private unsafe int GetOverflowPageHeaderSize()
{
if (((int)_openFlags & (int)LMDBEnvironmentFlags.WriteMap) == 0)
{
throw new InvalidOperationException("OverflowPageHeaderSize requires DbEnvironmentFlags.WriteMap flag");
}
using (var txn = BeginTransaction())
{
GCHandle handle;
try
{
var db = new Database("temp", txn._impl, new DatabaseConfig(DbFlags.Create));
var bufferRef = 0L;
var keyPtr = Unsafe.AsPointer(ref bufferRef);
var key1 = new DirectBuffer(8, (nint)keyPtr);
var value = DirectBuffer.LengthOnly((uint)PageSize * 10);
db.Put(txn, ref key1, ref value, TransactionPutOptions.ReserveSpace);
db.Dispose();
return(checked ((int)(((IntPtr)value.Data).ToInt64() % PageSize)));
}
finally
{
txn.Abort();
}
}
}
public unsafe void SimpleWriteReadBatchedBenchmark()
{
#pragma warning disable 618
Settings.DoAdditionalCorrectnessChecks = false;
#pragma warning restore 618
var count = TestUtils.GetBenchCount(TestUtils.InDocker ? 100_000 : 1_000_000, 100_000);
var rounds = 10;
var extraRounds = 10;
var path = "./data/benchmarkbatched";
if (Directory.Exists(path))
{
Directory.Delete(path, true);
}
var dirS = Path.Combine(path, "Spreads");
var dirK = Path.Combine(path, "KdSoft");
Directory.CreateDirectory(dirS);
Directory.CreateDirectory(dirK);
var envS = LMDBEnvironment.Create(dirS, LMDBEnvironmentFlags.MapAsync, disableAsync: true);
envS.MaxDatabases = 10;
envS.MapSize = 256 * 1024 * 1024;
envS.Open();
// envS.TouchSpace(100);
Console.WriteLine("USED SIZE: " + envS.UsedSize);
var dbS = envS.OpenDatabase("SimpleWrite", new DatabaseConfig(DbFlags.Create | DbFlags.IntegerKey));
for (int i = 0; i < 2; i++)
{
using (var txn = envS.BeginTransaction(TransactionBeginFlags.NoSync))
{
var key = 0L;
var keyPtr = Unsafe.AsPointer(ref key);
var key1 = new DirectBuffer(TypeHelper <int> .FixedSize, (nint)keyPtr);
var value = DirectBuffer.LengthOnly(32 * 1024 * 1024);
dbS.Put(txn, ref key1, ref value, TransactionPutOptions.ReserveSpace);
txn.Commit();
}
using (var txn = envS.BeginTransaction(TransactionBeginFlags.NoSync))
{
var key = 0L;
var keyPtr = Unsafe.AsPointer(ref key);
var key1 = new DirectBuffer(TypeHelper <int> .FixedSize, (nint)keyPtr);
dbS.Delete(txn, ref key1);
txn.Commit();
}
}
// var garbage1 = new byte[1];
for (int r = 0; r < rounds; r++)
{
using (Benchmark.Run("Spreads Write", count, false))
{
var tx = envS.BeginTransaction();
// using (tx)
{
for (long i = r * count; i < (r + 1) * count; i++)
{
dbS.Put(tx, i, i, TransactionPutOptions.AppendData);
if (i % 10000 == 0)
{
tx.Commit();
tx.Dispose();
tx = envS.BeginTransaction();
}
}
tx.Commit();
tx.Dispose();
}
}
using (Benchmark.Run("Spreads Read", count * extraRounds, false))
{
using (var tx = envS.BeginReadOnlyTransaction())
{
for (long j = 0; j < extraRounds; j++)
{
for (long i = r * count; i < (r + 1) * count; i++)
{
dbS.TryGet(tx, ref i, out long val);
if (val != i)
{
Assert.Fail();
}
}
}
}
}
}
dbS.Dispose();
envS.Close();
Benchmark.Dump("SimpleBatchedWrite/Read 10x1M longs");
// Console.WriteLine(garbage1[0]);
}