PostgreSQL: Performance Issues with Large JSONB Column Queries in v14
I'm trying to debug I'm working through a tutorial and I'm updating my dependencies and I've been banging my head against this for hours. I'm sure I'm missing something obvious here, but I'm experiencing significant performance degradation when querying a table with a large JSONB column in PostgreSQL 14... The table in question has over 1 million rows, and I frequently need to run queries that filter based on keys within the JSONB data. For example, I have a query like this: ```sql SELECT * FROM my_table WHERE my_jsonb_column->>'status' = 'active'; ``` While this query runs, it takes over 30 seconds to complete, which is unacceptably slow for my application. I've checked the execution plan using `EXPLAIN ANALYZE` and noticed that it's doing a sequential scan rather than using an index. To try to speed this up, I created a GIN index on the JSONB column: ```sql CREATE INDEX idx_my_table_status ON my_table USING GIN (my_jsonb_column); ``` However, the performance has not improved. I attempted to use the `jsonb_path_ops` option for the index, but encountered an error because I need to query for a specific key, and `jsonb_path_ops` doesn’t support that. I've also tried breaking down the JSONB data into smaller, normalized tables, but this adds complexity to my application and doesn't yield the performance improvements I hoped for. I'm looking for suggestions on how to optimize these queries further. Are there best practices for indexing JSONB columns that I might be missing? Is there a way to hint PostgreSQL to use the index I've created? Any advice on reworking my queries for better performance would also be appreciated. Any ideas what could be causing this? Am I missing something obvious? This is for a microservice running on Windows 11.