Bug #70139 Performance of "ALTER TABLE..." queries
Submitted: 23 Aug 2013 16:03 Modified: 23 Jun 2014 9:17
Reporter: Egor Korobitsin Email Updates:
Status: Closed Impact on me:
None 
Category:MySQL Server: InnoDB Plugin storage engine Severity:S5 (Performance)
Version:5.1.72 OS:Windows
Assigned to: CPU Architecture:Any
Tags: performance

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: