There are a couple of different ways to collect usage events in the latest versions. One should be automatic: the generic plugin “Usage Statistics” in concert with the generic plugin “Acron”. The other is manual processing of your webserver’s log files.
Do you know which method is active for you? Check if both the “Usage Statistics” and “Acron” plugin are enabled; if you have disabled one or the other, have you created specific cron jobs for processing the log files?
If you are looking at your webserver’s access log and not seeing the article galley views, that is odd. Note that the URL will be very similar to the abstract view - with just an additional galley id behind the article id.