High Memory Usage

Hi, I am facing slowness in server due to high memory usage. DB and application are working in same server. Application is consuming 2 GB memory and DB is also using 2 GB memory MySQL and Tomcat are running in same server. OS - windows Server 2008 R2 MySQL version- 5.6.13 64 Bit Tomcat - 7.0.42 System Memory - 7 GB Memory assigned for innodb_buffer_pool_size=1 GB key buffer size =8 M join_buffer_size-256K Max_connection - 1000 Max_user_connection - 41 Images are saved in server in a drive and image path is save in one table and in another table TEXT data type is used. Kindly give your suggesstion