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What is system resource impact of multiple open Outlook windows?

Posted on 2004-08-06
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Last Modified: 2010-04-08
I sometimes find it handy to have multiple instances of Outlook open so that I can see my Inbox, Todo's, and Notes at the same time without having to navigate back and forth several times.  When I open additional instances of Outlook after the first, the impact on system resources as shown in Task Manager seems almost negligible.  But it's hard for me to believe that it's not having a significant impact somewhere.  What resources, if any, are being taxed or consumed by this scenario?
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Question by:jaytucker1
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by:dis1931
ID: 11736849
I would tend to agree with your Task Manager.  I will not overly exert memory as Outlook is already loaded.  Processor wise you can only do so much in Outlook and you will only use one at a time and then switch to another.  The Hard Drive will not have any effect at all unless you are accessing a pst file that is local or a personal folder but that will not increase with two instances.  I think it is safe to say that you are safe...
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by:jaytucker1
ID: 11736948
Thanks dis1931:  
I don't really question what I'm seeing in Task Manager.  I believe it's accurate.  I'm wondering about OS resources that aren't being displayed in Task Mgr, and how those are being affected.  There may be tools out there that would display this info, but I'm not aware.
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by:dis1931
ID: 11737540
What kind of OS resources do you mean?  The OS manages memory and other access to hardware and if they are not affected then neither are OS resources.  The OS slows down and is affected when it has to write/read to hard drive or memory or using a page file or transferring data over the network...multiple Outlook windows doesn't affect any of these things and doesn't affect OS system resources other than the slight jump when you open it.  It is like saying that opening a new message in Outlook might take up too many resources.  It really doesn't only slightly probably not enough to even track.  You can get more detailed resource viewers such as:

http://www.sysinternals.com/ntw2k/freeware/procexp.shtml

that same website has a few other tools you might find interesting as well if you are tracking resources or what files are being changed, etc...
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dis1931 earned 125 total points
ID: 11755228
Did you check out that process explorer link?  If you right click Outlook.exe and click properties, it will show you kernel time as well as user time and bytes read, etc...or using dependency walker shows you all the dll files that it uses and it needs.....maybe this will help you more.
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by:jaytucker1
ID: 11755611
dis1931,
I had never right clicked on a process to see what I could monitor on a single process.  I'll use this to get some idea of what I gain by closing a few Outlook windows vs. closing an application.

Thanks for your help.
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