I've been working on this task T226068 and had a question related to it for the DBA team.
In short, we are running a promo campaign on the mobile site (e.g. https://en.m.wikipedia.org) for a new feature. We want to show a drawer promoting the feature to each logged in user on the mobile site, but they should only see the drawer once. One of the solutions we were considering was to create a record in the user_properties table to mark when a logged in user has seen the drawer so that they would not see it again.
However, this would effectively mean that there would be a record created for each logged in user of the mobile site. Would adding this number of records (also considering frequency) to the user_properties table be okay?