Bug #87382 no mention in 5.7 documentation that mysqld.cnf is the authoritative option file
Submitted: 10 Aug 2017 19:39 Modified: 11 Aug 2017 13:17
Reporter: Brock Walters Email Updates:
Status: Not a Bug Impact on me:
None 
Category:MySQL Server: Documentation Severity:S2 (Serious)
Version:5.7.19-0ubuntu0.16.04.1 OS:Ubuntu (16.04.1)
Assigned to: CPU Architecture:Any
Tags: cnf, configuration, my.cnf, mysqld.cnf, option-file

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: