少于1分钟 | 最后修改: 0001-01-01, 0:00:00 am

Analyzer java-safepoint

java-safepoint: Java Safepoint Pause Histogram.

Name

java-safepoint - Java Safepoint Pause Histogram

This analyzer measures how long HotSpot stays in a safepoint. A safepoint is a JVM-wide coordination point: Java threads must reach a safe state before HotSpot can do work such as some GC operations, deoptimization, class operations, or thread inspection. The histogram shows pause frequency and duration, with minimum, average, maximum, and total time.

Resource Category

Latency.

Application Type & Technical Stack

  • Java

Command Line Syntax

The analyzer can be invoked directly on the command-line via the orxray utility from the openresty-xray-cli software package.

Alternatively, the analyzer can also be invoked manually or automatically on the web console UI of OpenResty XRay (like on the Advanced web page).

# PID is the target process PID.
orxray analyzer run java-safepoint -p PID

# trace a shell command directly
orxray analyzer run java-safepoint -c SHELL_CMD

# PGID is the process group ID or any process's PID within the target process
# group.
orxray analyzer run java-safepoint -p -PGID

# trace any processes started from the specified executable path.
orxray analyzer run java-safepoint --exe /path/to/exe/file

Tracing Multiple Processes

Supported.

Output Formats

  • Histogram Bar Charts
  • Plain Texts

Author

The OpenResty Inc. Team.

Copyright (C) by OpenResty Inc. All rights reserved.