How to get free physical memory of operating system using C#?

Question

0.00/5 (No votes)

See more:

Hi all,
I want to fetch the FreePhysicalMemory of os using c#.
i used WMI query for Win32_OperatingSystem class but it is not giving the accurate value
plz help me
TIA

What I have tried:

below is my code

ObjectQuery wql = new ObjectQuery("SELECT * FROM Win32_OperatingSystem");
ManagementObjectSearcher searcher = new ManagementObjectSearcher(wql);
ManagementObjectCollection results = searcher.Get(); 
foreach (var result in results)
{
 amountFree = Convert.ToInt32( result["FreePhysicalMemory"]);
}

Posted 19-Nov-17 21:38pm

sumitk.cadc

Updated 19-Nov-17 22:24pm

Add a Solution

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

OriginalGriff · Answer 1 · 2017-11-19T21:55:00

Try this:

ManagementObjectSearcher search = new ManagementObjectSearcher("root\\CIMV2", "Select TotalVisibleMemorySize, FreePhysicalMemory from Win32_OPeratingSystem");

foreach (ManagementObject x in search.Get())
    {

    ulong totalMemory = (ulong)x["TotalVisibleMemorySize"];
    ulong freeMemory = (ulong)x["FreePhysicalMemory"];
    }

freeMemory is returned in KB, and seems about right on my system. It's difficult to be precise, because the system free memory varies all the time as processes allocate and free memory as a part of their normal activity.

Jochen Arndt · Answer 2 · 2017-11-19T22:24:00

Solution 2

Quote:
i used WMI query for Win32_OperatingSystem class but it is not giving the accurate value

How do you know that it is not accurate?

There may be two reasons that the result is not as expected:

You missed that the value is in kilobytes
There may be less free memory than expected when used by the system for prefetching (Prefetcher - Wikipedia[^])

Posted 19-Nov-17 22:24pm

Jochen Arndt

Comments

sumitk.cadc 20-Nov-17 13:29pm

hello sir,
i am cross checking the values with task manager's performance tab data.
actually i want to fetch all data of performance and networking data.i am using performance counters for it.