Disabling the request histogram facility
The rhist off request disables the request histogram facility. This is the default value.
The data objects remain persistent, and the data they contain is not disturbed. This data is not updated again until rhist on is issued. rhist off may be combined with rhist on as often as desired. If there are no mounted file systems at the time rhist off is issued, the facility is still disabled. The response is a single string.
Table 1 describes the keywords for the rhist off response, in the order that they appear in the output. These keywords are used only when mmpmon is invoked with the -p flag.
| Keyword | Description |
|---|---|
| _n_ | IP address of the node responding. This is the address by which GPFS knows the node. |
| _nn_ | The hostname that corresponds to the IP address (the _n_ value). |
| _req_ | The action requested. In this case, the value is off. |
| _rc_ | Indicates the status of the operation. |
| _t_ | Indicates the current time of day in seconds (absolute seconds since Epoch (1970)). |
| _tu_ | Microseconds part of the current time of day. |
An _rc_ value of 16 indicates that the histogram operations lock is busy. Retry the request.