dns-buffersize verifiedWritten by the Hub
UDP buffer for DNS
in the configuration this is a line
dns-buffersize: 1MBSize of the socket buffer used for DNS traffic.
Values
- Values
size with unit- Default
1MB · taken from the build- applying
restart required- where it can be set
in the config file · with a startup flag · as an environment variable
In detail
A megabyte, where the documentation says "system default". Under a burst of lookups a small buffer drops responses, and a dropped response is indistinguishable from a slow one — it costs an attempt, and with only two attempts available that matters.