Following https://www.keithf4.com/a-large-database-does-not-mean-large-shared_buffers/
and http://pgtune.leopard.in.ua/ and https://wiki.postgresql.org/wiki/Tuning_Your_PostgreSQL_Server I changed the shared_buffer from 51GB to 35GB. Now, I'm getting spikes every 15 minutes. *FATAL*: sorry, too many clients already The change have been made 3 hours ago. - we rebooted the server as well Might be the cache warming up again?
