How to retrieve available RAM from Windows command

Question

Is there a command line utility within Windows or third-party program that can retrieve available RAM on a machine? (Since I don't believe this can be done in pure JAVA, since it is run within a virtual machine, that has preset / allocated RAM)?

Answer 1

Bit old but I wanted to know similar. Just adding the solution I came across since IMO the best answer came from Everardo w/ Physical Memory

wmic OS get FreePhysicalMemory /Value

This lead me to look deeper into wmic... Keep in mind Free Physical Memory is not the type to look at.

wmic OS get FreePhysicalMemory,FreeVirtualMemory,FreeSpaceInPagingFiles /VALUE

This returns something like...

FreePhysicalMemory=2083440
FreeSpaceInPagingFiles=3636128
FreeVirtualMemory=842124

Answer 2

Try MemLog. It does the job perfectly and quickly.

Download via one of many mirrors, e.g. this one: SoftPedia page for MemLog.
(MemLog's author has a web site. But this is down some times. Wayback machine snapshot here.)

Example output:

C:\>memlog
2012/02/01,13:22:02,878956544,-1128333312,2136678400,2138578944,-17809408,2147352576

878956544 being the free memory

Answer 3

wmic OS get FreePhysicalMemory /Value

Answer 4

wmic OS get TotalVisibleMemorySize /Value

Note not TotalPhysicalMemory as suggested elsewhere

Answer 5

This cannot be done in pure java. But you can run external programs using java and get the result.

Process p=Runtime.getRuntime().exec("systeminfo");
Scanner scan=new Scanner(p.getInputStream());
while(scan.hasNext()){
    String temp=scan.nextLine();
    if(temp.equals("Available Physical Memmory")){
       System.out.println("RAM :"temp.split(":")[1]);
       break;
    }
}