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[mathcad] Re: Memory problems
| [mathcad] Re: Memory problems |
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Author: Mark Starnes
Posted: Tue, 18 Apr 2006 10:29:09 +0100
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Dave, I would be wary of terminating MathCad early. I observed the
same behaviour and found that on occasion, early termination of MathCad
resulted in file corruption. I tended to be saving a large file and
then exiting immediately - MathCad would linger in taskmanager for
minutes afterwards but would leave eventually.<br>
<br>
Regards,<br>
<br>
Mark Starnes.<br>
<br>
Snelling, Dave wrote:
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<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;" lang="EN-CA">Occasionally
Mathcad 13, running under XP pro sp 2,
reports “out of memory” so I began paying attention to the memory
available. I found that even after Mathcad was closed that task
manager
showed the process mathcad.exe running, and I had to close the process
manually. On one occasion I noted Mathcad was using 396 MB with one
Mathcad sheet open. I closed Mathcad and task manager showed
mathcad.exe
running using 357 MB. I terminated the process, opened Mathcad and the
single sheet I had been using, and Mathcad was now using 94 MB.<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;" lang="EN-CA">Has anyone
else noted similar problems?<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;" lang="EN-CA">Dave Snelling<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;" lang="EN-CA"><o:p> </o:p></span></font></p>
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<p style="text-align: center;" align="center"><b><font
face="Comic Sans MS" size="2"><span
style="font-size: 10pt; font-family: "Comic Sans MS"; font-weight: bold;">Dr
David R. Snelling</span></font></b><font face="Comic Sans MS" size="2"><span
style="font-size: 10pt; font-family: "Comic Sans MS";"><br>
Principal Research Officer<br>
NRC/ICPET/Combustion Research<br>
Building M9, <st1:Street w:st="on"><st1:address w:st="on">1200
Montreal Rd.</st1:address></st1:Street> <br>
<st1:place w:st="on"><st1:City w:st="on">Ottawa</st1:City>, <st1:State
w:st="on">ON</st1:State>, <st1:country-region w:st="on">Canada</st1:country-region></st1:place>
K1A OR6<br>
<b><span style="font-weight: bold;">Phone (613) 993-0810</span></b><br>
Fax (613) 957-7869<br>
<font color="blue"><span style="color: blue;"><a
href= "mailto:dave.snelling"
color="black"><span style="color: black;"> </span></font></a></span></font><br>
<font color="#333399"><span
style="color: rgb(51, 51, 153);"><a href="http://www.nrc.ca/"><b><font
color="#333399"><span
style="color: rgb(51, 51, 153); font-weight: bold;">www.nrc.ca</span></font></b></a></span></font><b><span
style="font-weight: bold;"><o:p></o:p></span></b></span></font></p>
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| [mathcad] Re: Memory problems |
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Author: Mike Austin
Posted: Tue, 18 Apr 2006 10:35:59 +0100
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"Snelling, Dave" "Dave.Snelling" writes
>I found
>that even after Mathcad was closed that task manager showed the process
>mathcad.exe running, and I had to close the process manually.
>
>Has anyone else noted similar problems?
Yes, I have seen this sometimes. I think it is a documented bug. I hear
Mathcad 13.1 will be out shortly. More entomological opportunities ;-)
--
Mike Austin
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| [mathcad] Re: Memory problems |
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Author: Aldo P Solari
Posted: Tue, 18 Apr 2006 11:51:49 +0100
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Dave, it is a Windows (memory management) problem. Use
CleverCachePro.
W/best wishes,
Aldo P. Solari (fisheries biologist)
"asolari" (academic matters)
"aldo.p.solari" (private matters)
Home: www.ulpgc.es/webs/ffresearch-solaris
(U. of) Las Palmas, Canary Islands [18/04/2006, 11:51 GMT]
Original message:
"Dave.Snelling" wrote [16/04/2006, 17:00]:
SD> Occasionally Mathcad 13, running under XP pro sp 2, reports "out
SD> of memory" so I began paying attention to the memory available. I
SD> found that even after Mathcad was closed that task manager showed
SD> the process mathcad.exe running, and I had to close the process
SD> manually. On one occasion I noted Mathcad was using 396 MB with
SD> one Mathcad sheet open. I closed Mathcad and task manager showed
SD> mathcad.exe running using 357 MB. I terminated the process,
SD> opened Mathcad and the single sheet I had been using, and Mathcad
SD> was now using 94 MB.
SD> Has anyone else noted similar problems?
SD> Dave Snelling
SD> Dr David R. Snelling
SD> Principal Research Officer
SD> NRC/ICPET/Combustion Research
SD> Building M9, 1200 Montreal Rd.
SD> Ottawa, ON, Canada K1A OR6
SD> Phone (613) 993-0810
SD> Fax (613) 957-7869
SD> "dave.snelling"
SD> www.nrc.ca <http://www.nrc.ca/>
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| [mathcad] Re: Memory problems |
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Author: AUSTIN, Mike
Posted: Tue, 18 Apr 2006 12:04:36 +0100
|
Aldo, are you sure about this? I have not experienced this with other programs, nor with Mathcad 11 and earlier. However, on much earlier versions of Mathcad, I found that memory was gradually eaten up by Mathcad and never released. I am a little suspicious that there could be memory leaks associated with Mathcad that appear in different forms with each version. At the moment, it doesn't seem to be too serious because I have enough RAM to park a car in.
STRESSWORK
Mike AUSTIN
on behalf of AIRBUS-UK
for Department - ESASU
NTC D2 09J
Phone: +44 (0)117 936 2688
Fax: +44 (0)117 936 5474
Mailto: "Mike.Austin"
From: Aldo P. Solari "mailto:aldo.p.solari"
Sent: 18 April 2006 11:52
To: Mathcad Discussion List
Subject: [mathcad] Re: Memory problems
Dave, it is a Windows (memory management) problem. Use
CleverCachePro.
