Use the <log type> (Purge Settings) screen to configure purge
settings.
Open
the <log type> (Purge Settings) screen.
On the working area,
select Enable automatic purge of <log
type>.
Specify the Maximum
number of logs that will be retained (in terms of the number of
log entries).
In Purge setting, specify
the age of logs that will be purged.
In Purge offset, specify
the number of logs to be removed
when the Maximum number of logs,
is reached.
Click Save.