bdagent.exe takes about 1 Mb of memory usage Regarding the memory usage I have found the following Bitdefender 2014 processes:

In case you want to use additional options such as antispam, two-way firewall, parental control, file schredder, file encryption, system tune-up and safe box with online backup and file synchronization capabilities you should look at Bitdefender Internet Security 2012 and Total Security 2014 versions. Integrated into Facebook and Twitter accounts Bitdefender Antivirus Pro 2014 will scan all incoming links, emails and other data. Allows you to configure network computers with Bitdefender antivirus software installed. You can also use Privacy control to create custom data protection rules. Includes antiphishing protection, search advisor, protection against fraud, protection for instant messaging. Includes quick scan (scan operating system and system files), full system scan, custom scan (allows you to create custom scan tasks and save them), vulnerability scan (scan Microsoft Windows updates and other applications updates), rescue mode (in case some threat is detected but cannot be deleted under Windows you can do it under rescue mode). It includes the following useful features and options: BitDefender Antivirus 2014 meets all basic requirements for the modern antivirus software.

Bitdefender total security 2015 review