SQLite PRAGMA cache_size not affecting performance in Python application
I've spent hours debugging this and I'm maintaining legacy code that I'm converting an old project and I'm currently working on a Python application that uses SQLite for database management, and I've been trying to optimize query performance..... I came across the `PRAGMA cache_size` command and set it with the following code: ```python import sqlite3 connection = sqlite3.connect('my_database.db') cursor = connection.cursor() # Setting cache size to 10000 pages (approximately 40MB) cursor.execute("PRAGMA cache_size = 10000") connection.commit() ``` However, I'm not seeing any noticeable improvement in performance, especially with larger queries. After executing several read operations, I noticed the performance remains the same as before. I also tried examining the cache size using: ```python cursor.execute("PRAGMA cache_size") print(cursor.fetchone()) ``` This confirms that the cache size is set correctly, but I feel like the performance metrics aren't changing. I'm using SQLite version 3.36.0 and Python 3.9. I've also tried analyzing my queries with the `EXPLAIN QUERY PLAN` command to see if they are optimized: ```python cursor.execute("EXPLAIN QUERY PLAN SELECT * FROM my_table WHERE column_x = ?", (value,)) print(cursor.fetchall()) ``` The output suggests that the query is using a full table scan, which isn't ideal. I've created an index on `column_x`, but performance still lags. Additionally, I'm running this on a local development environment, and my database is relatively small, with around 50,000 rows. Could it be that the cache size isn't impacting performance because of the database size, or is there something else I might be missing? Any insights on optimizing SQLite performance in this context would be greatly appreciated! I've been using Python for about a year now. Any pointers in the right direction? I'm on Windows 10 using the latest version of Python. Thanks, I really appreciate it! This is part of a larger application I'm building.