MySQL Bugs: #63815: Reorganization May Make a Page Incompressible

Bug #63815	Reorganization May Make a Page Incompressible
Submitted:	21 Dec 2011 2:51	Modified:	18 Oct 2012 22:06
Reporter:	Nizameddin Ordulu	Email Updates:
Status:	Closed	Impact on me:	None
Category:	MySQL Server: InnoDB Plugin storage engine	Severity:	S1 (Critical)
Version:		OS:	Any
Assigned to:		CPU Architecture:	Any
Tags:	btr_cur_optimistic_update, btr_cur_update_alloc_zip, compression, innodb

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:

On *nix platforms use the split command e.g. split -b 50MB <my_large_archive> <my_split_archive_prefix>
On windows use WinZip or a similar utility to split the large file

make page_zip_compress() return FALSE randomly.

Attachment: simulate_comp_failures.patch (application/octet-stream, text), 9.62 KiB.

fix the bugs

Attachment: 63815.patch (application/octet-stream, text), 2.40 KiB.