??Boost Your Query Performance in MySQL!??

Question: Are you using IN/BETWEEN/NOT IN/<>/!=/>/</>=/<=, and your query is still taking too long to execute even after setting correct indexes on the right columns? ??

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Answer: Increase range_optimizer_max_mem_size! By default, it's set to 8MB. Increasing it to 16MB (or more, depending on your workload and server capacity) can significantly enhance query performance.

Here's how you can change range_optimizer_max_mem_size:

Open your MySQL prompt.

• ?Check Current Value:

SHOW VARIABLES LIKE ‘range_optimizer_max_mem_size’;        

• ?Query to Analyze:

EXPLAIN SELECT * FROM table WHERE datecolumn BETWEEN '2023-01-01' AND '2023-12-31';        

• ?Adjust Memory: Execute the following command:

SET GLOBAL range_optimizer_max_mem_size = 16777216;        

• ?Query to ReAnalyze:

EXPLAIN SELECT * FROM table WHERE datecolumn BETWEEN '2023-01-01' AND '2023-12-31';        

?Note: This applies to MySQL 5.7 and later versions. Since it's a dynamic value, you can change this parameter without restarting the server.

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