Analyzer perl-write-latency-fgraph

# Name

perl-write-latency-fgraph - Perl-Land Virtual File System Write Latency Flame Graph

This analyzer profiles the latency of virtual file system write operations in Perl-land code execution. It captures stack traces during file write system calls, measuring the time spent in each operation. The analyzer generates flame graphs showing latency distribution across different code paths, helping identify slow write operations and optimize file persistence performance in Perl applications.

# Resource Category

Disk I/O.

# Application Type & Technical Stack

• Perl

# 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 perl-write-latency-fgraph -p PID

# trace a shell command directly
orxray analyzer run perl-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 perl-write-latency-fgraph -p -PGID

# trace any processes started from the specified executable path.
orxray analyzer run perl-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.