#x27;ll have to try them to see for
myself.
Regards,
tzahi.
> -Original Message-
> From: guy keren [mailto:[EMAIL PROTECTED]
> Sent: Thursday, January 13, 2005 11:37 PM
> To: Tzahi Fadida
> Cc: 'Muli Ben-Yehuda'; linux-il@cs.huji.ac.il
> Subj
On Thu, 13 Jan 2005, Tzahi Fadida wrote:
> I am implementing a new sql operator algorithm called full-disjunction.
> I need to experiment with different environment conditions for
> it and different cost considerations.
> I can estimate the io cost by counting the operations of reading
> and writ
> Subject: Re: Getting io statistics on processes.
>
>
> On Thu, Jan 13, 2005 at 01:37:16AM +0200, Tzahi Fadida wrote:
>
> > maybe I should just disable the background writer and disable read
> > aheads. since I am working on a database, its doing its own caching.
&g
On Thu, Jan 13, 2005 at 01:37:16AM +0200, Tzahi Fadida wrote:
> maybe I should just disable the background writer and disable read
> aheads.
> since I am working on a database, its doing its own caching.
> can it be done?
Possibly via some combinatino of O_DIRECT and O_SYNC.
I think at this poi
005 12:18 AM
> To: guy keren
> Cc: Tzahi Fadida; linux-il@cs.huji.ac.il
> Subject: Re: Getting io statistics on processes.
>
>
> On Thu, Jan 13, 2005 at 12:29:01AM +0200, guy keren wrote:
>
> > in fact, it's very hard to achieve a proper "which process
> c
On Thu, Jan 13, 2005 at 12:29:01AM +0200, guy keren wrote:
> in fact, it's very hard to achieve a proper "which process caused this
> I/O" log. consider the case where two processes wrote to the same position
> in a file - there's likely to be only one disk write operation - which of
> the two pro
On Wed, 12 Jan 2005, Muli Ben-Yehuda wrote:
> > Well, it seems right. I am not sure if its all the io disk calls though.
> > The code is not easy to read but it seems this is the same data
> > that /proc/stat -> page line uses thru kstat.pgpgout.
> > I am looking at what seems to be the point whe
On Wed, Jan 12, 2005 at 02:43:20PM +0200, Tzahi Fadida wrote:
> Lets see if I understand, a dirtied buffer is not a regular
> file read/write related but only a buffer I allocated in a process
> using malloc, etc... that was changed and needed to be
> returned to the vm swap file.
Nope. Short exp
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Muli Ben-Yehuda
> Sent: Wednesday, January 12, 2005 11:57 AM
> To: Tzahi Fadida
> Cc: linux-il@cs.huji.ac.il
> Subject: Re: Getting io statistics on processes.
>
>
>
On Wed, Jan 12, 2005 at 02:39:03AM +0200, Tzahi Fadida wrote:
> Well, it seems right. I am not sure if its all the io disk calls though.
> The code is not easy to read but it seems this is the same data
> that /proc/stat -> page line uses thru kstat.pgpgout.
> I am looking at what seems to be the
inal Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Muli Ben-Yehuda
> Sent: Tuesday, January 11, 2005 10:19 AM
> To: Tzahi Fadida
> Cc: linux-il@cs.huji.ac.il
> Subject: Re: Getting io statistics on processes.
>
>
> On Tue, J
On Tue, Jan 11, 2005 at 10:10:41AM +0200, Tzahi Fadida wrote:
> > > I am looking for a utility that does that and especially
> > > a c library since I am in control of that process internal
> > > programming.
> >
> > This is information that has to be exported from the kernel.
> > I think tha l
> -Original Message-
> From: Muli Ben-Yehuda [mailto:[EMAIL PROTECTED]
> Sent: Tuesday, January 11, 2005 8:40 AM
> On Tue, Jan 11, 2005 at 12:26:52AM +0200, Tzahi Fadida wrote:
>
> > I am looking for io statistics per process in Linux.
> > I need to count the number of read/write blocks
On Tue, Jan 11, 2005 at 12:26:52AM +0200, Tzahi Fadida wrote:
> I am looking for io statistics per process in Linux.
> I need to count the number of read/write blocks from the
> magnetic disk a process performs.
Are you ignoring the caches here?
> I am looking for a utility that does that and e
Hello all,
I am currently programming a database operator algorithm and
i need to experiment with different kinds of settings for it.
I am looking for io statistics per process in Linux.
I need to count the number of read/write blocks from the
magnetic disk a process performs.
I am looking for a ut
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