any experience with that - can someone suggest what tools to use, what guides to read and so on ? Any information would be appreciated
See https://www.postgresql.org/docs/current/using-explain.html and https://wiki.postgresql.org/wiki/Using_EXPLAIN If you have a specific problematic query — you could try this script and share the result (using a paste site, perhaps):
Can you explain please how to use that .sql ? Im saving it in db then saving another sql I want to analyze and use it as function or how ?
It's explained in the comments inside (note it's psql script, you won't be able to use it in another client, AFAIK). Is there anything that's not clear there?
Sorry missed -- Replace this comment with your SELECT query this line. Thanks
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