Bug #91852 SET READ_ONLY=1 sometimes doesn't block concurrent DDL.
Submitted: 1 Aug 2018 12:59 Modified: 7 Oct 2019 17:54
Reporter: Dmitry Lenev Email Updates:
Status: Closed Impact on me:
None 
Category:MySQL Server: Locking Severity:S3 (Non-critical)
Version:5.7.24 OS:Any
Assigned to: CPU Architecture:Any

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: