One post tagged with "jmeter"

Essential Java Startup and JVM Arguments Explained

September 6, 2017 · 2 min read

Software developer and technical writer

This note explains a typical Java startup command used while running load tests on Linux:

java -server \
  -XX:+HeapDumpOnOutOfMemoryError \
  -Xms512m \
  -Xmx512m \
  -XX:+UseG1GC \
  -XX:MaxGCPauseMillis=250 \
  -XX:G1ReservePercent=20 \
  -Djava.security.egd=file:/dev/urandom \
  -jar xxxx.jar

JVM options must appear before -jar or the main class. Application arguments belong after the JAR name or main class. When diagnosing startup problems, record the exact command, Java version, environment variables, operating-system limits, and container memory limits.