[ahachete]

If using SSD or similar fast storage subsystem, or those that hide a higher random access time vs sequential, you may indeed want to reduce random_page_cost to make random_page_cost / seq_page_cost in the 1.2-1.5 range.

But it's also wise to review the default_statistics_target being used, that autovacuum is running frequently enough (which does autoanalyze), that the analyze thresholds are also properly tuned...

Thank you for mentioning https://postgresqlco.nf Team member here :) All these parameters mentioned here are well documented there, with recommendations.

Also, have you tried the Tuning Guide? (https://postgresqlco.nf/tuning-guide)