Why Am I Getting 'Error while sending QUERY packet' When Inserting Large Data into a MySQL Database?

Query Execution Error on Data Insertion

Problem Description

While attempting to insert data into a database table, you encounter the error message "Error while sending QUERY packet." The data being inserted is over 16MB in size, and the corresponding column's datatype is set as "longtext," which should support up to 4GB of data.

Possible Causes

The problem may be related to the data size exceeding MySQL's limitations for packet size. Large data transfers are sent as packets, and MySQL has a default maximum packet size of 16MB.

Solution

To resolve the issue, there are two possible solutions:

1. Break the Query into Smaller Batches: Divide the large data into smaller batches and execute multiple queries to insert the data in chunks that fall within the packet size limit.
2. Increase the max_allowed_packet Size: You can modify MySQL's configuration to allow for larger packet sizes. Use the following command:

SET GLOBAL max_allowed_packet=524288000;

Additional Information

• The data type "longtext" in MySQL can hold up to 4GB of data, but the packet size limit imposed by MySQL may prevent large data insertions.
• The max_allowed_packet variable can be adjusted to increase the packet size limit, but it's important to consider the memory and performance implications of doing so.

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