Tune Redis COUNT modifier for HSCAN
This change set tunes the COUNT modifier for the HSCAN Redis command
that is in the Expiring Hash types.
We have Redis hashes that have thousands of entries which with the
default COUNT of 10 would require a significant amount of HSCAN
commands to be issued. This is a problem on may even saturate the CPU on
the Redis servers, as we've experienced in
#415.
The "downside" of larger COUNT is that the Redis server will be blocked
for the amount of time it requires to collect all the hash entries.
However, a COUNT of 1000 should be okay,
see
!1393 (merged) (comment 1831547449).
Refs #415
Edited by Timo Furrer