exchange 2010

Hi Pramod,
Here is a thread from SocialTechnet
https://social.technet.microsoft.com/Forums/exchange/en-US/40e1e028-9e24-44e7-b3b3-567dc1f84598/page-file-settings-for-exchange-2010-servers?forum=exchange2010

Enable circular logging on your database will clear your logs.
Disable again before starting a backup.

I don't want to do that, please let me know where to check my page file size

Here you can see.
http://www.mcci.com/mcci-v5/support/howtos4.html
https://social.technet.microsoft.com/Forums/exchange/en-US/40e1e028-9e24-44e7-b3b3-567dc1f84598/page-file-settings-for-exchange-2010-servers?forum=exchange2010

have your Exchange database on a different drive from the operating system. so this means I cant see page file configuration

That's just best practice to have your data on a separate drive from your OS. It really doesn't answer your question, but if you move the Exchange database to a different drive, you would definitely get space back. And really it's best to let windows manage the size of your swap file anyway.

Perhaps it would be better to use a program like treesize to see where your space is getting used up.

so even the database is on another drive but page file is maintained by the exchange server which is on c drive , so if it goes less than 320mb

it can create back up issues

I'm not sure I understand what you are saying, but it sounds like you have already moved your database? So then like I said, you might be best to use a tool like Treesize or WinDirStat to see if there are other places where you can recover space.

database drives are presented to OS from external storage do we use shadow copy from server

http://kb.commvault.com/article/WFS0010

where do I check this

sorry I was referring to vss failures