Bug #21348 Memory storage engine poor performance relative to 4.1.20 and HASH vs BTREE
Submitted: 30 Jul 2006 10:37 Modified: 30 Sep 2006 12:46
Reporter: Edgar Scrase Email Updates:
Status: No Feedback Impact on me:
None 
Category:MySQL Server: Optimizer Severity:S5 (Performance)
Version:5.0.21 OS:Windows (Windows)
Assigned to: CPU Architecture:Any
Tags: HASH instead of BTREE, Indexing, Memory Engine, Poor 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: