
Wed Oct 3 07:00:57 UTC 2007
How will calculate the size on RAM required for a particular DNS Server
From: bind-users-bounce at isc.org [mailto:bind-users-bounce at isc.org] On Behalf Of jm
Sent: Wednesday, October 03, 2007 6:44 AM
Cc: bind-users at isc.org
Subject: Re: how much ram is needed?????
On 10/03/2007 10:48 AM, Kevin Darcy wrote:
> Iñaki Martínez Díez wrote:
>> I have a bind 9.4.1 server in Debian Etch with more than 24.000 zones.
> How many records?
>> The server has 2 Gb of RAM but i think is not enough.
> What makes you think that? On my Solaris 9 boxes, with 4Gb, hosting
> about 5100 zones containing about 52,000 records, but which are also
> performing recursive Internet DNS resolution (in a separate view of
> course) for web/mail connectivity, etc., the "sar -r" command tells me
> my freemem is stable and I'm basically not swapping at all. I'm not
> familiar with the tools available on Debian, or how one would go about
> interpreting their results, but there _must_ be a way to tell whether
> you're in trouble memory-wise. Perhaps you should ask on a Debian list.
"free -m" on linux. Or alternatively "cat /proc/meminfo"
>> The zones are growing day by day.
>> How much ram is needed for about 24.000 zones????
>> Is there any formula to calculate this????
> In the days of BIND 8 I think some folks used a rule-of-thumb of 100
> bytes/record. Don't know if that's valid any more for BIND 9.
> For us, it works out better economically to just buy "comfortably large"
> boxes at every lease-refresh cycle, allowing for some growth. Trying to
> micromanage our hardware resources, and to do incremental upgrades in
> any reasonable timeframe (given our byzantine procurement processes)
> just doesn't make sense for us. Your mileage may vary.
> - Kevin
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