Managing Short Dumps 
A short dump is saved in the database table SNAP in the error log for every runtime error that occurs in an ABAP system. Unless they are intended for retention and marked accordingly, these long texts are automatically released for deletion four weeks after they are generated.
The deletion of old short dumps takes place successively: if a program that is running in a SAP GUI window terminates with a runtime error and the short dump is displayed immediately, older short dumps are searched and deleted (for performance reasons, a maximum of 100). The number of short dumps not intended for retention in an ABAP system is therefore regularly regulated.
This mechanism does not apply, however, if a runtime error occurs during background processing, an RFC call (including JCo), or an HTTP call. It is therefore also possible to selectively manually delete short dumps from the database. To do this, on the initial screen of the transaction ABAP Dump Analysis (ST22), choose the Goto menu and the Reorganize option.
A selection screen appears, on which you can define the age as of which the short dumps are to be deleted.
If you need to regularly perform reorganization operations in a system and want to automate this step, you can schedule the program RSSNAPDL. This program provides the same function as the menu option Reorganize.
You can view the current size of table SNAP at any time by choosing the SNAP Statistics option from the Goto menu.
You can prevent a short dump being automatically deleted. Start the ABAP Dump Analysis (St22) for this and select the related runtime error. Choose from the menu. The short dump is then stored in the database until you revoke the lock using the same function.
See also SAP Note 11838.