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tehlike
I generally use this: https://pgtune.leopard.in.ua/
arkh
Yup, I was expecting pgtune being mentioned in the article.

And maybe something like HammerDB to check performances.

fix4fun
Nice tool. Do you know maybe similar tool for MySQL ?
qeternity
Does not instill confidence when the queries they provide don't work.

For anyone curious, the corrected query:

SELECT sum(blks_hit)::numeric / nullif(sum(blks_hit + blks_read), 0) AS cache_hit_ratio FROM pg_stat_database;

HackerThemAll
"How do we size shared_buffers? A common starting rule of thumb is:"

I have an improved rule of thumb:

Give a lot of RAM. Give it all the RAM you can. And then buy some more and also give it to shared_buffers. Buffering data in RAM/CPU cache is crucial for performance.