Diagnosis
While logging the query-runtime statistics, each call of the statisticmethods is recorded and written to the table RSDDSTATLOGGING. A largedata set is created then; the runtime of the query is impaired. For thisreason, you should only use this option when you are looking for errorsin the statistics. SAP recommends that you deactivate this optionimmediately afterwards and that you regularly empty the tableRSDDSTATLOGGING.
You issue statistics logging for your user by deleting the row with youruser in the table RSDDSTATLOGUSER.
Note that logging the statistics is different from normal writing ofstatistic data during query execution.