Just checked to confirm my memory:
This is exactly the same as on a Moodle2.8 site - 10 items per page with pagination links at the bottom of the page.
In the Glossary settings > Appearance there is an 'Entries shown per page' which you can alter from the default 10 for each glossary and in the Site Admin > Plugins > Activity Modules > Glossaries you can alter that default on a site wide basis.
Possibly your upgrade has overridden that setting to change the previous behaviour you had on your site?
Hope that helps