Most of  the storage engineers experienced with performance and latency issues, This starts from the infrastructure design and deployment phase which was not planned in-order to satisfy the future load. Here I have described the disk's types and it iops capacity which may help in better understanding for the future new deployments. Commonly used disk types in storage's: DiskType Expansion SATA  Serial Advanced Technology Attachment, often abbreviated SATA or S-ATA FC  Fiber Channel disks SAS Serial Attached SCSI SSD  Solid-state disks IOPS: Input output per seconds, IOPS are used to define the performance of a given disk or disk array. RPM Max Iop’s 5.4K RPM   50-80   7.2K RPM   75-100 10K RPM 125-150 15K RPM   175-210  Two  features which involves in iops calculation Average latency Average seek time Two type...

I have described below the CPU parameters of ESXTOP command, In a virtual environment virtual-machine's mostly have performance issues as default even its small or enterprise but it's easy to find the reason "why" if we understand what exactly the performance parameters show's. There are several other parameter which needs to be considered for performance analysis and troubleshooting but these are by default which should be considered first level of investigation. %RUN:  This  value represents the percentage of absolute time the virtual machine was running on the system. If the virtual machine is unresponsive, %RUN may indicate that the guest operating system is busy conducting an operation. When %RUN is near zero and the virtual machine is unresponsive, it could mean that the virtual machine is idle, blocked on an operation, or is not scheduled due to resource contention. Look at other values (%WAIT, %RDY, and %CSTP) to identify resource co...