Bug #75962 Innodb calls fsync when freeing a LRU page to fulfill page request
Submitted: 19 Feb 2015 3:14 Modified: 3 Mar 2015 20:46
Reporter: Tianzhou Chen Email Updates:
Status: Verified Impact on me:
None 
Category:MySQL Server: InnoDB storage engine Severity:S3 (Non-critical)
Version:5.6.24, 5.7.6 OS:Any
Assigned to: CPU Architecture:Any
Tags: fsync, innodb, performance

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: