Max Cache Objects

[TMK]

On Sat, Sep 24, 2011 at 9:14 PM, TMK <engtmk at gmail.com> wrote:
>
>> Date: Fri, 23 Sep 2011 11:24:17 -0400
>> From: John Wobus <jw354 at cornell.edu>
>> Subject: Re: Max Cache Objects
>> To: bind-users <bind-users at lists.isc.org>
>> Message-ID: <36280284-5B30-4BC4-8D7C-61CB2C1CC13B at cornell.edu>
>> Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
>>
>> Is it possible that your DNS performance issue isn't a
>> cache issue? For example, does your system need to
>> invoke bind with -4?
>>
>> John
>>
>
> We have tried so. There is no imorovment.
>
>> On Sep 21, 2011, at 5:00 PM, TMK wrote:
>>
>> > I have couple of questions.
>> >
>> > bind cache memory limit is 4GB. can I increase it. or this is hard-
>> > coded limit.
>> >
>> > i'm running the x64 bit version.
>> >
>> > also to increase the cache hit ratio I have created script to query my
>> > dns for the top 1 million sites. would this give any performance
>> > advantages or is it useless.
>> >
>> > thx in advance
>
> On Sep 24, 2011 2:01 PM, <bind-users-request at lists.isc.org> wrote:
>

I can see two limits configured int.h.

first one is ISC_UINT32_MAX which is the effective one and forcing the
cache to be max of 4 GB

and the other one is ISC_UINT64_MAX which isn't used.


would it cause any issue if I just replace the two values in the
server.c file. so it won't give too large value whenver the
max-cache-size > 4 GB