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Add memory metrics
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@mayurkale22
mayurkale22 committed Apr 13, 2019
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Expand Up @@ -7,20 +7,23 @@ TODO: Add list of supported platforms.
## Common metrics collection
These are some default metrics supported by OpenCensus system metrics package/contrib. This is to ensure consistency across language implementations, as far as practical.

| Metric Name | Unit | Type | Description | Labels |
|-------------------------------------------|-------|----------------------------|-----------------------------------------------------------------------------------------------|-----------------|
| system/cpu_seconds/total | s | Int64 Cumulative | Total kernel/system user CPU in seconds. | Hostname, Mode |
| system/processes/created | 1 | Int64 Cumulative | Total number of times a process was created. | Hostname |
| system/processes/running | 1 | Int64 Gauge | Total number of running processes. | Hostname |
| system/disk/total | By | Int64 Gauge | The total available system disk space in bytes. | Hostname, Volume |
| system/disk/used | By | Int64 Gauge | The total used system disk space in bytes. | Hostname, Volume |
| process/heap/total | By | Int64 Gauge | The process's total allocated heap size in bytes. | Hostname |
| process/heap/used | By | Int64 Gauge | The process's total used heap size in bytes. | Hostname |
| process/memory/rss | By | Int64 Gauge | Resident memory size in bytes. | Hostname |
| process/file_descriptor/max | 1 | Int64 Gauge | The maximum limit of file descriptor count. | Hostname |
| process/file_descriptor/open | 1 | Int64 Gauge | The number of open file descriptor count. | Hostname |
| process/start_time | s | Int64 Cumulative | The start time of the process since unix epoch in seconds. | Hostname |
| process/cpu/usage | s | Int64 Cumulative | The total user and system CPU time spent in seconds. | Hostname |
| Metric Name | Unit | Type | Description | Labels |
|-------------------------------------------|-------|----------------------------|--------------------------------------------------------------------|-------------------------|
| system/cpu_seconds/total | s | Int64 Cumulative | Total kernel/system user CPU in seconds. | Hostname, Mode |
| system/processes/created | 1 | Int64 Cumulative | Total number of times a process was created. | Hostname |
| system/processes/running | 1 | Int64 Gauge | Total number of running processes. | Hostname |
| system/processes/blocked | 1 | Int64 Gauge | Total number of blocked processes. | Hostname |
| system/memory/total | By | Int64 Gauge | Total system memory capacity in bytes. | Hostname |
| system/memory/free | By | Int64 Gauge | Total free system memory in bytes. | Hostname |
| system/memory/used | By | Int64 Gauge | Total used system memory in bytes. | Hostname |
| system/disk/total | By | Int64 Gauge | The total available system disk space in bytes. | Hostname, Volume |
| system/disk/used | By | Int64 Gauge | The total used system disk space in bytes. | Hostname, Volume |
| process/memory/rss | By | Int64 Gauge | Resident memory size in bytes. | Hostname |
| process/file_descriptor/max | 1 | Int64 Gauge | The maximum limit of file descriptor count. | Hostname |
| process/file_descriptor/open | 1 | Int64 Gauge | The number of open file descriptor count. | Hostname |
| process/heap/total | By | Int64 Gauge | The process's total allocated heap size in bytes. | Hostname |
| process/heap/used | By | Int64 Gauge | The process's total used heap size in bytes. | Hostname |
| process/cpu/usage | s | Int64 Cumulative | The total user and system CPU time spent in seconds. | Hostname |

### Labels
The label keys associated with the above metrics.
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