What does work is "time" instead of
"time_hires". Since I have no idea
what values are available (I guess the table names?) and time only has a
1 sec resolution, what is a correct version of time_hires?
To answer my own question:
with
modparam("acc", "time_mode", 2)
and
modparam("db_redis", "keys",
"acc=entry:callid,time_attr&cid:callid")
you'd get a millisec resolution timer in the key for redis