Monitor Memory Usage of my own Process

Here are some functions that should give you what you are after:

// Get minimum working set size
function GetMinWorkingSetSize: DWORD;
var  dwTemp:        DWORD;
begin

  if not(GetProcessWorkingSetSize(GetCurrentProcess, result, dwTemp)) then result:=0;

end;

// Get maximum working set size
function GetMaxWorkingSetSize: DWORD;
var  dwTemp:        DWORD;
begin

  if not(GetProcessWorkingSetSize(GetCurrentProcess, dwTemp, result)) then result:=0;

end;

// Get number of bytes allocated for delphi's heap manager
function GetCurrentSetSize: DWORD;
var  lpHeapStatus:  THeapStatus;
begin

  lpHeapStatus:=GetHeapStatus;
  result:=lpHeapStatus.TotalAddrSpace;

end;

procedure TForm1.Button1Click(Sender: TObject);
begin

  ShowMessage(IntToStr(GetMinWorkingSetSize));
  ShowMessage(IntToStr(GetMaxWorkingSetSize));
  ShowMessage(IntToStr(GetCurrentSetSize));

end;


Regards,
Russell

Also, you may want to look into the GetHeapStatus function (used in the GetCurrentSize function). This returns a structure detailing current memory usage for the delphi process.

type

  THeapStatus = record
    TotalAddrSpace: Cardinal;s
    TotalUncommitted: Cardinal;
    TotalCommitted: Cardinal;
    TotalAllocated: Cardinal;
    TotalFree: Cardinal;
    FreeSmall: Cardinal;
    FreeBig: Cardinal;
    Unused: Cardinal;
    Overhead: Cardinal;
    HeapErrorCode: Cardinal;

  end;

Also, there is AllocMemCount/AllocMemSize that can return the number of allocated memory blocks, and the size of the allocated memory blocks (respectively)

Russell

As I understand it, Min & Max Working Set Size are "desired" limits.  I'd like to find Current & Peak Working Set Size.  I believe that it is these two values that Task Manager calls "Mem Usage"

I'll have to experiment with the numbers from THeapStatus.  Delphi's help info did not clarify it.

AllocMemSize does not measure Current Working Set Size

My misunderstanding on what you were after....

Check GetProcessMemoryInfo which is available from the psapi.pas unit. The GetProcessMemoryInfo function will return the following information in a record structure.

typedef struct _PROCESS_MEMORY_COUNTERS {
    DWORD cb;
    DWORD PageFaultCount;
    SIZE_T PeakWorkingSetSize;
    SIZE_T WorkingSetSize;
    SIZE_T QuotaPeakPagedPoolUsage;
    SIZE_T QuotaPagedPoolUsage;
    SIZE_T QuotaPeakNonPagedPoolUsage;
    SIZE_T QuotaNonPagedPoolUsage;
    SIZE_T PagefileUsage;
    SIZE_T PeakPagefileUsage;
} PROCESS_MEMORY_COUNTERS;

This will return the peak and current working set size for the process. If you need an example of usage, just ask.

Regards,
Russell

I would love an example.  Thanks

Thank you so much!

My EE-display has changed like to "inquiry only" and I can't find the "Accept" button.

I'll try harder in a few minutes...