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I have run into a problem of file sizes maxing out on 256MB.

On PHP side I have
upload_max_filesize & post_max_size set to 1GB

I've created a simple PHP script to test upload size and managed to upload 800MB file. So everything points to Craft having some limits.

In Craft CMS config file I have:

'maxUploadFileSize'     => 1073741824

Yet if I try to upload files larger than 256MB I get a modal message saying file size exceeds 256MB.

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2 Answers 2

Reset to default
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When determining the maximum upload file size, Craft first takes the php.ini file upload_max_filesize, post_max_size and memory_limit into account by getting the minimum value and only then applying the Craft maxUploadFileSize config setting.

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  • Is this still true for Craft 3? Does Craft always read the entire file into memory when uploading?
    – Simon East
    Commented Jan 29, 2019 at 0:02
  • Yes. Just ran into this on a new site. memory_limit was set to 256, and that was the deciding factor in file size upload limit.
    – darylknight
    Commented Jul 22, 2021 at 14:40
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Apparently, Craft requires memory_limit to also be set to max value, so setting memory_limit in php.ini did solve my problem.

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