/ReduceEventLogSize <date> [-saveAs <file name>] [-KeepSplitting] 

Reduces event log size. The following parameters are available:

Date. New event log boundary in the following format: YYYY-MM-DD.
-saveAs <file name>. File for saving the removed log records.
-KeepSplitting. Keep splitting the log into files by period.

Attention! If you specify a file with its full path, ensure that all of the directories that form the path exist.