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тАО12-21-2005 08:52 PM
тАО12-21-2005 08:52 PM
System Performance
Problem Detail: User is complaining for system performance, comparing HP Itanium performance with Itanium of IBM (P4, P5 series) using different commands of unix like cpio,ls,cp etc. After cpio command, System goes for processing & doesnot allow to work on other
session(s)even we can't give simple ls command.During this process system CPU & memory resources are on 100%. Also experiencing slow performance comparatively to IBM one for other tasks performed.Did Any body knows/face these kind of issue,please help.
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тАО12-21-2005 10:00 PM
тАО12-21-2005 10:00 PM
Re: System Performance
i have not direct experience on this kind of platform/os, but hanging around with google
i find this
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=120262
that talking about specific driver but then
redirect to
http://rhn.redhat.com/errata/RHBA-2004-550.html
where the solution step is , be carefully,
to update kernel.
In my opinion this can be a road to follow.
regards
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тАО12-22-2005 01:54 AM
тАО12-22-2005 01:54 AM
Re: System Performance
I recommend patching the system up fully and making sure the MSA1000 has firmware of 4.48 or above.
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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тАО12-22-2005 01:18 PM
тАО12-22-2005 01:18 PM
Re: System Performance
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тАО12-22-2005 08:01 PM
тАО12-22-2005 08:01 PM
Re: System Performance
These symptoms can also relate to some misconfigured kernel / file system parameters. Monitor these using iostat /vmstat and sar and then fine tune accordingly. Also a wrong code can cause the system to behave like this.
HTH,
Devender
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тАО12-23-2005 02:23 AM
тАО12-23-2005 02:23 AM
Re: System Performance
running into the exact same problem here on the exact same platforms. Here's what we've had to do:
run rhel4U2
update the QLA drivers to the HP versions
upgrade the QLA firmware
increase the queue lengths on the MSA to avoid contention
reduce the load drastically on the Brocade switch, or else run reverse hlpa directly between the 4640 and the MSA (not useful for most situations, FWIW).
You might also want to check the Hazard testing forums (hazard.boi.hp.com) for more information.