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тАО11-15-2006 11:10 AM
тАО11-15-2006 11:10 AM
Upgrade to RHEL4 - Worse performance?
An example... A database is continuously rebuilt on the server. Previous to the upgrade, it averaged 8300 seconds from start to finish. Now, we're lucky to break 10,000 seconds. No hardware or filesystems were modified, just the upgrade on the root partition.
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тАО11-15-2006 05:06 PM
тАО11-15-2006 05:06 PM
Re: Upgrade to RHEL4 - Worse performance?
please give us more informations about your enviroment:
- how much CPUs, RAM is in you server?
- which database do you use?
- used RAID level? Hardware- or Software-RAID? How many disks?
- Is RHEL4 supportet with you database?
Regards,
Patrick
Patrick
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тАО11-15-2006 05:52 PM
тАО11-15-2006 05:52 PM
Re: Upgrade to RHEL4 - Worse performance?
The OS uses more memory so an impact on performance is likely. Also, any kernel or parameter tuning you did is gone. That work needs to be done over.
This could also be a problem with HP's drivers or the lack of them after the upgradee.
SEP
Owner of ISN Corporation
http://isnamerica.com
http://hpuxconsulting.com
Sponsor: http://hpux.ws
Twitter: http://twitter.com/hpuxlinux
Founder http://newdatacloud.com
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тАО11-15-2006 09:15 PM
тАО11-15-2006 09:15 PM
Re: Upgrade to RHEL4 - Worse performance?
No tuning or kernel performance tweaks were in place before.
It was literally just an upgrade of the OS and the PSP (the drivers are there), everything else stayed the same.
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тАО11-16-2006 06:49 PM
тАО11-16-2006 06:49 PM
Re: Upgrade to RHEL4 - Worse performance?
it could also be that some other (new) process is taking up a lot of precious CPU time, check with 'top' if there are some strange processes running.
lastly, if you're using X (with gnome/kde) you'll get a serious performance impact as well.