After the installation of an SAP system, all ABAP programs and other objects are available as source code. When transactions are called for the first time, corresponding programs are generated and compiled automatically (that is, their loads are generated). This process can take several seconds. When transactions are called a subsequent time, the access is faster because the loads already exist. To avoid delays when a transactions is called for the first time, you can use transaction SGEN and start the SAP Load Generator.
The following figure shows three SAP Load Generator screens. The first two screens offer load generation options and the third screen enables you to monitor the progress of load generation. In addition to providing progress information about current generation jobs or jobs that have already run, the screen displays other information such as predictions about the duration of a load generation.
