Bug #52856 concurrent show columns or show full columns causes a crash!!!1
Submitted: 15 Apr 2010 10:10 Modified: 7 Jul 2010 19:47
Reporter: Shane Bester (Platinum Quality Contributor) Email Updates:
Status: Closed Impact on me:
None 
Category:MySQL Server: Locking Severity:S1 (Critical)
Version:5.5.3,5.5.4, 5.6.99 OS:Any (XP64, linux)
Assigned to: Sergei Glukhov CPU Architecture:Any
Tags: crash, regression, show full columns

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: