HPE GreenLake Administration
- Community Home
- >
- Servers and Operating Systems
- >
- Operating Systems
- >
- Operating System - HP-UX
- >
- which kernel parameter for user memory?
Operating System - HP-UX
1831061
Members
2514
Online
110019
Solutions
Forums
Categories
Company
Local Language
back
Forums
Discussions
Forums
- Data Protection and Retention
- Entry Storage Systems
- Legacy
- Midrange and Enterprise Storage
- Storage Networking
- HPE Nimble Storage
Discussions
Forums
Discussions
Discussions
Discussions
Forums
Discussions
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
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
09-05-2002 10:34 PM
09-05-2002 10:34 PM
which kernel parameter for user memory?
Hi,
Would appreciate if you guys could advise me which kernel parameter I can tune in my HP-UX v11.00 so as to reduce the amount of memory each user process is taking up. I have two similar HP-UX machines, but one is N-class, the other is L-class. They have the same applications running, but the N-class is serving much more users as compared to the L-class. From the Glance in my L-class, I noticed that the RSS for each user process is in mb, whereas it's in kb in my N-class machine. I can't tune the kernel in L-class to be exactly the same as the N-class because the N-class is used by much more users and has got more databases.
In a nutshell, I'll need to tune the kernel in my L-class so that each user process takes only a few hundreds kb reflected under the RSS column in the Glance
Thanks so much !
Regards,
Shirley
Would appreciate if you guys could advise me which kernel parameter I can tune in my HP-UX v11.00 so as to reduce the amount of memory each user process is taking up. I have two similar HP-UX machines, but one is N-class, the other is L-class. They have the same applications running, but the N-class is serving much more users as compared to the L-class. From the Glance in my L-class, I noticed that the RSS for each user process is in mb, whereas it's in kb in my N-class machine. I can't tune the kernel in L-class to be exactly the same as the N-class because the N-class is used by much more users and has got more databases.
In a nutshell, I'll need to tune the kernel in my L-class so that each user process takes only a few hundreds kb reflected under the RSS column in the Glance
Thanks so much !
Regards,
Shirley
3 REPLIES 3
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
09-05-2002 10:48 PM
09-05-2002 10:48 PM
Re: which kernel parameter for user memory?
Hi,
Setting dbc_max_pct to 20 % will increase the user memory space.
regards,
U.SivaKumar
Setting dbc_max_pct to 20 % will increase the user memory space.
regards,
U.SivaKumar
Innovations are made when conventions are broken
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
09-05-2002 11:04 PM
09-05-2002 11:04 PM
Re: which kernel parameter for user memory?
Hi, Shirley!
You are talking about the RSS, the resident set size of your processes. Usually the kernel determines the working set size of the processes which is the key factor for their RSS. You cannot easily restrict this directly from the OS side (unless you use things like 11.11 memory resource groups).
What you can change directly are things like maxdsiz/maxdsiz_64. But they do not restrict the RSS... here were talk about the vritual set size VSS.
Maybe you should have a look at the memory management white paper for more details. Not an easy stuff! :)
http://docs.hp.com/hpux/onlinedocs/os/11i/mem_mgt.html
Regards...
Dietmar.
You are talking about the RSS, the resident set size of your processes. Usually the kernel determines the working set size of the processes which is the key factor for their RSS. You cannot easily restrict this directly from the OS side (unless you use things like 11.11 memory resource groups).
What you can change directly are things like maxdsiz/maxdsiz_64. But they do not restrict the RSS... here were talk about the vritual set size VSS.
Maybe you should have a look at the memory management white paper for more details. Not an easy stuff! :)
http://docs.hp.com/hpux/onlinedocs/os/11i/mem_mgt.html
Regards...
Dietmar.
"Logic is the beginning of wisdom; not the end." -- Spock (Star Trek VI: The Undiscovered Country)
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
09-12-2002 07:34 AM
09-12-2002 07:34 AM
Re: which kernel parameter for user memory?
vps_pagesize is the most likely parameter to cause processes to have more RSS. The default value is "4", meaning that pages default to 4KB each, (4096 bytes). If the vps_pagesize value were very high then all pages would default to large sizes. A value of 1024 would make every page bring in 1MB of RSS. That would make "small" processes consume at least 3MB for one page each in its text, data, and stack regions.
While some programs get a big performance boost from large pages, it can be much more efficient to control that with "chatr +pd +pi" settings for particular programs instead of forcing all processes to use large pages.
While some programs get a big performance boost from large pages, it can be much more efficient to control that with "chatr +pd +pi" settings for particular programs instead of forcing all processes to use large pages.
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.
Company
Events and news
Customer resources
© Copyright 2025 Hewlett Packard Enterprise Development LP