Bug #60778 myisamchk -n corrupts the spatial index
Submitted: 6 Apr 2011 12:05 Modified: 6 Apr 2011 13:04
Reporter: Vsevolod Novikov Email Updates:
Status: Verified Impact on me:
None 
Category:MySQL Server: MyISAM storage engine Severity:S3 (Non-critical)
Version:5.1.55, 5.5.12 OS:Any
Assigned to: CPU Architecture:Any
Tags: corruption, filesort, myisam, MyISAMchk, spatial

File: Maximum allowed size is 50MB.
Description:
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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: