Max Cache Objects

[Kevin Darcy]

On 9/21/2011 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.
You can _try_ to raise that limit above 4Gb (see the various 
configuration elements under "Operating System Resource Limits" in the 
ARM), but your OS may still limit you. You'd need to look at your OS 
documentation to see how to raise "soft" and/or "hard" limits.
> 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.
>
Since a large percentage of those top sites use DNS-based load-balancing 
with small TTLs on their records, it's pretty useless.

Of course, you can measure your cache hit ratio to see if it's really 
helping you or not. Real data always beats pure speculation.

                                                                         
                                                                     - Kevin