QAInsights JMeter AI

Debug Sampler

Configure the JMeter Debug Sampler miscellaneous features: properties, defaults, and practical usage notes for building reliable load tests.

Difficulty: intermediate
Guide type: reference
Estimated read time: 1 min read
Last verified version: Verified JMeter 5.6

Part of the Miscellaneous Features category. Also documented in context in the full Component Reference.

Debug Sampler

The Debug Sampler generates a sample containing the values of all JMeter variables and/or properties.

The values can be seen in the View Results Tree Listener Response Data pane.

Name	Required	Description
Name	No	Descriptive name for this element that is shown in the tree.
JMeter Properties	Yes	Include JMeter properties?
JMeter Variables	Yes	Include JMeter variables?
System Properties	Yes	Include System properties?

Was this page helpful?

On this page

QAInsights JMeter AI I Am Speed Dosa

Getting Started

Docs MCP Get Started

Error Playbooks

Error Playbooks Index

Interactive Tools

Tools Hub cURL & HAR to JMX OpenAPI to JMX JMX Linter & Health Analyzer Groovy Script Builder Thread Calculator Heap Estimator CLI Command Builder Distributed Testing Planner Linux OS & Kernel Tuning Coordinated Omission Properties Cheat Sheet Regex Extractor Builder

Components

Functions

All Functions __regexFunction __counter __threadNum __threadGroupName __intSum __longSum __StringFromFile __machineName __machineIP __javaScript __Random __RandomDate __RandomString __RandomFromMultipleVars __UUID __CSVRead __property __P __log __logn __BeanShell __groovy __split __XPath __setProperty __time __jexl2 __jexl3 __V __evalVar __eval __char __unescape __unescapeHtml __escapeHtml __urldecode __urlencode __FileToString __samplerName __TestPlanName __escapeOroRegexpChars __escapeXml __timeShift __digest __dateTimeConvert __isPropDefined __isVarDefined __changeCase __StringToFile

Topic Guides

JMeter for Beginners API Load Testing JWT / OAuth / SSO Mutual TLS (mTLS) & Client Certs Correlation & Dynamic Values HTTP Recorder Functions & Variables CSV Data Set & Parameterization JSR223 Groovy Scripting Assertions & SLA Validation Logic Controllers & Flow Control Timers, Think Time & Pacing Thread Groups & Workload Modeling JDBC Database Load Testing JVM & OS Performance Tuning Plugins Essentials WebSocket Load Testing gRPC / Kafka / MQTT Grafana / Influx / Backend Listener APDEX / SLOs / Percentiles HTML Dashboard & APDEX Customization Docker / Kubernetes CI/CD Load Testing Distributed Testing Programmatic / DSL Plans Troubleshooting Interview Questions

User Manual

Building a Test Plan Elements of a Test Plan Building a Web Test Plan Advanced Web Test Plan Database Test Plan FTP Test Plan LDAP Test Plan Extended LDAP Test Plan Webservice Test Plan JMS Point-to-Point JMS Topic Test Plan Programmatic Test Plan Listeners Remote Testing Dashboard Report Real-time Results Best Practices Boss cURL Hints and Tips Glossary Regular Expressions Functions and Variables Properties Reference Component Reference

Extending JMeter

Extending JMeter Dashboard Generator

Reference

Release Notes Changes Changes History History & Future Building JMeter Creating Templates Download JMeter Security Issue Tracking Mailing Lists

Legal

Disclaimer NOTICE