- Community Home
- >
- Servers and Operating Systems
- >
- Operating Systems
- >
- Operating System - HP-UX
- >
- Confirming the impact of changing kernel parameter
Categories
Company
Local Language
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
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
Community
Resources
Forums
Blogs
- 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
тАО08-08-2007 10:11 PM
тАО08-08-2007 10:11 PM
We have a requirement that we need to modify the oracle database parameter called "processes" from the current value of 1000 to 5000. In order for this database parameter to take effect on the OS, we want to alter few of the kernel parameters. Effectively the database parameter allows 4000 more user processes in our server.
The configuration of our server is
HP-UX 11.23 ia64 (8 CPU, 64GB physical memory).
Oracle 10g rel2 software.
The current value of nproc is 4096 and we want to increase the value to 7168. Please confirm if it is fine to change the following kernel parameter.
kctune -s nproc =7168
kctune -s ksi_alloc_max = ((nproc*9)/10)
kctune -s ncsize = ((8*nproc+2048)+vx_ncsize)
kctune -s nfile = (15*nproc+2048)
kctune -s ninode = (8*nproc+2048)
kctune -s nkthread = (((nproc*7)/4)+16)
kctune -s semmnu = (nproc - 4)
An early response is much appreciated.
Thanks,
Srikanth A
Solved! Go to Solution.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО08-08-2007 10:22 PM
тАО08-08-2007 10:22 PM
Re: Confirming the impact of changing kernel parameter
The increase of value nproc is nothing much of concern. I would recommend you post the question to Oracle with the current kernel setting acceptable
11.23 the kernel tuning can be tuned dynamically (meaning without reboot)
WK.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО08-08-2007 10:28 PM
тАО08-08-2007 10:28 PM
Re: Confirming the impact of changing kernel parameter
if the kernel parameter is static means you must reboot the server after rebuilding the kernel.
before changing any kernel parameter, be sure that you have taken the back up of /stand/vmunix and /stand/system files.
Thanks and regards,
Vinu
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО08-08-2007 10:58 PM
тАО08-08-2007 10:58 PM
Re: Confirming the impact of changing kernel parameter
A reboot is required to activate this parameter.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО08-08-2007 11:48 PM
тАО08-08-2007 11:48 PM
Solution1.) First thing I do on systems these days is take out a lot of these forumulas. They are not realistic. Bill Hassell says so, so I do it.
2.) The only real way to test impact is to try the parametr change on a test system. That will at least insure that you don't blow up the system or prevent oracle from starting.
3.) I recommend setting the value much higher than the minimum so you don't have to do it again in a few months when use of the system increases.
4.) I believe that these changes are fine and will based on my experience not have a negative impact on your system.
SEP
Owner of ISN Corporation
http://isnamerica.com
http://hpuxconsulting.com
Sponsor: http://hpux.ws
Twitter: http://twitter.com/hpuxlinux
Founder http://newdatacloud.com
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО08-09-2007 12:36 AM
тАО08-09-2007 12:36 AM
Re: Confirming the impact of changing kernel parameter
Regards,
Srikanth