MySQL Bugs: #88071: An arresting Performance degradation when set sort_buffer

Bug #88071	An arresting Performance degradation when set sort_buffer_size=32M
Submitted:	12 Oct 2017 8:17	Modified:	22 Dec 2017 12:55
Reporter:	ashe sun (OCA)	Email Updates:
Status:	No Feedback	Impact on me:	None
Category:	MySQL Server	Severity:	S3 (Non-critical)
Version:	5.7.19	OS:	Any
Assigned to:		CPU Architecture:	Any

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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

perf-sgv of different sort_buffer_size,you can open it with google browser

Attachment: sort_buffer_size_33550439.svg (image/svg+xml, text), 215.58 KiB.

sort_buffer_size_33550439

Attachment: sort_buffer_size_33550440.svg (image/svg+xml, text), 346.81 KiB.