Home Scripts How to Limit Resource Usage of PowerShell Scripts – Petri.com

How to Limit Resource Usage of PowerShell Scripts – Petri.com

7 min read

Think about that you simply wish to run a PowerShell script on a server, however you recognize that the script may use loads of sources and influence efficiency. On this article, I’ll present you how one can restrict the sources used when operating PowerShell code.

PowerShell scripts can use loads of sources. And that may be an issue if you’ll want to run a script on a manufacturing server with out impacting efficiency. However there are a few ways you should utilize to restrict the sources PowerShell scripts use. PowerShell jobs allow you to run code asynchronously. So, relatively than executing every line in a script one after one other, you’ll be able to arrange two or extra jobs to run your code concurrently. By organizing your code into script blocks that run as jobs, you get extra management over useful resource utilization.

PowerShell jobs

Jobs are run within the background however return management to PowerShell with out ready for the code to finish. Jobs give you management over how sources are used too. However PS Jobs put a pressure on system sources as a result of they create a brand new PowerShell host course of for every job. So, they aren’t at all times probably the most environment friendly approach to run PowerShell code.

When you begin a job, you should utilize Obtain-Job to get the output. Within the code under, I get the job’s ID quantity utilizing Get-Job after which pipe the thing generated by Get-Job to Obtain-Job, which shows the output within the terminal window.

Picture #1 Develop

Find out how to Restrict Useful resource Utilization of PowerShell Scripts (Picture Credit score: Russell Smith)

PowerShell thread jobs (PS ThreadJobs)

PowerShell 6 launched PS ThreadJobs, which let run a number of threads in a single course of. This improves efficiency whereas decreasing overhead.

As a result of PS Jobs run in a PowerShell host course of, there’s loads of flexibility in how they are often configured to run. For instance, you’ll be able to set the job to run as a unique person, set a working listing, or run the job utilizing a unique model of PowerShell.

PS ThreadJobs don’t present the identical flexibility as PS Jobs, however it’s potential to restrict the variety of threads created to limit the system sources consumed. By default, PS ThreadJobs are restricted to five threads. However utilizing the -ThrottleLimit parameter, you’ll be able to decrease or elevate that quantity:

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Find out how to Restrict Useful resource Utilization of PowerShell Scripts (Picture Credit score: Russell Smith)

ForEach-Object -Parallel parameter

Lastly, PowerShell 7 launched the -Parallel parameter for the ForEach-Object cmdlet. It forces every ForEach-Object loop to run in its personal PS ThreadJob. Every loop will get to run in its personal thread. You can even apply a throttle restrict, similar to when utilizing the Begin-ThreadJob cmdlet.

The command under writes Good day 1,2 and so on. (#Picture 3) to the terminal window with a 1 second delay between every loop. However as a result of every loop is operating in parallel, you see the output seem immediately.

Picture #3 Develop

Find out how to Restrict Useful resource Utilization of PowerShell Scripts (Picture Credit score: Russell Smith)

 

PowerShell jobs offer you some flexibility in how your code runs. Cautious planning and script optimization may help be sure that scripts run effectively with out overwhelming host sources.

 

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