BO Auditor DB

Hi All,

I am planning to install BO server. I have couple of questions related to Auditor. Please help me with your experience.

1) If I use same DB schema to store audit table where CMS repository is stored then will it impact the performance of Existing reports. (What is recommended). after server installation, I am gonna import existing reports from other environments.

2) If I use same DB schema to store audit table where CMS repository is stored then we need different admin user account for Auditor Configuration than CMS repository. Or I can use same DB user which I have used for CMS  In nutshell, can i use same DB credentials in attached screen while installing server

3) Is there anything, which needs attention while installing Auditor along with server?

4) Any other configuration/setup needs to be done after server and Auditor is installed?

Thanks

Akash