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Linq and higj use of memory

Posted on 2011-02-23
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Last Modified: 2012-05-11
Hello,

   I`ve writtern the code above and when I try upload more than 100K records the RAM goes from 2.7G to to 6G. Is the garbage collection not working well? Is my cod ewrong? I can't dispose the objects...

  Thanks,
  Marco Castro
foreach (var item in entity.LinqQuery.ToList()))
{
  OLAP_VENDAS olapv = new OLAP_VENDAS();
  olapv.VENDAS = new Misc().GenID("OLAP_VENDAS");
  olapv.VENDAS_CABECALHO = olap.VENDAS_CABECALHO;
  olapv.QT_CONSIG = item.EnvioConsignacao;
  try
  {
    entity.AddObject(olapv.GetType().Name, olapv);
    if (i++ > 500)
    {
      entity.SaveChanges();
      // It connects to the database again
      entity = ActiveEntity.GetEnt();
      i = 0;
    }
   }
   catch (Exception e)
   {
      throw new FaultException<FaultContract>(new FaultContract(e.ToString()));
    }
}

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Question by:MarcoCastro
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Expert Comment

by:crysallus
ID: 34966620
Your logic with the i variable in the if statement looks bad to me. By resetting i to 0, it's never reaching 500 (assuming it's not initialised to a value above 500, which you've left out of the code sample), which is an infinite loop, which would be why your memory is spiralling out of control.

You might want to explain what your code is supposed to be doing, as that might make it easier to help you. Without that, I can't really offer you alternatives.
0
 

Author Comment

by:MarcoCastro
ID: 34969139
Hi, the i variable is not a problem (it is i++, so it is incremented). The reason of i is: load 500 AddObject and then save them in a single process. It is to make the process as fast as possible.

The code is intended to transfer a huge amount of data from one table to another. I can`t do it directly in the database because my LinqQuery if populated by a Dot.Net routine. After populated its content is transfered to a table in the SQL FireBird. So, for each record in LinqQuery one new object is the created as an entity and saved in the database.

thanks,
Marco Castro
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Accepted Solution

by:
MarcoCastro earned 0 total points
ID: 34991704
The answer is: detach all created objects.
0
 

Author Closing Comment

by:MarcoCastro
ID: 35034603
I got the answer by myself.
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