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тАО07-30-2003 02:31 AM
тАО07-30-2003 02:31 AM
Load rises to 50 on Redhat 7.2
We recently got 5 new Proliant DL380 running RedHat 7.2 for a Project. All Machines were cloned from one Installation. On of them were having some Problems with the Load. The Load suddenly, withyout anybody working on the Machine rises from 0.1 to 50. Only thing we can do then is power cycle the thing. In some cases tough it seems the Load begins to rise when the Omniback(4.1) Backup starts. I tried to kill the VBDA's when the Load gets to 3+ but it doesnt to any good. Does anyone have a Suggestion where the Problem could be located ? RedHat told us to turn of the APM but this didnt help.
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тАО07-30-2003 05:36 AM
тАО07-30-2003 05:36 AM
Re: Load rises to 50 on Redhat 7.2
I'm attaching a script that might help you kill bad processes en mass.
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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тАО07-30-2003 05:44 AM
тАО07-30-2003 05:44 AM
Re: Load rises to 50 on Redhat 7.2
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тАО07-30-2003 10:06 PM
тАО07-30-2003 10:06 PM
Re: Load rises to 50 on Redhat 7.2
Versions prior to 2.4.18 as relased by RedHat with 7.2 have issues with IO caching going out of control and taking down the machine(the VM gets confused between caching and freeing memory until 80% of kernel time is spent in the VM calls alone).
Either look for the RiekVanRiel patch and apply it over the vanilla kernel sources (or RedHat's but I'm not sure if it appies nicely over the ac patch) or look for a 2.4.18(+) RedHat kernel.
Hope this helps,
Cristi
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тАО07-30-2003 10:10 PM
тАО07-30-2003 10:10 PM
Re: Load rises to 50 on Redhat 7.2
A userspace process keeps turning the deadman's counter back to X. If the userspace process can't set it back it means the machine load is too big for a simple operation to execute and the deadman will reboot it.
Cheers,
Cristi
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тАО07-31-2003 04:53 AM
тАО07-31-2003 04:53 AM
Re: Load rises to 50 on Redhat 7.2
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тАО07-31-2003 10:12 AM
тАО07-31-2003 10:12 AM
Re: Load rises to 50 on Redhat 7.2
Some things I noticed:
1. Swap is 0% used. That seems odd to me, Althought linux does not agressivly use swap, zero usage is abnormal IMHO
2. rpc is running lots.
do you use rpc? What do you use it for. One strategy for good system administration is: "Don't install stuff you don't need". If you don't need deamons remove them. One strategy for Troubleshooting is "Make the system simpler and simpler by removing components until either the problem goes away or you are left with a single faulty component."
Hmm that was a bit of a mouthful.
Just because none is logged in doesn't mean it's not a process. What services does the machine provide? Is it a web server? NFS server? NFS client? DB server? Mail server?
What does netstat look like?
A hunch is that some nfs proc is locked in a run state.
Give us more ... we're getting there.
On a side note I have pegged a RH 7.3 server to load of 290 and been able to recover. I have to say that compared to RH 6.2 , RH 7.3 is a grand improvement. I am anxious to break stuff with 7.3 then fix them with 9.0.
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тАО08-01-2003 12:18 AM
тАО08-01-2003 12:18 AM
Re: Load rises to 50 on Redhat 7.2
anyway, hp released new versions of the linux ito agents a few weeks ago, one of the entries in the patch documentation was that 'the control agent slowly consumes all available memory'. perhaps updating your agent could be the solution to your problem?