Solution

  1. Identify queries where the individual rows exceed the current max_allowed_packet limit. Such queries need to be rewritten to reduce the amount of data being returned. This can be done by having a smaller number of columns in the SELECT statement or choosing a smaller data type for various columns as part of the table design. If you have a New Relic account, use the New Relic APM Errors page and the New Relic APM Databases page, and New Relic Logs to search for the relevant queries.

  2. For quick remediation, you can temporarily request the max_allowed_packet size to be increased when you submit a ticket, but this is at the discretion of the Customer Engineering team, as too large of a value can cause replication failures by causing network congestion.

  3. As a best practice, you should run the following command in your CLI for some of your large database tables:

    show table status like [table name to match]
    

    Evaluate the queries running on these tables to determine if you are exceeding the recommended max_allowed_packet size of 16MB. Follow the same process in step one to reduce the data being returned by such queries.

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