LUA purge

Hello,

purge of the Manage Update folder is set weekly for revision older than 4.

=> How are considered the 4 revisions : the 4 last I have on my LUA server or the 4 last available at Symantec company ?

As I download updates only once a day, instead of havin 3 revisions per day, I only have one. So is it 3 or 1 per day that is considered with this setting ?

First can explain I'll keep 2 days of revisions finally and second one 4 days...

LUA version is 2.3.1

Thanks in advance for your help.

Regards