Question

I have an app that use collections of objects an is really fast.
Now, I am adding a database for persitancy, so I started to save things in SQLite database.

But now i found is much much slowly.
I think it is because the disk is slower than ram. it possible to have the DB in memory?
I found an Inmemory DB in the documentation of SQLite, but it is in memory and I need persitancy.

So, is it possible to have the DB in memory for perfoamnce and save to the disk after some time?

Thank you and regards.

Update:

In the answers they say that it is because I am doing lots of inserts, and this is true. They say I should make a bulk insert.

My code looks like this in a memory collection called Computers:

foreach (line in lines)
{
Computers.Add(new Computer { ComputerName = line});
}

Now in the DB:

    foreach (line in lines)
    {
string sql = "INSERT into computers VALUES ('"+computerName+"')";
SQLiteCommand command = new SQLiteCommand(sql, dbConnection);                            command.ExecuteNonQuery();
    }

How can I do this in a single bulk insert?

Answer 1

You can use the Backup API to accomplish this. See http://www.sqlite.org/backup.html A complete code sample in C is provided.

If you are doing lots of inserts at once, make sure you combine them in a single transaction. Otherwise SQLite waits one disk rotation for each insert, which can greatly slow down the insertion process. Doing this may allow you to use a disk-based SQLite database, without the slowdowns.

See Also
SQLite Insert very slow?