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Asked: 2026-06-18T12:04:17+00:00

I am trying to put a large amount of data into a database. I

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I am trying to put a large amount of data into a database.

I have observed that when the data is a lot greater than 1Mb, I get a 500 – Mysql has gone away error.

When the data is closer to the 1Mb mark, I get an error stating that the max packet size has been reached.

When the data is less than or equal to 1Mb, the query succeeds every time.

I have had a look max_allowed_packet in my.ini (I’m running on a Windows machine), and set it to 16M and even increased it higher. I have made sure that I have restarted mysql too.

But the same behavior is happening. Is there another setting somewhere that I am missing? For your information, I am using PHP to run the queries.

Thanks.

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1 Answer

  1. Editorial Team

    Turns out that I needed to change it in two places. I discovered on phpMyAdmin, under settings and variables that max packets allowed was indeed still 1M, despite me changing it in the config.

    With this new information, I was able to focus my searches and it led me to

    SET @@global.max_allowed_packet=n

    Which showed me exactly how to change the global settings!

    Problem is, I think if the server resets, it goes back to what it was, I need to do some settings file. More complications that I don’t need right now.

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