MySQL 8.0: Unexpectedly High Memory Usage with JSON Functions in Stored Procedures
I'm relatively new to this, so bear with me... I'm getting frustrated with I'm prototyping a solution and I've been struggling with this for a few days now and could really use some help. I'm relatively new to this, so bear with me. I'm working with an scenario with high memory usage after migrating to MySQL 8.0, specifically when using JSON functions in my stored procedures. I've noticed that when I call a stored procedure that manipulates large JSON datasets, MySQL's memory consumption spikes significantly, leading to performance degradation and even occasional crashes. Here's a simplified version of my stored procedure: ```sql DELIMITER $$ CREATE PROCEDURE `process_json_data`(IN jsonData JSON) BEGIN DECLARE itemCount INT; SET itemCount = JSON_LENGTH(jsonData); DECLARE idx INT DEFAULT 0; WHILE idx < itemCount DO SET @currentItem = JSON_UNQUOTE(JSON_EXTRACT(jsonData, CONCAT('$[', idx, ']'))); -- Simulate some processing on the JSON data INSERT INTO processed_data (item) VALUES (@currentItem); SET idx = idx + 1; END WHILE; END$$ DELIMITER ; ``` When I execute this procedure with a JSON array containing around 10,000 items, the server's memory usage soars to over 80% of total allocated memory. I'm running this on a dedicated MySQL server with 16 GB of RAM, which should typically handle this load without issues. I have tried optimizing the procedure by removing unnecessary JSON calls and breaking down the input data into smaller batches, but the memory usage remains high. My MySQL configuration includes: ```ini [mysqld] innodb_buffer_pool_size = 8G max_connections = 200 tmp_table_size = 64M max_heap_table_size = 64M ``` I also checked the MySQL behavior logs and found a few warnings related to memory allocation, but nothing that pointed to a specific scenario. Has anyone else faced similar problems with JSON functions in MySQL 8.0, or does anyone have suggestions on how to optimize memory usage in such scenarios? Any guidance on best practices for handling large JSON datasets in stored procedures would be greatly appreciated. My development environment is Ubuntu. Any ideas what could be causing this? I'm working on a web app that needs to handle this. What's the best practice here? My development environment is Linux. My team is using Sql for this web app. Is there a simpler solution I'm overlooking? Has anyone else encountered this? I recently upgraded to Sql 3.10. Cheers for any assistance!