Oracle ASMLIB is an optional support library for the Automatic Storage Management feature of the Oracle Database. Automatic Storage Management (ASM) simplifies database administration and reduces kernel resource usage, such as the number of open file descriptors. ASM eliminates the need for the DBA to directly manage many Oracle database files, requiring only the management of groups of disks allocated to the Oracle Database. ASMLIB can make an Oracle Database using ASM more efficient and capable of accessing the disk groups it's using.