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Dashboard telemetry limit scopes #1252

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Jul 5, 2024
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Dashboard telemetry limit scopes #1252

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Dashboard telemetry limit scopes
JamesNK Jul 5, 2024
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JamesNK Jul 5, 2024
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11 changes: 7 additions & 4 deletions docs/fundamentals/dashboard/configuration.md
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Expand Up @@ -125,13 +125,16 @@ The resource service client authentication is configured with `Dashboard:Resourc

Telemetry is stored in memory. To avoid excessive memory usage, the dashboard has limits on the count and size of stored telemetry. When a count limit is reached, new telemetry is added, and the oldest telemetry is removed. When a size limit is reached, data is truncated to the limit.

Limits are per-resource. For example, a `MaxLogCount` value of 10,000 configures the dashboard to store up to 10,000 log entries per-resource.
Telemetry limits have different scopes depending upon the telemetry type:

- `MaxLogCount` and `MaxTraceCount` are shared across resources. For example, a `MaxLogCount` value of 5,000 configures the dashboard to store up to 5,000 total log entries for all resources.
- `MaxMetricsCount` is per-resource. For example, a `MaxMetricsCount` value of 10,000 configures the dashboard to store up to 10,000 metrics data points per-resource.

| Option | Default Value | Description |
|--|--|--|
| `Dashboard:TelemetryLimits:MaxLogCount` | 10,000 | The maximum number of log entries. |
| `Dashboard:TelemetryLimits:MaxTraceCount` | 10,000 | The maximum number of log traces. |
| `Dashboard:TelemetryLimits:MaxMetricsCount` | 50,000 | The maximum number of metric data points. |
| `Dashboard:TelemetryLimits:MaxLogCount` | 10,000 | The maximum number of log entries. Limit is shared across resources. |
| `Dashboard:TelemetryLimits:MaxTraceCount` | 10,000 | The maximum number of log traces. Limit is shared across resources. |
| `Dashboard:TelemetryLimits:MaxMetricsCount` | 50,000 | The maximum number of metric data points. Limit is per-resource. |
| `Dashboard:TelemetryLimits:MaxAttributeCount` | 128 | The maximum number of attributes on telemetry. |
| `Dashboard:TelemetryLimits:MaxAttributeLength` | `null` | The maximum length of attributes. |
| `Dashboard:TelemetryLimits:MaxSpanEventCount` | `null` | The maximum number of events on span attributes. |
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