shell-things/etc/unbound/unbound.conf.d/cache.conf

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# Increasing caching
# This has potential to increase memory usage to 110m under heavy usage, but
# I find that unlikely as almost everything is using so short TTLs
# See also MEMORY CONTROL EXAMPLE in man unbound.conf
server:
# bytes in message cache, defaults to 4m
msg-cache-size: 50m
# bytes in rrset cache, defaults to 4m
rrset-cache-size: 50m
# nxdomain cache, default 1m
neg-cache-size: 10m
# Cache results for 5 minutes even if they had a shorter TTL. Cloudflare
# zone export used to have 1 second, and I have also been seeing 1
# minute in the wild, I think this shouldn't break anything, but bigger
# might.
cache-min-ttl: 300