Yup, I was expecting pgtune being mentioned in the article.
And maybe something like HammerDB to check performances.
fix4fun 70 days ago [-]
Nice tool. Do you know maybe similar tool for MySQL ?
iberator 70 days ago [-]
[flagged]
HackerThemAll 68 days ago [-]
"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.
Rendered at 07:54:43 GMT+0000 (UTC) with Wasmer Edge.
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;
postgres=# show server_version; server_version ------------------------------- 17.7 (Debian 17.7-3.pgdg13+1) (1 row)
postgres=# SELECT sum(blks_hit)/nullif(sum(blks_hit+blks_read),0) AS cache_hit_ratio FROM Pg_stat_database; cache_hit_ratio ------------------------ 0.99448341937558994728 (1 row)
And maybe something like HammerDB to check performances.
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.