Bug #40113 Embedded SELECT inside UPDATE or DELETE can timeout without error
Submitted: 17 Oct 2008 15:51 Modified: 7 Aug 2009 0:52
Reporter: Bob Hansen Email Updates:
Status: Closed Impact on me:
None 
Category:MySQL Server: Locking Severity:S2 (Serious)
Version:5.0, 5.1, 6.0 bzr OS:Any (Linux, Win XP SP2 32bit)
Assigned to: Georgi Kodinov CPU Architecture:Any
Tags: Embedded Select Timeout Error Fail Secretly Silent Update Delete, regression

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:

[17 Oct 2008 15:52] Bob Hansen
Succeed but timeout and no data changed.

Attachment: delete and insert lock too.JPG (image/jpeg, text), 114.52 KiB.