Bacula-users

Re: [Bacula-users] MySQL "hangs", jobs hang. Well not really, but

2014-03-25 11:06:57
Subject: Re: [Bacula-users] MySQL "hangs", jobs hang. Well not really, but
From: Kern Sibbald <kern AT sibbald DOT com>
To: Jari Fredriksson <jarif AT iki DOT fi>, bacula-users AT lists.sourceforge DOT net
Date: Tue, 25 Mar 2014 16:04:27 +0100
Hello,

Aside from tuning as recommended by Gary, did you add any new indexes recently?  Often users a new indexes because they speed up some particular operation, but because of the complexities of SQL, those indexes can seriously slow down other queries such as batch insert which is what I imagine is taking the time in your case.

Best regards,
Kern


On 14-03-24 10:19 AM, Jari Fredriksson wrote:
26.02.2014 12:00, Jari Fredriksson kirjoitti:
MySQL process keeps on running at 100% CPU and is processing

SELECT Path.Path, Filename.Name, Temp.FileIndex, Temp.JobId, LStat, MD5
FROM ( SELECT FileId, Job.JobId AS JobId, FileIndex, File.PathId AS
PathId, File.FilenameId AS FilenameId, LStat, MD5 FROM Job, File, (
SELECT MAX(JobTDate) AS JobTDate, PathId, FilenameId FROM ( SELECT
JobTDate, PathId, FilenameId FROM File JOIN Job USING (JobId) WHERE
File.JobId IN (7088,7196,7204,7260) UNION ALL SELECT JobTDate, PathId,
FilenameId FROM BaseFiles JOIN File USING (FileId) JOIN Job  ON   
(BaseJobId = Job.JobId) WHERE BaseFiles.JobId IN (7088,7196,7204,7260) )
AS tmp GROUP BY PathId, FilenameId ) AS T1 WHERE (Job.JobId IN ( SELECT
DISTINCT BaseJobId FROM BaseFiles WHERE JobId IN (7088,7196,7204,7260))
OR Job.JobId IN (7088,7196,7204,7260)) AND T1.JobTDate = Job.JobTDate
AND Job.JobId = File.JobId AND T1.PathId = File.PathId AND T1.FilenameId
= File.FilenameId ) AS Temp JOIN Filename ON (Filename.FilenameId =
Temp.FilenameId) JOIN Path ON (Path.PathId = Temp.PathId) WHERE
FileIndex > 0 ORDER BY Temp.JobId, FileIndex ASC

My setup has worked flawlessly for years, and now suddenly this.

This is on CentOS 6.5 with Version: 5.0.0 (26 January 2010)

Any thoughts, what might cause this?


I dropped the database, recretead it again. The problems stays! I wonder
if 5.0.0. has some inherent problem into it, that is the version in
CentOS 6.5.

Irritating.





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this first edition is now available. Download your free book today!
http://p.sf.net/sfu/13534_NeoTech
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