# tt_last_update_timestamp

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## Name

### Prometheus Metric Name

```
tt_last_update_timestamp
```

### Metric Path (tt-telemetry)

Schema:

```
{hostname}/telemetry/tt_last_update_timestamp
```

Example path:

```
bh-glx-c09u02/telemetry/tt_last_update_timestamp
```

## Description

The Unix timestamp (in milliseconds) of the last completed sampling cycle. This is updated at the end of each telemetry collection cycle and can be used to determine how recently metrics were refreshed.

## Values

**Type:** Unsigned Integer

**Units:** None

**Allowable values:**
A Unix timestamp in milliseconds. For example, `1711900800000` represents a specific point in time.

## 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).|