Beserver.exe memory usage keeps increasing after every backup job until the service is restarted.
A hotfix is now available for this issue in the current version(s) of the product(s) mentioned in this article. Refer to the Hotfix link under Related Articles at the end of this article to obtain the hotfix needed to resolve the issue.
Backup Exec 2012 Rev 1798 Hotfix 201596. Device Driver Installer DDI20121215 (December 15th, 2012) (TECH201596)