ผรั่งมันบอกแบบนี้
Deleting 'C:\WINDOWS\TEMP\#sql_e7c_0.MYD' (or whatever) will get around the problem in the short term but won't stop it happening again.
(I am sure that defragmenting is irrelevant but harmless)
I believe there is a conflict between the way MySQL creates and deletes temporary files and various "resident" antivirus scanners, including McAfee and AVG 7.5
This is hard to test as the problem is somehow intermittent, but if you have a repeatable test case, try switching your resident virus checker off. I read a report elsewhere that someone attributed the problem to McAfee: I use AVG and the problem went away with AVG off and came back when I switched it back on...
So I created a new temp dir (C:\Program Files\MySQL\tmp) and specified this in my.ini
[mysqld]
...
tmpdir="C:/Program Files/MySQL/tmp/"
and then excluded this from AVG's Resident Shield scan.
FWIW I think MySQL should either cope better with this (maybe newer versions do), or explain it in their setup instructions (ditto).
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