Analyzer py-write-latency-fgraph

# Name

py-write-latency-fgraph - Python-Land Virtual File System Write Latency Flame Graph

This analyzer profiles the latency of file system write operations in Python applications. It captures stack traces and measures the time spent in virtual file system write calls. The analyzer generates flame graphs that visualize latency distribution in microseconds across code paths, helping identify slow write operations and diagnose file system performance issues in Python applications.

# Resource Category

Disk I/O.

# Application Type & Technical Stack

• Python

# 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 py-write-latency-fgraph -p PID

# trace a shell command directly
orxray analyzer run py-write-latency-fgraph -c SHELL_CMD

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

# trace any processes started from the specified executable path.
orxray analyzer run py-write-latency-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.