> Suggestion #1 is to turn off any write caching on the RAID controller. Using LSI MegaRAID we went from 3k to 5k tps to 18k just turning off write caching. Basically it just got in the way. Write caching is disabled because I removed the expansion card of the RAID controller. It didn’t let the server boot properly with SSDs mounted. Thank you for the suggestion Pietro Pugni -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance