returns the total number of session objects in the session store
the count() operation itself is optimized to perform on the server side
and avoid loading to client side.
The State Period is the maximum time in seconds that an in memory session is allows to be stale:
If this period is exceeded, the DB will be checked to see if a more recent version is available.
If the state period is set to a value < 0, then no staleness check will be made.
If the state period is set to 0, then a staleness check is made whenever the active request count goes from 0 to 1.
Scavenge is a process that periodically checks the tracked session
ids of this given instance of the session id manager to see if they
are past the point of expiration.
ScavengeFully is a process that periodically checks the tracked session
ids of this given instance of the session id manager to see if they
are past the point of expiration.
sets how old a session is to be persist past the point it is
considered no longer viable and should be removed
NOTE: set this value to 0 to disable purging of valid sessions
The State Period is the maximum time in seconds that an in memory session is allows to be stale:
If this period is exceeded, the DB will be checked to see if a more recent version is available.
If the state period is set to a value < 0, then no staleness check will be made.
If the state period is set to 0, then a staleness check is made whenever the active request count goes from 0 to 1.