- Community Home
- >
- Servers and Operating Systems
- >
- Operating Systems
- >
- Operating System - HP-UX
- >
- Re: Is using defrag good enough?
Operating System - HP-UX
1752290
Members
4895
Online
108786
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
Go to solution
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
тАО10-03-2008 07:24 AM
тАО10-03-2008 07:24 AM
Hello All,
We use defrag every month on our Oracle datamart server, but nowadays its taking up to 4 hours to finish defrag. I dont really see performance change after defrag but just the tightning of the data. would it be ok if I stop using defrag? or choose another way to defrag? seggestions please
Thanks
Rahul.
We use defrag every month on our Oracle datamart server, but nowadays its taking up to 4 hours to finish defrag. I dont really see performance change after defrag but just the tightning of the data. would it be ok if I stop using defrag? or choose another way to defrag? seggestions please
Thanks
Rahul.
Solved! Go to Solution.
3 REPLIES 3
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО10-03-2008 07:30 AM
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО10-03-2008 09:56 AM
тАО10-03-2008 09:56 AM
Re: Is using defrag good enough?
What makes you think that a defrag is even necessary? Oracle does not normally create and remove lots of files every day. Most Oracle designs create large files for the data storage that are mostly empty. Even if you have a bunch of applications using the same mount points as Oracle and those apps create and remove lots of files, you won't see any performance change at all for the Oracle files. Are you running fsadm to defrag because the -E and -D options report large fragmentation, or because PCs require it so Unix must need it too?
A badly fragmented lvol in VxFS filesystems is quite tricky to accomplish. With static files like Oracle, they don't change size so open, close, seek and read/write will see no change in performance. If you have performance issues, they are very likely not due to disk fragmentation but instead are caused by bad SQL code, missing or unbalanced index files, not enough (properly used) SGA, and lack of RAM.
Bill Hassell, sysadmin
A badly fragmented lvol in VxFS filesystems is quite tricky to accomplish. With static files like Oracle, they don't change size so open, close, seek and read/write will see no change in performance. If you have performance issues, they are very likely not due to disk fragmentation but instead are caused by bad SQL code, missing or unbalanced index files, not enough (properly used) SGA, and lack of RAM.
Bill Hassell, sysadmin
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО10-03-2008 11:25 AM
тАО10-03-2008 11:25 AM
Re: Is using defrag good enough?
Bill
Thanks a lot for that explaination,
Rahul.
Thanks a lot for that explaination,
Rahul.
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