eG Monitoring
 

Measures reported by EsxStorageAdapTest

This test reports critical usage statistics pertaining to the storage adapter of the ESXi / VDi servers.

The measures made by this test are as follows:

Measurement Description Measurement Unit Interpretation
Write_Request Indicates the average number of write commands issued per second on this storge adapter during the collection interval. Commands/Sec The detailed diagnosis of this measure lists out the average number of write commands issued per second on this storage adapter.
Read_Request Indicates the average number of read commands issued per second on this storge adapter during the collection interval. Commands/Sec The detailed diagnosis of this measure lists out the average number of read commands issued per second on this storage adapter.
Write_Latency Indicates the average amount of time taken for a write in the storage adapter from the perspective of a guest operating system. Secs The detailed diagnosis of this measure lists out the average amount of time taken for a write in this storage adapter.
Read_Latency Indicates the average amount of time taken for a read in the storage adapter from the perspective of a guest operating system. Secs The detailed diagnosis of this measure lists out the average amount of time taken for a read in this storage adapter.
Read_Rate Indicates the rate at which the commands are read from the storage adapter. MB/sec The detailed diagnosis of this measure lists out the details regarding the rate at which the commands are read from the storage adapter.
Write_Rate Indicates the rate at which the commands are written on the storage adapter. MB/sec The detailed diagnosis of this measure lists out the details regarding the rate at which the commands are written on the storage adapter.
Issued_commands Indicates the average number of commands issued per second on storage adapter during the collection interval. Commands/Sec Use the detailed diagnosis to figure out the average number of commands issued per second on this storage adapter during the collection intertval.
Status Indicates the status of the storage adapter.   This measure reports the status of the storage adapter as follows:
  • Online
  • Offline
  • Fault
  • Unknown

The numeric values that correspond to the above-mentioned states are as follows:

State Numeric Value
Online 0
Offline 1
Fault 2
Unknown 3

Note:

By default, this measure reports the above-mentioned states while indicating the state of the storage path. However, the graph of this measure will be represented using the corresponding numeric equivalents of the states as mentioned in the table above.
Total_luns Indicates the number of luns that communicate to the storage adapter. Number  
Total_paths Indicates the number of paths through which the storage adapter is communicated with. Number  
Total_targets Indicates the number of targets that communicate with the storage adapter. Number  
Total_latency Indicates the total amount of time taken to read from and write into this storage adapter from the perspective of guest operating system. Secs A high value or a consistent rise in the value of this measure is a cause for concern, as it indicates a current/potential I/O processing bottleneck with the storage adapter.
Throughput Indicates the rate at which the data is ead from or written into the storage adapter. MB/Sec Ideally, the value of this measure should be high. A sudden or steady drop in this value could indicate a gradual deterioration in the performance of the storage adapter, probably owing to a processing bottleneck.