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Christoph Pleger | 9 Jan 2009 11:48
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NFS with Kerberos

Hello,

I have two questions about NFS with Kerberos authentication.

First, how can a user execute a cron job or an at job? The user is not
authenticated at the time when the job must be executed, so how can he
be authenticated and how can he access his home directory?

Second, how can NFS with Kerberos and SSH authorized_keys be combined?
The user has to be authenticated (so must enter a password) for
authorized_keys to be read, but the purpose of authorized_keys is
obviously to login without a password.

Regards
  Christoph

 
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Pol | 11 Jan 2009 20:29
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monitoring swap i/o


I would like to be able to exactly monitor programs i/o in the swap
area; 'top' does not seem to be the right tool as processes are sorted
according to the total amount of swap space used, while i would like
processes with high i/o activity (albeit in small amounts) to be
highlighted. 

My case is with firefox and konqueror. They stay silently for hours, then
i/o starts, as one can hear that typical noise from the disk and as it can
be checked with 'vmstat'.  
Also i would like to locate programs more precisely, to tell which browser
tab, which plugin has triggered that swapping.  

Any hints?

Thank you

--
Pol 

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Ron Herbert | 13 Jan 2009 10:05
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Re: monitoring swap i/o

looks on "sar" you can report statistics for a given process (or from
the system)

Firefox: i think firefox is a monolith a tab isn't a childprozess (may
be you find a addone, that say you more about firefox)

fridy

2009/1/11, Pol <linux_milano <at> yahoo.it>:
>
> I would like to be able to exactly monitor programs i/o in the swap
> area; 'top' does not seem to be the right tool as processes are sorted
> according to the total amount of swap space used, while i would like
> processes with high i/o activity (albeit in small amounts) to be
> highlighted.
>
> My case is with firefox and konqueror. They stay silently for hours, then
> i/o starts, as one can hear that typical noise from the disk and as it can
> be checked with 'vmstat'.
> Also i would like to locate programs more precisely, to tell which browser
> tab, which plugin has triggered that swapping.
>
> Any hints?
>
> Thank you
>
> --
> Pol
>
> --
(Continue reading)

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Adrian Calinescu | 13 Jan 2009 11:00

Re: monitoring swap i/o

Hello,

> Firefox: i think firefox is a monolith a tab isn't a childprozess (may
> be you find a addone, that say you more about firefox)

You are right, the only browser I know of that runs every tab as a separate 
process is Chrome.

--Adrian.

--------------------------------------------------
From: "Ron Herbert" <1.fridy <at> gmail.com>
Sent: Tuesday, January 13, 2009 11:05 AM
To: <linux_milano <at> yahoo.it>
Cc: <linux-admin <at> vger.kernel.org>
Subject: Re: monitoring swap i/o

> looks on "sar" you can report statistics for a given process (or from
> the system)
>
> Firefox: i think firefox is a monolith a tab isn't a childprozess (may
> be you find a addone, that say you more about firefox)
>
>
> fridy
>
> 2009/1/11, Pol <linux_milano <at> yahoo.it>:
>>
>> I would like to be able to exactly monitor programs i/o in the swap
>> area; 'top' does not seem to be the right tool as processes are sorted
(Continue reading)

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Chamith Kumarage | 15 Jan 2009 10:11
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Re: monitoring swap i/o

+1 for "sar"...another option would be to use "iostat"..

Running "iostat" with a "tail -f" might be what you are looking for..

~Chamith

On Tue, 2009-01-13 at 10:05 +0100, Ron Herbert wrote:
> looks on "sar" you can report statistics for a given process (or from
> the system)
> 
> Firefox: i think firefox is a monolith a tab isn't a childprozess (may
> be you find a addone, that say you more about firefox)
> 
> 
> fridy
> 
> 2009/1/11, Pol <linux_milano <at> yahoo.it>:
> >
> > I would like to be able to exactly monitor programs i/o in the swap
> > area; 'top' does not seem to be the right tool as processes are sorted
> > according to the total amount of swap space used, while i would like
> > processes with high i/o activity (albeit in small amounts) to be
> > highlighted.
> >
> > My case is with firefox and konqueror. They stay silently for hours, then
> > i/o starts, as one can hear that typical noise from the disk and as it can
> > be checked with 'vmstat'.
> > Also i would like to locate programs more precisely, to tell which browser
> > tab, which plugin has triggered that swapping.
> >
(Continue reading)

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