Bug #71964 Explanation of InnoDB physical row structure for CHAR is not clear.
Submitted: 7 Mar 2014 9:02 Modified: 13 Aug 2015 17:38
Reporter: Daniƫl van Eeden (OCA) Email Updates:
Status: Closed Impact on me:
None 
Category:MySQL Server: Documentation Severity:S3 (Non-critical)
Version:5.6.16 OS:Any
Assigned to: Daniel Price CPU Architecture:Any
Tags: innodb, storage, utf8, utf8mb4

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Description:
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If the data you need to attach is more than 50MB, you should create a compressed archive of the data, split it to 50MB chunks, and upload each of them as a separate attachment.

To split a large file: