ASMCMD is very slow

asmcmd provides a command line interface for Oracle's Automatic Storage Management. It gives a familiar Unix style feel to negotiate around it rather than having to construct SQL statements through sqlplus.

One of the big problems with it though is that it is very slow. Is there a way to speed it up?

Yes there is. asmcmd is actually a perl script that queries the underlying V$ASM_FILE and V$ASM_DISKGROUP views. The script of interest is the file $ORACLE_HOME/bin/asmcmdcore

Edit this file and change references to V$ASM_DISKGROUP with V$ASM_DISKGROUP_STAT

You will notice a dramatic increase in speed. V$ASM_DISKGROUP with V$ASM_DISKGROUP_STAT return the same information. The difference is that V$ASM_DISKGROUP_STAT retrieves it's information from cache where as V$ASM_DISKGROUP retrieves its information from disk every time.