6 февр. 2015 г. · Instead of using a huge IN -list, join on a VALUES expression, or if the list is large enough, use a temp table, index it, then join on it.

30 сент. 2016 г. · Views are typically useful for speeding up the development process but in the long run can completely kill database performance.

3 апр. 2014 г. · That means Postgres has to read about 20% of the whole table to satisfy your query. Unless it can use an index-only scan, a sequential scan on ...

1 февр. 2024 г. · I have a table with millions of rows, and I want to find all rows that have any one of a supplied list of a few thousand values in a specific column.

24 июн. 2020 г. · After an upgrade from 11 to 12, a few queries started performing horribly. They went from taking ~1 second to ~5 minutes.

27 мар. 2024 г. · I am trying to squeeze out the all the performance from my PostgreSQL database, also I want to abstract my query definitions from my application layer.

14 дек. 2016 г. · A view cannot help you producing an aggregate based on unknown parameters ( business_id , start_date and end_date ).

21 сент. 2021 г. · I'm having a real hard time understanding why the operator "or" makes query planner not use the indexes at all. In any case the number of rows ...

11 мар. 2023 г. · COPY is fastest when used within the same transaction as an earlier CREATE TABLE or TRUNCATE command. In such cases no WAL needs to be written, ...

30 сент. 2022 г. · The usual recommendation is to be at around 25% and 75% of the total RAM, on a dedicated to Postgres server. Best settings certainly depend on ...