https://support.quest.com/kb/4274705/the-tempdb-space-used-graph-doesn-t-add-up-to-the-internal-object-space-column-in-the-top-25-temdb-sessions-table
The TempDB Space Used graph doesn't add up to the Internal Object Space column in the Top 25 TemDB...
The sum of the Internal Object Space column in the Top 25 TempDB Sessions table does not add up to the value presented on the TempDB Space U 4274705