Bug #83180 Long running DDL statement could cause information_schema.tables to wait on MDL
Submitted: 28 Sep 2016 7:14 Modified: 28 Sep 2016 7:45
Reporter: Jaime Sicam Email Updates:
Status: Verified Impact on me:
None 
Category:MySQL Server: Locking Severity:S3 (Non-critical)
Version:5.6.29, 5.7.15 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: