- Community Home
- >
- Servers and Operating Systems
- >
- Operating Systems
- >
- Operating System - HP-UX
- >
- Sybase Perfomance Problems
Operating System - HP-UX
1753774
Members
6875
Online
108799
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
тАО08-13-2003 12:57 PM
тАО08-13-2003 12:57 PM
Sybase Perfomance Problems
We are seeing a very high number of system calls from our Sybase 11.9.2 servers on HPUX 11.0. We do not appear to have the same issue on 11.0.3. During peak times we are seeing over 200,00 select calls per second per dataserver process! Has anyone seen anything like this?
2 REPLIES 2
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО08-13-2003 02:26 PM
тАО08-13-2003 02:26 PM
Re: Sybase Perfomance Problems
Hi Jeff,
That is a lot of syscalls, however this will depend on the amount of CPUs you have, please let me know. What you are refering to is a known problem with select called a "thundering herd" syndrome - the syscall will "poll" file descriptors waiting for an event to happen. When this occurs all selects waiting will be awakened - hence causing very poor performance. The code has been drastically changed on 11i and I haven't seen any issues with it on that or any of its subsequent releases (they all use the same code base after all). See the following link on the parameter to check and further analysis:
http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0x4b8f3f9a15add711abdc0090277a778c,00.html
Cheers,
James.
That is a lot of syscalls, however this will depend on the amount of CPUs you have, please let me know. What you are refering to is a known problem with select called a "thundering herd" syndrome - the syscall will "poll" file descriptors waiting for an event to happen. When this occurs all selects waiting will be awakened - hence causing very poor performance. The code has been drastically changed on 11i and I haven't seen any issues with it on that or any of its subsequent releases (they all use the same code base after all). See the following link on the parameter to check and further analysis:
http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0x4b8f3f9a15add711abdc0090277a778c,00.html
Cheers,
James.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО08-14-2003 05:06 AM
тАО08-14-2003 05:06 AM
Re: Sybase Perfomance Problems
We currently have 6 CPU's and about 30 sybase servers running, which I know is not the best setup.
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