One thing I'd like to mention, which may be a moot point, is that the
days of second-level granularity should be put behind us.  Especially
"in the cloud."

What I mean is that logging the date and time of queries, for example,
should not be at second-level granularity. Not just the elapsed
execution time -- but the time the event itself occurred.  It should
be in microseconds.

The processlist should not show seconds, it should show microseconds.

Replication lag shouldn't be seconds_behind_master, it should be
microseconds.  (I know, replication is being ripped out...)

Anywhere there's a timestamp is probably a candidate for greater
precision.  I don't know if the question about a native timestamp type
with microsecond precision was ever resolved -- but I'm sure that is a
prerequisite :)

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