MySQL Hash Join Memory Limit Exceeded: Troubleshooting and Solutions

This error message indicates that the memory used by a hash join operation has exceeded the limit. The backend server with IP address 192.168.200.249 is processing a fragment with ID 'ac910b0e132944d4-8a7159971cd9f3a5'. The amount of memory used is 2147520512, which is greater than the limit of 2147483648.

To address this issue, you can try increasing the memory limit by setting the session variable 'exec_mem_limit' to a higher value. This can be done using a query like:

SET exec_mem_limit = <new_limit>;

Replace '<new_limit>' with the desired memory limit in bytes.

Note that increasing the memory limit may have performance implications and could potentially lead to further memory-related issues. It's recommended to analyze the query and optimize it if possible to reduce memory usage instead of relying solely on increasing the memory limit.