Click here to monitor SSC
SQLServerCentral is supported by Redgate
 
Log in  ::  Register  ::  Not logged in
 
 
 


Disk_Queue_Length is CRITICAL or high


Disk_Queue_Length is CRITICAL or high

Author
Message
katukuri.sqldba
katukuri.sqldba
Grasshopper
Grasshopper (13 reputation)Grasshopper (13 reputation)Grasshopper (13 reputation)Grasshopper (13 reputation)Grasshopper (13 reputation)Grasshopper (13 reputation)Grasshopper (13 reputation)Grasshopper (13 reputation)

Group: General Forum Members
Points: 13 Visits: 111
This is regarding the Cluster servers 723/722/721 3 Nodes (Active/Active/Passive). At around Fri Mar 29 11:05:42 EDT 2013, We have got alert from monitoring agent Nagios that “Disk_Queue_Length is CRITICAL” and during that time SQL stopped responding for a couple minutes and this happened about 3 times.
Since that time I disabled the Nagios alert on that particular event.

Storage Team/Backup Team/Wintel Team - saying that no issues found from their end.

Windows Administration team says its everything normal on their side.

SQL Team - Saying that when this issue happened that time there was no jobs were running on this cluster and no issues.

Can any one suggest here where exactly issue is and how to resolve this issue.
Thanks a million in advance.
Geoff A
Geoff A
SSChasing Mays
SSChasing Mays (606 reputation)SSChasing Mays (606 reputation)SSChasing Mays (606 reputation)SSChasing Mays (606 reputation)SSChasing Mays (606 reputation)SSChasing Mays (606 reputation)SSChasing Mays (606 reputation)SSChasing Mays (606 reputation)

Group: General Forum Members
Points: 606 Visits: 1793
you run anti-virus on those nodes? I always check anti-virus logs when all else appears normal.
katukuri.sqldba
katukuri.sqldba
Grasshopper
Grasshopper (13 reputation)Grasshopper (13 reputation)Grasshopper (13 reputation)Grasshopper (13 reputation)Grasshopper (13 reputation)Grasshopper (13 reputation)Grasshopper (13 reputation)Grasshopper (13 reputation)

Group: General Forum Members
Points: 13 Visits: 111
hi Geoff A
Thanks for your reply,

I gone through the antivirus log file, but could not find any thing related to the mdf or ldf files.
will there be any other issues ?, because we disabled the monitoring alert on the cluster nodes regarding this issue,

I think, I should go for Microsoft support.

Thanks alot.
Steve Jones
Steve Jones
SSC-Dedicated
SSC-Dedicated (36K reputation)SSC-Dedicated (36K reputation)SSC-Dedicated (36K reputation)SSC-Dedicated (36K reputation)SSC-Dedicated (36K reputation)SSC-Dedicated (36K reputation)SSC-Dedicated (36K reputation)SSC-Dedicated (36K reputation)

Group: Administrators
Points: 36150 Visits: 18751
Before you call CSS, I would check the underlying SAN LUNs and be sure there isn't contention there. The SAN admins often look at averages, but if they've carved up physical disks and shared them among LUNs, there can be some contention from other systems.

No A/V is good, have you also checked if some type of backup or snapshotting was occurring at this time? Anything that might have frozen disk access briefly for SQL Server?

Follow me on Twitter: @way0utwest
Forum Etiquette: How to post data/code on a forum to get the best help
My Blog: www.voiceofthedba.com
TheSQLGuru
TheSQLGuru
SSCertifiable
SSCertifiable (6K reputation)SSCertifiable (6K reputation)SSCertifiable (6K reputation)SSCertifiable (6K reputation)SSCertifiable (6K reputation)SSCertifiable (6K reputation)SSCertifiable (6K reputation)SSCertifiable (6K reputation)

Group: General Forum Members
Points: 5964 Visits: 8313
There are quite a number of things that could be at fault here, especially given the clustering setup you have. I would review every error log you can get your hands on before going to external support. I believe you can get better and MUCH less expensive help than Microsoft CSS too, but I am a tad biased on that statement. Hehe

Best,

Kevin G. Boles
SQL Server Consultant
SQL MVP 2007-2012
TheSQLGuru at GMail
SQL Show
SQL Show
Old Hand
Old Hand (393 reputation)Old Hand (393 reputation)Old Hand (393 reputation)Old Hand (393 reputation)Old Hand (393 reputation)Old Hand (393 reputation)Old Hand (393 reputation)Old Hand (393 reputation)

Group: General Forum Members
Points: 393 Visits: 1078
Can you check your error log for IO take longer duration warning message?
Go


Permissions

You can't post new topics.
You can't post topic replies.
You can't post new polls.
You can't post replies to polls.
You can't edit your own topics.
You can't delete your own topics.
You can't edit other topics.
You can't delete other topics.
You can't edit your own posts.
You can't edit other posts.
You can't delete your own posts.
You can't delete other posts.
You can't post events.
You can't edit your own events.
You can't edit other events.
You can't delete your own events.
You can't delete other events.
You can't send private messages.
You can't send emails.
You can read topics.
You can't vote in polls.
You can't upload attachments.
You can download attachments.
You can't post HTML code.
You can't edit HTML code.
You can't post IFCode.
You can't post JavaScript.
You can post emoticons.
You can't post or upload images.

Select a forum

































































































































































SQLServerCentral


Search