Bug #80115 Misleading message about Page cleaner thread priority
Submitted: 22 Jan 2016 12:04
Reporter: Andrii Nikitin Email Updates:
Status: Verified Impact on me:
None 
Category:MySQL Server: InnoDB storage engine Severity:S3 (Non-critical)
Version:5.7.10 OS:Any (Linux)
Assigned to: CPU Architecture:Any

[22 Jan 2016 12:04] Andrii Nikitin 
Description:
Reg. comment in bug #76766 - this current message is misleading:

[Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().

How to repeat:
Observe message in most of environments

Suggested fix:
Display something which will clearly indicate:
- failure in attempt to change thread priority
- where to get more info

[Note] InnoDB: Couldn't change thread priority for Page cleaner. See documentation regarding innodb_page_cleaners to understand related risks
[25 Jan 2016 8:48] Simon Mudd 
If possible try to make the documentation specific for those platforms that Oracle supports, such as RHEL/EOL 6,7 etc.
[31 Aug 2017 9:40] MySQL Verification Team 
See https://bugs.mysql.com/bug.php?id=85175