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Just 2 comments:
1. Microsoft recommended in the past a pagefile 1.5 times
the RAM size.
2. it is not the resizing of the page file that is the drag
on performance, it is the resulting defragmented pagefile
which is the drag.
Joseph Biran
____________________________________________
-----Original Message-----
From: amibroker@xxxxxxxxxxxxxxx
[mailto:amibroker@xxxxxxxxxxxxxxx] On Behalf Of Yuki Taga
Sent: Friday, December 23, 2005 1:51 AM
To: J. Biran
Subject: Re: [amibroker] OUT of MEMORY code
Hi J.,
I agree with you. My understanding is that this was a long
ago
calculation based on something like, "If you need that much
RAM, (and
it was so expensive, and most motherboards could not even
handle that
much), you needed a pagefile 3 or 4 times as large as your
amount of
RAM." My understanding is that now that is simply a legend
that will
not die.
Now of course, motherboards can handle GBs of affordable
RAM, and
many people need very small pagefiles. I have found two
things about
this: 1) any pagefile on the system drive is a drag on
performance.
Put it elsewhere, if at all possible. 2) Set the pagefile
to a
reasonable size based on observed maximum over time, and set
it to a
fixed minimum and maximum, which are the same. This stops
Windows
from resizing the darn thing when it doesn't need to, which
is also a
drag on performance.
My understanding, anyway.
Yuki
Friday, December 23, 2005, 4:36:38 PM, you wrote:
JB> I have seen some articles claiming that for large amount
of
JB> RAM page file should not be increased.
JB> (with very large RAM size you do not need to use any
page
JB> file at all). Excessive page file actually
JB> has a negative effect on performance (searching vast
size of
JB> empty file takes longer).
JB> There is a tiny freeware utility called XP Page File
Monitor
JB> ( XP_PageFileMon.zip circa 2003)
JB> that you should be able to find, it runs as a shut down
JB> script.
JB> Once installed, it monitors your actual usage of page
file
JB> and writes it to file on all windows shut downs.
JB> You will be surprised at the results.
JB> I have 2GB RAM and set the page file to 2GB which is
about 4
JB> times the maximum I ever saw during
JB> 2 months of monitoring.
JB> Joseph Biran
JB> ____________________________________________
JB> _____
JB> From: amibroker@xxxxxxxxxxxxxxx
JB> [mailto:amibroker@xxxxxxxxxxxxxxx] On Behalf Of
JB> dan_public@xxxxxxxxxxx
JB> Sent: Tuesday, December 20, 2005 6:53 PM
JB> To: amibroker@xxxxxxxxxxxxxxx
JB> Subject: RE: [amibroker] OUT of MEMORY code
JB> Yep, not your installed memory. I have 1.5Gb and AB
runs
JB> fine.
JB> Just a thought... Try turning Off the code switch and
then
JB> turning off HyperThreading (I think that's an option),
then
JB> turn off both.
JB> Also, have you checked your page file size? At 2Gb of
JB> memory, it should be set to about 3Gb.
JB> I can't think of anything else.
JB> Good luck,
JB> Dan.
JB> -------------- Original message --------------
JB> From: "Mark Keitel" <mkeitel@xxxxxxxxxxxxxxx>
JB> 2gb of memory, think it is like 533 speed, Hyper thread
JB> machine, plus I changed the Microsoft code switch to
allow
JB> 3gb of memory and page memory is maxed out too
JB> That is not the issue, has to do with settings inside
AB I
JB> would think
JB> Mark
JB>
<file:///C:\Documents%20and%20Settings\Owner\Application%20D
JB>
ata\Microsoft\Signatures\www.aajonahfish.com\astronomyhaven.
JB> htm>
JB> _____
JB> From: amibroker@xxxxxxxxxxxxxxx
JB> [mailto:amibroker@xxxxxxxxxxxxxxx] On Behalf Of
JB> dan_public@xxxxxxxxxxx
JB> Sent: Tuesday, December 20, 2005 7:52 PM
JB> To: amibroker@xxxxxxxxxxxxxxx
JB> Subject: Re: [amibroker] OUT of MEMORY code
JB> Mark,
JB> AB and eSignal are memory "intensive". With EOD data
JB> (i.e., no live datafeed), I've had AB use more than 1/2
Gb
JB> of memory after an exploration.
JB> How much memory does your system have? If less than
1Gb,
JB> consider upgrading.
JB> Regards,
JB> Dan.
JB> -------------- Original message --------------
JB> From: "aajohnah" <aajohnah@xxxxxxxxxxxxxxx>
JB> I am trying to run an explore on my whole data base now
and
JB> am getting an out of memory though it says
JB> E-signal out of memory and AB is locked up
JB> Any suggestion?
JB> Thank you
JB> Mark
JB>
<file:///C:\Documents%20and%20Settings\Owner\Application%20D
JB>
ata\Microsoft\Signatures\www.aajonahfish.com\astronomyhaven.
JB> htm>
JB> Please note that this group is for discussion between
users
JB> only.
JB> To get support from AmiBroker please send an e-mail
directly
JB> to
JB> SUPPORT {at} amibroker.com
JB> For other support material please check also:
JB> http://www.amibroker.com/support.html
JB> _____
JB> YAHOO! GROUPS LINKS
JB> * Visit your group "amibroker
JB> <http://groups.yahoo.com/group/amibroker> " on the web.
JB> * To unsubscribe from this group, send an email to:
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JB>
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JB> <http://docs.yahoo.com/info/terms/> Terms of Service.
JB> _____
Best,
Yuki
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For other support material please check also:
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To get support from AmiBroker please send an e-mail directly to
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