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тАО05-20-2009 06:47 AM
тАО05-20-2009 06:47 AM
Any clues on what would do this to a process?
Review of the syslog shows :
vmunix: Pid 6251 was killed due to failure in writing the User register stack- possible stack overflow.
What signal would the O/S (if it was the O/S) send the process?
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тАО05-20-2009 07:15 AM
тАО05-20-2009 07:15 AM
Re: Any clues on what would do this to a process?
What OS version ?
What process is causing this, DB, application ?
Since when is thi happening ?
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тАО05-20-2009 07:22 AM
тАО05-20-2009 07:22 AM
Re: Any clues on what would do this to a process?
Check the stack size in the kernel. If you have not changed it from the default size, consider increasing it if you think or you know that this process requires a large stack size. Otherwise the process has a bug or it was not meant to run on itanium based HP-UX.
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тАО05-20-2009 07:24 AM
тАО05-20-2009 07:24 AM
Re: Any clues on what would do this to a process?
Maybe the following thread will help.
http://forums13.itrc.hp.com/service/forums/questionanswer.do?admit=109447627+1242832524002+28353475&threadId=861749
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тАО05-20-2009 07:33 AM
тАО05-20-2009 07:33 AM
Re: Any clues on what would do this to a process?
This is a set of processes which make up a Database Environment (generally two or more processes will be killed as above).
ulimit shows stacksize as a huge 128Mb ... so doubt it is actual "stack" overflow.
Machine had been up for 100 days and "no changes".
Increase the kernel stack size?? What parameter is that?
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тАО05-20-2009 07:39 AM
тАО05-20-2009 07:39 AM
Re: Any clues on what would do this to a process?
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тАО05-20-2009 07:47 AM
тАО05-20-2009 07:47 AM
Re: Any clues on what would do this to a process?
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тАО05-20-2009 08:03 AM
тАО05-20-2009 08:03 AM
Re: Any clues on what would do this to a process?
ulimit is not the only possible cause.
maxdsiz
maxssiz
and their 64 bit mates can all be part of this issue.
It is likely you will need to reboot your system to make all the required kernel changes.
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тАО05-20-2009 08:35 AM
тАО05-20-2009 08:35 AM
Re: Any clues on what would do this to a process?
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тАО05-20-2009 11:02 PM
тАО05-20-2009 11:02 PM
Re: Any clues on what would do this to a process?
Perhaps you have infinite recursion so no matter how big you make it, you will always die. Make this smaller so you will die here first vs the RSE stack below.
It would be good to look at a stack trace from a core file.
Also, if you are on a thread stack, changing maxssiz or maxrsessiz won't help.
>Don: you should check maxrsessiz / maxrsessiz_64bit
I've only had to increase this to 16 Mb for one heavily recursive application.
Unfortunately you'll have to reboot to change this.