Bug #69679 utf8mb4_general_ci considers from u+20000 characters as identical
Submitted: 5 Jul 2013 17:23 Modified: 19 Jun 2014 5:57
Reporter: Arnaud Adant Email Updates:
Status: Not a Bug Impact on me:
None 
Category:MySQL Server: Charsets Severity:S3 (Non-critical)
Version:5.5.32 OS:Any
Assigned to: CPU Architecture:Any
Tags: utf8mb4 charset collation

File: Maximum allowed size is 50MB.
Description:
Privacy:

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: