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тАО05-06-2009 06:54 AM
тАО05-06-2009 06:54 AM
What should be the value of nfile parameter if I have 40 GB of physical memory in my system ?
Thanks in advance
Titu
Solved! Go to Solution.
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тАО05-06-2009 07:00 AM
тАО05-06-2009 07:00 AM
SolutionHope this helps
UNIX because I majored in cryptology...
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тАО05-06-2009 07:07 AM
тАО05-06-2009 07:07 AM
Re: nfile !
Pete
Pete
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тАО05-06-2009 07:11 AM
тАО05-06-2009 07:11 AM
Re: nfile !
nfile defines the maximum number of open files system wide. It also depends on the maxfiles_lim
see here for more details.
http://docs.hp.com/en/B3921-60631/nfile.5.html
Ganesh.
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тАО05-06-2009 10:43 AM
тАО05-06-2009 10:43 AM
Re: nfile !
Thanks in advance.
Titu.
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тАО05-06-2009 10:48 AM
тАО05-06-2009 10:48 AM
Re: nfile !
UNIX because I majored in cryptology...
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тАО05-06-2009 10:56 AM
тАО05-06-2009 10:56 AM
Re: nfile !
pls see the thread for more information.
http://forums11.itrc.hp.com/service/forums/questionanswer.do?threadId=982315
for more about tunable parameters
http://docs.hp.com/en/TKP-90202/index.html
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тАО05-06-2009 11:02 AM
тАО05-06-2009 11:02 AM
Re: nfile !
Titu
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тАО05-07-2009 02:44 AM
тАО05-07-2009 02:44 AM
Re: nfile !
I know my post will not win any points but it
does not matter.
I want to send this advisory so that
others do not get hurt if they run soft
upgrade from HP-UX 11.23 to 11.31 and
use nfile parameter.
Here is the scenario that happened to
a reputable government ogranisation:
a) They run Oracle database on HP-UX 11.23
servers (ServiceGuard clusters) and
set kernel parameter nfile to some value
(say, 30000).
b) They did a soft-upgrade to HP-UX 11.31
(as opposed to clean, fresh installation of
the new release) and started getting serious
problems with Oracle.
And here is why:
On HP-UX 11.31 nfile is a private parameter.
It is not supposed to be tuned anymore.
Hence, the best value for nfile on HP-UX 11.31 is 0 (auto-tune).
Since the upgrade kept nfile at 30000,
Oracle was somehow needing more and
crashing regularly.
A little trick how you can find out the
private kernel parameters on HP-UX 11.31:
a) If the private parameter holds a
non-default value, simply run:
# print_manifest
This command will list ALL kernel
parameters that have non-default values,
including the private parameters.
b) If you know the name of the parameter,
you can check it directly:
# kctune nfile
But, this will fail:
# kctune | grep nfile
Go figure :) Interesting and useful.
So, the private kernel parameters are hidden
partially but not completely...
Cheers,
VK2COT