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Hello,
Windows Task Manager you say.
Do you know that WTM can display dozen of different "memory usage" figures
and most of them are misleading?
Windows works with Virtual memory. RAM is NOT allocated to process. Virtual memory is.
Then, on the fly, virtual memory pages are mapped to RAM and used, but one second later
the same RAM cells can be (re)used by different process and different virtual memory address.
So called "mem usage" in WTM is not total memory usage, but working set size.
http://technet.microsoft.com/en-us/library/cc938567.aspx
Total memory usage is shown as "private bytes" (aka "virtual memory size").
Also if you run 32 bit OS, it will allow only 2GB to be used for apps, regardless how much RAM you have
(or 3GB with /LARGEADDRESSAWARE and /3G boot ini switch)
Best regards,
Tomasz Janeczko
amibroker.com
----- Original Message -----
From: "reefbreak_sd" <reefbreak_sd@xxxxxxxxx>
To: <amibroker@xxxxxxxxxxxxxxx>
Sent: Tuesday, November 17, 2009 6:58 AM
Subject: [amibroker] Re: How much ram is being used.
> The details are different on various Windows versions, but press CTRL+ALT+DELETE and you will get windows task manager. Click on
> the Performance dropdown and you can see your memory usage as you run and exit various programs.
>
> Just for Example:
> I run Win Vista (hate it !) with 4gbytes of RAM. I run AB in real time mode with data from IQ Feed. One processor runs AB and
> the other processor runs IQ Feed data manager. Both CPU's are busy about 50% of the time and I'm using just over 2gbytes or RAM.
> There is no page file activity on the disk.
>
> ReefBreak
>
> --- In amibroker@xxxxxxxxxxxxxxx, "jmdeacon" <jmdeacon@xxx> wrote:
>>
>> I am considering buying a new computer and was wondering if there was a way to figure out how much Ram I am using. I am not a
>> programmer by profession and have self taught myself a fair amount, but sometimes my assumptions about computers etc are just
>> plain wrong, so let me no if my thinking is correct.
>>
>> I noticed when I run an optimization, the first pass will take about 3 minutes and then each subsequent step takes about 1
>> minute. I noticed a while ago that when I installed more ram, the first step time did not change as much as the additional step
>> times. I am assuming that the amount of ram is part of this. If the amount of ram is more than the amount of data loaded in to
>> be tested, then I will minimize the time for each additional step after the first pass.
>>
>> If I am correct of this, is there a way to find out how much ram that threshold is on my system?
>>
>> Thanks,
>>
>> John
>>
>
>
>
>
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