---
title: "Poisson Random Timer"
description: "Configure the JMeter Poisson Random Timer timers: properties, defaults, and practical usage notes for building reliable load tests."
url: https://docs.jmeter.ai/components/poisson-random-timer/
lastUpdated: 2026-10-01
source: docs.jmeter.ai
---

# Poisson Random Timer

*Part of the **Timers** category. Also documented in context in the [full Component Reference](/user-manual/component-reference/#poisson-random-timer).*

![Poisson Random Timer](/images/screenshots/timers/poisson_random_timer.png)

This timer pauses each thread request for a random amount of time, with most
of the time intervals occurring near a particular value.  The total delay is the
sum of the Poisson distributed value, and the offset value.

Note: if you want to model Poisson arrivals, consider using [Precise Throughput Timer](/components/precise-throughput-timer/) instead.

| Name | Required | Description |
| --- | --- | --- |
| Name | No | Descriptive name for this timer that is shown in the tree |
| Lambda | Yes | Lambda value in milliseconds. |
| Constant Delay Offset | Yes | Number of milliseconds to pause in addition to the random delay. |

^

## Related

- [Timers, Think Time & Pacing](/topics/timers-pacing-throughput-modeling/)
- [Thread Calculator](/tools/thread-calculator/)
- [Full Component Reference](/user-manual/component-reference/)
- [Functions and Variables](/user-manual/functions/)