VMware 4817V62 Administration Guide - Page 335

Appendix C Performance Metrics Table C-3. Disk Data Counters (Continued) Counter Label Description Entity VHR C totalWriteLatency usage write Disk Write Latency Disk Usage Disk Write Rate Average amount of time taken during the collection interval to process a SCSI write command issued by the Guest OS to the virtual machine. The sum of kernelWriteLatency and deviceWriteLatency. n Stats Type: absolute n Unit: millisecond n Collection Level: 2 n Rollup Type: average n VC/ESX: Yes/Yes ο•ο ο Aggregated disk I/O rate. For hosts, this metric includes the rates for all virtual machines running on the host during the collection interval. n Stats Type: rate n Unit: kiloBytesPerSecond n Collection Level: 1(4) n Rollup Type: average (min/max) n VC/ESX: Yes/Yes ••ο ο VM Rate at which data is written to each ••ο ο virtual disk on the virtual machine. Host Rate at which data is written to each LUN on the host. Write rate = blocksWritten/second * blockSize n Stats Type: rate n Unit: kiloBytesPerSecond n Collection Level: 2 n Rollup Type: average n VC/ESX: Yes/Yes Management Agent Metrics The management agent metric group tracks consumption of resources by the various management agents (hostd, vpxd, and so on) running on the ESX/ESXi host. Table C-4 lists the management agent data counters. NOTE The management agent metrics appear only in the advanced performance charts. VMware, Inc. 335