1) We can choose how many days to retain alerts. I was thinking of 30 days or more (maybe indefinite), but want to know how much alerts storing affects the server. Is it just having of more kilobytes for the server (database), or does it indeed slow the server in some kind of way? 2) The same question about read marking data. For this I wanted choose 90 days or maybe indefinite time. How much or how does this affect the server?