# tt_all_devices_metrics_readable_percent

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## Name

### Prometheus Metric Name

```
tt_all_devices_metrics_readable_percent
```

### Metric Path (tt-telemetry)

Schema:

```
{hostname}/telemetry/tt_all_devices_metrics_readable_percent
```

Example path:

```
bh-glx-c09u02/telemetry/tt_all_devices_metrics_readable_percent
```

## Description

The percentage of metrics that are successfully readable across all devices on this host. This provides a system-wide health indicator. A value below 100% indicates that some metrics are failing to read, which may point to device communication issues.

## Values

**Type:** Floating Point

**Units:** None

**Allowable values:**
A floating-point number from `0.0` to `100.0` representing the percentage of readable metrics. For example, `100.0` means all metrics across all devices are readable.

## Prometheus Labels

|Label Name|Value|
|---|---|
|hostname|The host from which the metric was collected.|
|hall|The datacenter hall where the host is located. Sourced from the Factory System Descriptor (FSD).|
|aisle|The datacenter aisle where the host is located. Sourced from the Factory System Descriptor (FSD).|
|rack|The rack number where the host is located. Sourced from the Factory System Descriptor (FSD).|
|shelf_u|The shelf U position in the rack where the host is located. Sourced from the Factory System Descriptor (FSD).|