Dbvisit Standby produces trace file every time it executes. Following parameters are used to manage the trace files:

NUM_TRACE_TO_KEEP = The number of trace files to keep after which trace files are deleted.

DAYS_TO_KEEP_TRACE = The number of days to keep the trace files after which trace files are deleted.

Default settings are:

NUM_TRACE_TO_KEEP = 200 

DAYS_TO_KEEP_TRACE = 15

Least restrictive setting applies between DAYS_TO_KEEP_TRACE and NUM_TRACE_TO_KEEP. 

To turn off, set to 0.

These values can be changed in the DDC file on primary server. The perform transfer/apply of logs, with this the DDC file on the standby server will get updated to primary server DDC automatically.