Hi Winfried,
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.
thanks for your recommendation. I've played a bit with this to see what
max-cache-entries values this procedure would result in.
What input should influence whether this should be done with a
max-cache-ttl of 6, 12 or 24 hours?
The change to max-cache-ttl [1] to N hours would just be temporary,
during the collection of the cache-entries metric, and be set back to 1d
(default) after that or stay at N hours?
Should this procedure be done with refresh-on-ttl-perc=0 for the data
gathering phase?
In any way, the approach results in a significantly larger
max-cache-entries setting than we currently use.
Does the same apply to other caches like
max-packetcache-entries
aggressive-nsec-cache-size and
dnsdist's packetCache maxEntries?
thanks,
Christoph
[1] https://doc.powerdns.com/recursor/settings.html#max-cache-ttl
_______________________________________________
Pdns-users mailing list
Pdns-users@mailman.powerdns.com
https://mailman.powerdns.com/mailman/listinfo/pdns-users