W/best wishes,
Aldo P. Solari (fisheries biologist)
This mail has originated outside your organization, either from an external partner or the Global Internet. Keep this in mind if you answer this message.
|
| [mathcad] Re: Memory problems |
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Author: Aldo P Solari
Posted: Tue, 18 Apr 2006 12:43:55 +0100
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Mike, it is the memory management of the operative system the part
which releases memory. One of the bad problems with Windows is that
once you close an application, it never gains back the full memory
"block". This is a well known Win problem since ... 2000 years ago :P
If you start up & close down applications 10 or 20 times/day, you may
end up with memory gaps of up to 500 Mb (out of 1 Gb RAM). To avoid
this, I use CleverCachePro which is a memory management program that
solves all of these shortcomings. Also, it makes up a (dynamic or
fixed) cache out of part of the RAM where it loads applications which
you load up frequently - making the system faster.
I dont even get craches during "blow_up_the_box_simulations" - a
"Marine kind of field testing" I do sometimes to see if the box will
do the job. Without a good memory management, the box will crash.
Another problem could be that you have some tiny program loaded into
RAM which doesnt respect the memory addressing and will crash your
system.
Cheers!
W/best wishes,
Aldo P. Solari (fisheries biologist)
"asolari" (academic matters)
"aldo.p.solari" (private matters)
Home: www.ulpgc.es/webs/ffresearch-solaris
(U. of) Las Palmas, Canary Islands [18/04/2006, 12:30 GMT]
Original message:
"Mike.Austin" wrote [18/04/2006, 12:04]:
AM> Aldo, are you sure about this? I have not experienced this with
AM> other programs, nor with Mathcad 11 and earlier. However, on much
AM> earlier versions of Mathcad, I found that memory was gradually
AM> eaten up by Mathcad and never released. I am a little suspicious
AM> that there could be memory leaks associated with Mathcad that
AM> appear in different forms with each version. At the moment, it
AM> doesn't seem to be too serious because I have enough RAM to park
AM> a car in.
AM> STRESSWORK
AM> Mike AUSTIN
AM> on behalf of AIRBUS-UK
AM> for Department - ESASU
AM> NTC D2 09J
AM> Phone: +44 (0)117 936 2688
AM> Fax: +44 (0)117 936 5474
AM> Mailto: "Mike.Austin"
AM> From: Aldo P. Solari "mailto:aldo.p.solari"
AM> Sent: 18 April 2006 11:52
AM> To: Mathcad Discussion List
AM> Subject: [mathcad] Re: Memory problems
AM> Dave, it is a Windows (memory management) problem. Use
AM> CleverCachePro.
AM> W/best wishes,
AM> Aldo P. Solari (fisheries biologist)
AM> This mail has originated outside your organization, either
AM> from an external partner or the Global Internet. Keep this in
AM> mind if you answer this message.
AM> Contributions: "mathcad"
AM> Hosted by: Adept Scientific http://www.adeptscience.com
AM> List Archive: http://lists.adeptscience.co.uk/
AM> Would you like this to come to a different email address?
AM> Simply leave the mailing list (see below) and re-join by
AM> sending a blank email from the new address to:
AM> "mailto:join-mathcad" or
AM> If you do not want to be on the Mathcad list, simply send a
AM> blank email (no subject or message needed) to:
AM> "leave-mathcad-87206D"
|
| [mathcad] RE: Memory problems |
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Author: Pergande, Albert N
Posted: Tue, 18 Apr 2006 14:20:39 -0400
|
There is a serious memory leak when doing animation. Every frame leaves
a sheet's worth of memory allocated, and only closing MathCAD and
waiting a few minutes will ring it back. I reported this with examples
last beta.
Al Pergande
Senior Radar Engineer
Lockheed Martin Missiles and Fire Control
MP 200
5600 Sandlake Road
Orlando, Fl 32819
Voice 407-356-5169
Fax 407-356-0933
"albert.n.pergande"
for personal mail - "al"
_____
From: Snelling, Dave "mailto:Dave.Snelling"
Sent: Sunday, April 16, 2006 12:01 PM
To: Mathcad Discussion List
Subject: [mathcad] Memory problems
Occasionally Mathcad 13, running under XP pro sp 2, reports "out of
memory" so I began paying attention to the memory available. I found
that even after Mathcad was closed that task manager showed the process
mathcad.exe running, and I had to close the process manually. On one
occasion I noted Mathcad was using 396 MB with one Mathcad sheet open.
I closed Mathcad and task manager showed mathcad.exe running using 357
MB. I terminated the process, opened Mathcad and the single sheet I had
been using, and Mathcad was now using 94 MB.
Has anyone else noted similar problems?
Dave Snelling
Dr David R. Snelling
Principal Research Officer
NRC/ICPET/Combustion Research
Building M9, 1200 Montreal Rd.
Ottawa, ON, Canada K1A OR6
Phone (613) 993-0810
Fax (613) 957-7869
"dave.snelling"
www.nrc.ca <http://www.nrc.ca/>
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Attachments:
image001.gif
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| [mathcad] RE: Memory problems |
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Author: Neil Harris
Posted: Wed, 19 Apr 2006 09:29:52 +0100
|
Mathcad leaves behind program fragments after symbolic processing too -
mathcad.exe + an oddly named ~e5d141.tmp.
Mathsoft seem as dismissive of their customers as Microsoft! Maybe they
should concentrated on fixing bugs instead of adding features.
Dr. Neil Harris
Chief Scientist, NXT.
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