rdisp/scheduler/prio_normal/max_quota is a SAP Parameter attribute which is used to control Maximum quota of dialog work processes used for normal or low prio req information. This is available within R/3 SAP systems depending on the version and release level.
Below is the standard documentation available and a few details of the attributes values .
The kernel scheduler normally distributes incoming dialog requests in
accordance with their priority to all dialog work processes. H
igh-priority requests have priority.
In contrast to this arrangement, this parameter limits the maximum
number of dialog requests with normal or low priority that can be
processed at the same time. Even if there are still free dialog work
processes and there are no requests with high priority, the system will
never use more than the number of dialog work processes specified by the
parmaeter to process requests with normal or low priority.
The system assigns normal priority to all RFC and HTTP dialog requests
that are not directly triggered by user interaction.
The system assigns low priority to all RFC dialog requests that are
triggered by a background request.
The intention behind this parameter is to limit the maximum number of
simultaneously-processed dialog requests with normal or low priority.
This is to ensure that there are always sufficient resources for dialog
requests with high priority.
You cannot choose a value smaller than the effective value for
See SAP Parameter Documentation for full SAP documentation for this profile parameter.