Service graphs
Graph Information
This graph shows average waiting time/latency for different categories of disk operations. The times that include the queue times indicate how busy your system is. If the waiting time hits 1 second then your I/O system is 100% busy.
| Field |
Internal name |
Type |
Warn |
Crit |
Info |
| Device IO time |
svctm |
gauge |
|
|
Average time an I/O takes on the block device not including any queue times, just the round trip time for the disk request. |
| IO Wait time |
avgwait |
gauge |
|
|
Average wait time for an I/O from request start to finish (includes queue times et al) |
| Read IO Wait time |
avgrdwait |
gauge |
0:180 |
0:240 |
Average wait time for a read I/O from request start to finish (includes queue times et al) |
| Write IO Wait time |
avgwrwait |
gauge |
0:180 |
0:240 |
Average wait time for a write I/O from request start to finish (includes queue times et al) |
