Latency Monitor

A Latency Monitor pings a host or hop and measures the round-trip time. Its settings are shown on a single scrolling page, organised into the sections below. To open them, select the monitor in the Monitors list — or right-click it and choose Edit….

Monitor

The identity of the monitor.

Field	Description
Symbol	The icon for the monitor. Click it to choose a different one from the symbol picker; it appears in the main view, History view, and (optionally) the menu bar.
Name	The description PeakHour uses to refer to this monitor throughout the app. Set something meaningful.
Dashboard role	A pill showing which Internet Dashboard hop this monitor is designated as (for example, This Mac to Router), if any. See Designating a Monitor.
Edit…	Opens the Configuration Assistant to change what’s measured.

Status

Shows the monitor’s current status and what it’s monitoring. For a multi-host monitor, an error is labelled (Near) or (Far) to show which end it relates to.

Settings

Field	Description
Enabled	Turns monitoring on or off.
Visibility	Whether the monitor appears in the main window. Automatic hides it when it can’t be reached; Always Visible always shows it; Always Hide always hides it. A hidden monitor still runs and gathers data.

Display

Controls how the monitor appears in the main window.

View mode

• Graph View — shows the monitor with its graph as well as the details. You can also toggle the graph with the disclosure triangle.
• Summary View — shows the details only, hiding the graph.

Graph Timespan — how many minutes of data the main graph retains. You can scroll the graph vertically to see up to 12 hours back; larger values can affect performance. For older data, use the History view.

Latency colors and the congestion thresholds that drive them are set globally for all monitors — see Display → Latency Colors and Congestion Thresholds. Each monitor’s own minimum-latency baseline, set under Latency below, determines where those thresholds apply.

Latency

Adjusts what PeakHour treats as ‘normal’ (minimum) latency — the baseline for the Normal, Slight Congestion, and Heavy Congestion colors.

Field	Description
Connection Latency	The minimum-latency baseline. Automatic detects and measures it for you; or drag the slider to set it manually.
Measured Minimum	The currently measured minimum latency. Click Reset to re-measure.
Reset on Startup (Automatic only)	Resets the minimum each time PeakHour starts or monitors are reset. On by default.
Show on Graph	Draws the minimum-latency line on the graph.
Show Label	Adds the minimum value to that line.

Notifications

Notify on Reachability Change — posts a notification when this monitor becomes reachable or unreachable.

CSV Logging

Logs average latency to a CSV file you can open in Numbers, Excel, or similar.

Log to file — enable logging and choose the Log Directory. Because of app sandboxing, you must click Choose… to grant PeakHour permission to write there. Reveal opens that folder in Finder.

Frequency

Setting	Description
Write Every	How often a new record (line) is written.
Rotate Every	How often a new log file is started.

Log filename — files are stored in the Log Directory with a name based on the rotation frequency:

Rotation	Filename
Hourly	<Description> YY-MM-DD HH:MM.csv
Daily	<Description> YY-MM-DD.csv
Weekly	<Description> YY-MM-DD w.csv (w = week number)
Monthly	<Description> YY-MM.csv
Yearly	<Description> YYYY.csv

where <Description> is the monitor’s name.

Log format — each row contains:

Field	Description
Date/Time	The entry’s date and time in your local format.
Target	The monitor’s description.
Average Response Time (ms)	The average latency over the period.