ESXTOP Commands Troubleshooting storage performance issues can be difficult. ESXTOP Command tool can help. Note: Alway check with your storage vendor for assistance before spending too much time trying to solve storage issues. The differences between NAS, NFS, SAN, iSCSI is enormous and requires expertise. Command Strings and Switches I thought I’d post some useful CLI ESXTOP commands to help with monitoring storage for when you start having performance problems resulting from over subscribed storage. 1. Monitor overall storage performance per HBA: esxtop d f b,c,d,e,h,j s,2 2. Monitor storage performance per LUN: * esxtop u f b,c,f,h s,2 3. Monitor storage performance per VM: * esxtop v f b,d,e,h,j s,2 * These options are only available in ESX 3.5 and greater. The columns we are going to pay attention to are CMDS/s, DAVG/cmd, KAVG/cmd and GAVG/cmd. Below is a brief description of each of these values. CMDS/...
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