SAP Parameter zcsa/request_unit - Counter for displacement and reorganisation


Parameter description
This parameter triggers the frequency of an eviction and reorganizationrun of the table buffer. Following each "zcsa/request_unit" read accessto the buffer, the system checks whether an eviction or reorganizationrun is to take place. If this value is increased, there is a risk thatthe eviction is performed too infrequently and this would mean thatbuffered tables cannot be stored in the buffer. The result can be a lossin performance because accesses to these tables then go to the database.On the other hand, the value of this parameter must not be set too lowbecause this could result in the notification mechanism becomingoverloaded and the queue overflowing.

Work area

Who is allowed
SAP and customer

Limitation for os

Limitation for db

Other parameter
zsca/exchange_mode zsca/reorg_mode