PowerShell 7.3 - How to Read Large CSV Files Efficiently Without Running Out of Memory?
Can someone help me understand I've spent hours debugging this and I'm stuck trying to I'm trying to figure out I've been struggling with this for a few days now and could really use some help... I'm currently working with PowerShell 7.3 to process large CSV files for data analysis. However, when trying to read a CSV file that is around 5 GB, I'm working with memory issues that cause PowerShell to crash or slow down significantly. I've tried using `Import-Csv`, but it seems to load the entire file into memory, which is not feasible for such large datasets. Here's what I've attempted: ```powershell # Attempt to read the CSV file $data = Import-Csv -Path 'C:\path\to\largefile.csv' ``` After running this, I get an behavior message saying `OutOfMemoryException`, and the script just hangs for a long time before failing. I also tried using `Get-Content` to read the file line by line, but the performance is terrible because it seems to take a lot of time to process each line individually: ```powershell Get-Content -Path 'C:\path\to\largefile.csv' | ForEach-Object { # Process each line } ``` I've read that using the `-ReadCount` parameter with `Import-Csv` could help, but I'm not sure how to implement it effectively. Additionally, I'm considering using `StreamReader`, but I'm unclear on how to parse the CSV format correctly. Can anyone provide guidance on the best practices for handling large CSV files in PowerShell without hitting memory limits? Any tips or sample code would be greatly appreciated! This is part of a larger service I'm building. Has anyone else encountered this? I'm working on a CLI tool that needs to handle this. I'd really appreciate any guidance on this. For context: I'm using Powershell on CentOS. Any ideas how to fix this? The project is a microservice built with Powershell. This is for a REST API running on Debian. Am I missing something obvious?