Question

I am executing below C# code –

for (; ; )
{
    Console.WriteLine("Doc# {0}", ctr++); 
    BsonDocument log = new BsonDocument();
    log["type"] = "auth";
    BsonDateTime time = new BsonDateTime(DateTime.Now);
    log["when"] = time;
    log["user"] = "staticString"; 
    BsonBoolean bol = BsonBoolean.False;
    log["res"] = bol;    
    coll.Insert(log);
}

When I run it on a MongoDB instance (version 2.0.2) running on virtual 64 bit Linux machine with just 512 MB ram, I get about 5k inserts with 1-2 faults as reported by mongostat after few mins.

When same code is run against a MongoDB instance (version 2.0.2) running on a physical Windows machine with 8 GB of ram, I get 2.5k inserts with about 80 faults as reported by mongostat after few mins.

Why more faults are occurring on Windows? I can see following message in logs-
[DataFileSync] FlushViewOfFile failed 33 file

Journaling is disable on both instances

Also, is 5k insert on a virtual machine with 1-2 faults a good enough speed? or should I be expecting better inserts?

Answer 1

Looks like this is a known issue – https://jira.mongodb.org/browse/SERVER-1163