Analyzer pagefault-fgraph

# Name

pagefault-fgraph - Page Fault Flame Graph

This analyzer profiles page fault events across all applications. It captures C-level stack traces when page faults occur, tracking both minor and major page faults. The analyzer generates flame graphs showing code paths triggering page faults, helping identify memory access patterns causing excessive paging and optimize memory usage.

# Resource Category

CPU.

# Application Type & Technical Stack

• All

# 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 pagefault-fgraph -p PID

# trace a shell command directly
orxray analyzer run pagefault-fgraph -c SHELL_CMD

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

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

# Tracing Multiple Processes

Supported.

# Output Formats

• Flame Graphs

# Author

The OpenResty Inc. Team.

# Copyright

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