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Out of memory when creating a lot of objects C#

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醉梦人生
醉梦人生 2020-12-18 21:26

I\'m processing 1 million records in my application, which I retrieve from a MySQL database. To do so I\'m using Linq to get the records and use .Skip() and .Take() to proce

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  • 自闭症患者
    自闭症患者 (楼主)
    2020-12-18 21:35

    Ok I've just discussed this situation with a colleague of mine and we've come to the following solution which works!

    int amountToSkip = 0;
var finished = false;
while (!finished)
{
      using (var dataContext = new LinqToSqlContext(new DataContext()))
      {
           var objects = dataContext.Repository().Skip(amountToSkip).Take(250).ToList();
           if (objects.Count == 0)
                finished = true;
           else
           {
                foreach (Object object in objects)
                {
                    // Create 0 - 4 Random Items
                    for (int i = 0; i < Random.Next(0, 4); i++)
                    {
                        Item item = new Item();
                        item.Id = Guid.NewGuid();
                        item.Object = object.Id;
                        item.Created = DateTime.Now;
                        item.Changed = DateTime.Now;
                        dataContext.InsertOnSubmit(item);
                     }
                 }
                 dataContext.SubmitChanges();
            }
            // Cumulate amountToSkip with processAmount so we don't go over the same Items again
            amountToSkip += processAmount;
        }
}



    With this implementation we dispose the Skip() and Take() cache everytime and thus don't leak memory!
    
    
    
             
    
                                                        
    
            
            
    
              
                
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