Memory on exch 2010 server keeps getting pegged

I have two servers in a DAG exch 2010 and both servers have 40GB assigned to them. The db's on this server is very large like around 1.2TB each and there is 3 of them.. I KNOW THIS IS TO BIG!!
They are in the process of moving emails to smaller DB's which is going to take a while but I was wondering if I need to through more memory at these servers for this memory issue to stop because it is causing the outside email to get backed up in the spam filter with the error, not enough resources...
Any suggestions?
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vmichAsked:
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Nick RhodeIT DirectorCommented:
Usually that error is associated with drive space running low.  If your memory is getting taxed out (open up task manager and check the performance monitor) then it would not hurt to add more.
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vmichAuthor Commented:
The disk space is fine and I did increase the memory up to 40GB about a month ago and it was fine until today. Just not sure how much to increase it to before I am adding to much memory to them..
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Nick RhodeIT DirectorCommented:
1.2Tb is quite a bit of mail.  The logs are getting purged after backups correct?
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vmichAuthor Commented:
Yes and it is HUGE...
That is why they are in the process of making the 3 larger db's smaller.
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AmitIT ArchitectCommented:
You need to use Exchange 2010 Calculator, what hardware you need for this server. Download the latest version, provide the inputs and decide accordingly. i have server running with above 128GB of RAM.
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Seth SimmonsSr. Systems AdministratorCommented:
i would definitely increase the memory or better divide your storage (as you are already working)
use the calculator as mentioned

http://blogs.technet.com/b/exchange/archive/2009/11/09/3408737.aspx)

with such huge databases only so much can fit in memory so that is likely causing additional disk access which will in turn cause a performance hit
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vmichAuthor Commented:
I added another hub transport server to the mix and the issue was resolved. Because of the size of the db's it was causing the hub transport to be over worked...
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vmichAuthor Commented:
hub transport added
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