Look through the hdparm variables and see if your drive(s) are in some stupid/slow mode. <br><br><div class="gmail_quote">On Thu, May 6, 2010 at 11:18 AM, John G. Heim <span dir="ltr"><<a href="mailto:jheim@math.wisc.edu">jheim@math.wisc.edu</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Well, I guess the *real* question is why is the system so loaded? I believe<br>
its IO bound, based on my dd test, but I don't know why. Its running mysql<br>
with databases for horde3 and drupal. The slow query log is jammed with slow<br>
update messages. But the DB server has 16 Gb of RAM and the entire size of<br>
the mysql data all together is only 3 Gb.<br>
<br>
I have to figure something is wrong at the OS level because of the slow dd<br>
thing and because I just don't have that much actual data. I think mysql<br>
ought to be able to handle this load like a breeze. I don't think mysql is<br>
slowing down the server. I think it's already slow and mysql is slow because<br>
disk writes are so slow (for some reason).<br>
<br>
I think I'm going to move the mysql data to another machine temporarily and<br>
turn off mysql and then run my test. I'll bet it speeds up but I'll bet it<br>
doesn't blaze.<br>
<div class="im"><br>
----- Original Message -----<br>
From: "Greg Freemyer" <<a href="mailto:greg.freemyer@gmail.com">greg.freemyer@gmail.com</a>><br>
To: "Atlanta Linux Enthusiasts - Yes! We run Linux!" <<a href="mailto:ale@ale.org">ale@ale.org</a>><br>
</div><div class="im">Sent: Thursday, May 06, 2010 6:15 AM<br>
Subject: Re: [ale] why would it take longer to delete a file than to<br>
createit?<br>
<br>
<br>
</div><div><div></div><div class="h5">> Michael,<br>
><br>
> My phrasing was poor. I was trying to say what you said.<br>
><br>
> Greg<br>
><br>
><br>
> On 5/5/10, Michael Trausch <<a href="mailto:mike@trausch.us">mike@trausch.us</a>> wrote:<br>
>> I don't quite understand that. Would it not be faster to perform such<br>
>> actions on an idle system as opposed to a loaded one?<br>
>><br>
>> - mike<br>
>><br>
>> --<br>
>> Sent from my ADP1 running Android 2.1<br>
>><br>
>> On May 5, 2010 6:06 PM, "Greg Freemyer" <<a href="mailto:greg.freemyer@gmail.com">greg.freemyer@gmail.com</a>> wrote:<br>
>><br>
>> Is that on an idle disk/array?<br>
>><br>
>> That would be very slow.<br>
>><br>
>> But if its busy serving db queries, its not surprising.<br>
>><br>
>><br>
>> On Wed, May 5, 2010 at 4:45 PM, John G. Heim <<a href="mailto:jheim@math.wisc.edu">jheim@math.wisc.edu</a>> wrote:<br>
>>> Doh! Caching... I shoul...<br>
>> --<br>
>> Greg Freemyer<br>
>> Head of EDD Tape Extraction and Processing team<br>
>> Litigation Triage Solutions Specialist<br>
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>><br>
>> The Norcross Group<br>
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>><br>
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><br>
> --<br>
> Sent from my mobile device<br>
><br>
> Greg Freemyer<br>
> Head of EDD Tape Extraction and Processing team<br>
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> <a href="http://www.linkedin.com/in/gregfreemyer" target="_blank">http://www.linkedin.com/in/gregfreemyer</a><br>
> CNN/TruTV Aired Forensic Imaging Demo -<br>
><br>
> <a href="http://insession.blogs.cnn.com/2010/03/23/how-computer-evidence-gets-retrieved/" target="_blank">http://insession.blogs.cnn.com/2010/03/23/how-computer-evidence-gets-retrieved/</a><br>
><br>
> The Norcross Group<br>
> The Intersection of Evidence & Technology<br>
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</div></div></blockquote></div><br><br clear="all"><br>-- <br>-- <br>James P. Kinney III<br>Actively in pursuit of Life, Liberty and Happiness <br>Doing pretty well on all 3 pursuits <br><br>