Hi Christoph, My recommendation is to limit the TTL to 12 or 6 hours and find out how many cache entries are created during this time. Increase that by 50% and that's your value. You'll see that it doesn't require that much memory space.
Winfried Am 9. September 2023 09:15:04 MESZ schrieb Christoph via Pdns-users <pdns-users@mailman.powerdns.com>: >Hi, > >if you have 20 or 100 GB of free RAM >what is a good approach to choose the different Recursor's cache sizes? > >Is larger always better or is there a sweet spot >between cache size, cache lookup time, cache management overhead and CPU >usage? How does upstream latency fit into the equation? > >In our case we consider caching and prefetching also an important privacy >property to decouple inbound and outbound queries to some extend. > >We have different kinds of setups: >- fully recursive resolvers >- forwarding resolvers (~12ms upstream latency) > >best regards, >Christoph >_______________________________________________ >Pdns-users mailing list >Pdns-users@mailman.powerdns.com >https://mailman.powerdns.com/mailman/listinfo/pdns-users _______________________________________________ Pdns-users mailing list Pdns-users@mailman.powerdns.com https://mailman.powerdns.com/mailman/listinfo/pdns-users
