- Community Home
- >
- Storage
- >
- Entry Storage Systems
- >
- Disk Enclosures
- >
- High average queue size
Disk Enclosures
1752782
Members
6124
Online
108789
Solutions
Forums
Categories
Company
Local Language
юдл
back
Forums
Discussions
Forums
- Data Protection and Retention
- Entry Storage Systems
- Legacy
- Midrange and Enterprise Storage
- Storage Networking
- HPE Nimble Storage
Discussions
Discussions
Discussions
Forums
Forums
Discussions
юдл
back
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
- BladeSystem Infrastructure and Application Solutions
- Appliance Servers
- Alpha Servers
- BackOffice Products
- Internet Products
- HPE 9000 and HPE e3000 Servers
- Networking
- Netservers
- Secure OS Software for Linux
- Server Management (Insight Manager 7)
- Windows Server 2003
- Operating System - Tru64 Unix
- ProLiant Deployment and Provisioning
- Linux-Based Community / Regional
- Microsoft System Center Integration
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Blogs
Information
Community
Resources
Community Language
Language
Forums
Blogs
Topic Options
- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Printer Friendly Page
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО01-20-2006 03:33 AM
тАО01-20-2006 03:33 AM
High average queue size
Hello, sirs:
Attached file is a collect of sar -d (only average finals are showed) for a server connected to an EMC Symmetrix Array, running for about 1 hour. EMC PowerPath is installed. Almost all disk showed in the list are 71 GB.
Disks c5t5d5 and c5t5d6 are consistenly high in average queue size, even when they don't seem to be most I/O requested ones. From this, I have two questions I hope you can help me with:
1. May be it is because, for those disks, the writes are quite greater than reads, as the column in the reports (r+w/s) shows the sum of both values?
2. Could an adjustment to scsi_max_qdepth improve disk I/O in this case?
Any other detail you can discover in thisn report may be helpfull for me. Thanks in advance.
Jose Enrique
Attached file is a collect of sar -d (only average finals are showed) for a server connected to an EMC Symmetrix Array, running for about 1 hour. EMC PowerPath is installed. Almost all disk showed in the list are 71 GB.
Disks c5t5d5 and c5t5d6 are consistenly high in average queue size, even when they don't seem to be most I/O requested ones. From this, I have two questions I hope you can help me with:
1. May be it is because, for those disks, the writes are quite greater than reads, as the column in the reports (r+w/s) shows the sum of both values?
2. Could an adjustment to scsi_max_qdepth improve disk I/O in this case?
Any other detail you can discover in thisn report may be helpfull for me. Thanks in advance.
Jose Enrique
2 REPLIES 2
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО01-20-2006 04:00 AM
тАО01-20-2006 04:00 AM
Re: High average queue size
What do you have carved up on those 2 disks - t5 and 56? Are you using LVM or VxVM? Can you send a layout of the lvol or vol those disks are part of?
Your queue values are unacceptably very high indeed.
Your queue values are unacceptably very high indeed.
Hakuna Matata.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО01-20-2006 05:06 AM
тАО01-20-2006 05:06 AM
Re: High average queue size
I am using LVM. All disks in controllers c5 and c7 are Symmetrix disks hsoting raw devices for Oracle database.
The opinions expressed above are the personal opinions of the authors, not of Hewlett Packard Enterprise. By using this site, you accept the Terms of Use and Rules of Participation.
News and Events
Support
© Copyright 2024 Hewlett Packard Enterprise Development LP