Bernard
I'm going to assume that this test program is representative of what
you're doing with Metakit -- otherwise my answer is wrong, and you should
disregard it.
No, you're not doing anything "wrong" here and neither is Metakit. It's
just that your expectation of what Metakit should do is wrong. v.Add(..)
will always add a new row, as the increasing number of rows printed by
your program shows. Because the view keeps growing, so does the memory
usage.
Please read up on c4_View::Add() and what it does. I think you're
expecting the id to somehow serve as a key and to overwrite existing rows
with that id. This is not how Metakit works.
--JYL
> Thank you all for your explanations.
>
> However, my little test program keeps eating up more and more real, not
> only virtual, memory.
> Here is my test code for Linux:
>
> //------------------------------main.cpp-----------
> #include <iostream>
> #include <unistd.h>
> #include <mk4.h>
>
> void ShowMemoryInfo(){ // shows some lines of /proc information
> pid_t id = getpid();
>
> const long file_name_size = 256;
> char file_name[file_name_size];
> snprintf( file_name, file_name_size, "/proc/%d/status", id );
> FILE* fp = fopen( file_name, "r" );
> if ( fp == NULL )
> {
> std::cout << "cannot open file ='" << file_name << "'" << std::endl;
> return;
> }
>
> const long line_size = 1024;
> char line[line_size];
> char* temp;
>
> while ( ! feof( fp ) )
> {
> temp = fgets( line, line_size, fp );
> if ( temp == NULL )
> break;
>
> if ( strncasecmp( line, "vm", 2 ) == 0 )
> std::cout << " " << line;
> }
>
> fclose( fp );
> }
>
> int main(int, char**)
> {
> c4_Storage storage( "test.db", true );
> c4_View testview = storage.GetAs("test[id:I,name:S]");;
>
> c4_IntProp id("id");
> c4_StringProp name("name");
>
>
> while (1)
> {
> ShowMemoryInfo();
>
> int n;
>
> for (int i = 0; i < 10000; i++)
> {
> n = testview.Add( id[i] + name["Mr. Brown"] );
> }
>
> std::cout << "last added row was no. " << n << std::endl;
>
> if ( !storage.Commit() ){
> std::cout << "Error by Commit()" << std::endl;
> return 1;
> }
> }
>
> return 0;
> }
> //-------------------------------------------------
>
> I compile it using
>
> g++ -lmk4 main.cpp
>
> with gcc 3.2.2 and Metakit 2.4.9.3 on RedHat Linux 9.
>
> The output looks like this:
>
> VmSize: 2488 kB
> VmLck: 0 kB
> VmRSS: 968 kB
> VmData: 52 kB
> VmStk: 8 kB
> VmExe: 8 kB
> VmLib: 2364 kB
> last added row was no. 9999
> VmSize: 2968 kB
> VmLck: 0 kB
> VmRSS: 1384 kB
> VmData: 408 kB
> VmStk: 8 kB
> VmExe: 8 kB
> VmLib: 2364 kB
> last added row was no. 19999
> VmSize: 3472 kB
> VmLck: 0 kB
> VmRSS: 1644 kB
> VmData: 668 kB
> VmStk: 8 kB
> VmExe: 8 kB
> VmLib: 2364 kB
> last added row was no. 29999
> VmSize: 3768 kB
> VmLck: 0 kB
> VmRSS: 1648 kB
> VmData: 672 kB
> VmStk: 8 kB
> VmExe: 8 kB
> VmLib: 2364 kB
> last added row was no. 39999
> VmSize: 4284 kB
> VmLck: 0 kB
> VmRSS: 1772 kB
> VmData: 796 kB
> VmStk: 8 kB
> VmExe: 8 kB
> VmLib: 2364 kB
> last added row was no. 49999
> VmSize: 4844 kB
> VmLck: 0 kB
> VmRSS: 1844 kB
> VmData: 868 kB
> VmStk: 8 kB
> VmExe: 8 kB
> VmLib: 2364 kB
> last added row was no. 59999
>
> and goes on with increasing RSS and Data sizes forever. It looks like a
> memory leak to me.
>
> Am I doing anything wrong?
>
> Bernhard
> _____________________________________________
> Metakit mailing list - [EMAIL PROTECTED]
> http://www.equi4.com/mailman/listinfo/metakit
_____________________________________________
Metakit mailing list - [EMAIL PROTECTED]
http://www.equi4.com/mailman/listinfo/metakit
