You need to figure out the table which is feeling more. Please run query from KB76720.
Once we isolate which table is filling up more frequently then we can plan accordingly.
It looks like EPOEvents + SC tables has huge records.
Please isolate the events which are filling more frequently to EPOevents table. KB83652
Based on event ID, you can Tune the product policy so that we will not have this much excessive event generation.
For help in tuning up the policy, please open SR with support.
Other than the event table, the SC tables are for solidcore. Solidcore/Application Control can generate a huge amount of events, typically you have a lot of devices where the policy has not been tuned.