Monitor Unix server without any monitoring tool | Linux server monitoring from command mode | Script for server monitoring in performance testing

#!/bin/bash

# Specify the time duration for which you want to collect metrics

start_time="10:00:00"

end_time="11:00:00"

# Interval in seconds

interval=30

# Output file

output_file="metrics.txt"

# Loop to collect metrics every 30 seconds

current_time=$start_time

while [[ "$current_time" < "$end_time" ]]; do

    sar -u -r -d -n DEV -s "$current_time" -e "$current_time" >> "$output_file"

    current_time=$(date -d "$current_time + $interval seconds" +%H:%M:%S)

    sleep $interval

done

Save this script to a file, make it executable (chmod +x script_name.sh), and then run it. It will collect metrics using the sar command every 30 seconds within the specified time range and append the output to the metrics.txt file.

After the script runs, you can open the metrics.txt file in Excel or another tool for analysis. Keep in mind that running this script for an hour will generate a large amount of data, so ensure you have enough disk space for the output file.

Convert Microfocus Loadrunner (VuGen) scripts to Gatling Scripts | Loadrunner to Gatling

Gatling's scripting, based on its specific DSL in Scala, may seem daunting initially. However, the process of converting LoadRunner scripts into Gatling scripts is made accessible through Gatling Recorder and the HAR mode.

Method:
Step 1: Save LoadRunner Script as HAR File: After replaying, save the LoadRunner script as a HAR file. We may see the option on the right hand side of the page as shown in below image.

Step 2: Import this HAR file into Gatling Recorder & Click on the Start button. This will convert HAR file into DSL/Scala script

Step 3:Conversion to DSL/Scala Script: Click on Start in Gatling Recorder, converting the HAR file into a DSL/Scala script.

Step 4:Import into IDE or Editor: Go to the output folder and import RecordedSimulationXXX.scala in your preferred IDE or Editor.


For those with existing scripts in HP Load Generator, the HAR mode provides a bridge to adapt and run them seamlessly in Gatling. In a landscape where cost, concurrency, and efficiency are paramount, Gatling emerges as a beacon of efficiency. Its asynchronous thread approach, coupled with a streamlined process for script conversion, makes it an attractive option for organizations seeking flexibility and cost-effectiveness in their performance testing endeavors. As the software development landscape continues to evolve, Gatling stands ready to meet the challenges head-on, ensuring applications can handle the demands of an ever-expanding user base.

Note: You can also use fiddler to to record the flow and generate .har file, from there we can generate the Gatling scripts too.