[ale] why would it take longer to delete a file than to createit?

[Jim Kinney]

Look through the hdparm variables and see if your drive(s) are in some
stupid/slow mode.

On Thu, May 6, 2010 at 11:18 AM, John G. Heim <jheim at math.wisc.edu> wrote:

> Well, I guess the *real* question is why is the system so loaded? I believe
> its IO bound, based on my dd test, but I don't know why. Its running mysql
> with databases for horde3 and drupal. The slow query log is jammed with
> slow
> update messages.  But the DB server has 16 Gb of RAM and the entire size of
> the mysql data all together is only 3 Gb.
>
> I have to figure something is wrong at the OS level because of the slow dd
> thing and because I just don't have that much actual data.  I think mysql
> ought to be able to handle this load like a breeze.  I don't think mysql is
> slowing down the server. I think it's already slow and mysql is slow
> because
> disk writes are so slow (for some reason).
>
> I think I'm going to move the mysql data to another machine temporarily and
> turn off mysql and then run my test. I'll bet it speeds up but I'll bet it
> doesn't blaze.
>
> ----- Original Message -----
> From: "Greg Freemyer" <greg.freemyer at gmail.com>
> To: "Atlanta Linux Enthusiasts - Yes! We run Linux!" <ale at ale.org>
> Sent: Thursday, May 06, 2010 6:15 AM
> Subject: Re: [ale] why would it take longer to delete a file than to
> createit?
>
>
> > Michael,
> >
> > My phrasing was poor.  I was trying to say what you said.
> >
> > Greg
> >
> >
> > On 5/5/10, Michael Trausch <mike at trausch.us> wrote:
> >> I don't quite understand that. Would it not be faster to perform such
> >> actions on an idle system as opposed to a loaded one?
> >>
> >>   - mike
> >>
> >> --
> >> Sent from my ADP1 running Android 2.1
> >>
> >> On May 5, 2010 6:06 PM, "Greg Freemyer" <greg.freemyer at gmail.com>
> wrote:
> >>
> >> Is that on an idle disk/array?
> >>
> >> That would be very slow.
> >>
> >> But if its busy serving db queries, its not surprising.
> >>
> >>
> >> On Wed, May 5, 2010 at 4:45 PM, John G. Heim <jheim at math.wisc.edu>
> wrote:
> >>> Doh! Caching... I shoul...
> >> --
> >> Greg Freemyer
> >> Head of EDD Tape Extraction and Processing team
> >> Litigation Triage Solutions Specialist
> >> http://www.linkedin.com/in/gregfreemyer
> >> CNN/TruTV Aired Forensic Imaging Demo -
> >>
> >>
> http://insession.blogs.cnn.com/2010/03/23/how-computer-evidence-gets-retrieved/
> >>
> >> The Norcross Group
> >> The Intersection of Evidence & Technology
> >> http://www.norcrossgroup.com
> >>
> >>
> >> _______________________________________________
> >> Ale mailing list
> >> Ale at ale.org
> >> http://mail.ale.org/ma...
> >>
> >
> > --
> > Sent from my mobile device
> >
> > Greg Freemyer
> > Head of EDD Tape Extraction and Processing team
> > Litigation Triage Solutions Specialist
> > http://www.linkedin.com/in/gregfreemyer
> > CNN/TruTV Aired Forensic Imaging Demo -
> >
> >
> http://insession.blogs.cnn.com/2010/03/23/how-computer-evidence-gets-retrieved/
> >
> > The Norcross Group
> > The Intersection of Evidence & Technology
> > http://www.norcrossgroup.com
> > _______________________________________________
> > Ale mailing list
> > Ale at ale.org
> > http://mail.ale.org/mailman/listinfo/ale
> > See JOBS, ANNOUNCE and SCHOOLS lists at
> > http://mail.ale.org/mailman/listinfo
> >
> >
>
> _______________________________________________
> Ale mailing list
> Ale at ale.org
> http://mail.ale.org/mailman/listinfo/ale
> See JOBS, ANNOUNCE and SCHOOLS lists at
> http://mail.ale.org/mailman/listinfo
>



-- 
-- 
James P. Kinney III
Actively in pursuit of Life, Liberty and Happiness
Doing pretty well on all 3 pursuits
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mail.ale.org/pipermail/ale/attachments/20100506/2ddcbfa2/attachment.html