You can also identify queries using spwho2 and spwhoisactive which has high logical reads and high cpu usage and then you can kill particular process.

I suppose you are referring to "Dedicated Administrator Connection (DAC)" and therefore I edited the title of the post to resemble that. Dedicated Administrator Connection is something that should be used with great care, because when connecting with DAC, you can access a number of internal tables.

When connecting from SSMS, you can enter the server name as "ADMIN:servername" to connect using the Dedicated Administrator Connection. This MSDN article provides more information.

Incomplete article written in barely-comprehensible broken English. Can an admin nuke this please?

So, I edited the post, changed the title and completely rephrased the content. Anyone would like to enhance it further?