Enhancement | Add trace logs for packet size (dotnet#2522)

Author: David-Engel

src/Microsoft.Data.SqlClient/netcore/src/Microsoft/Data/SqlClient/TdsParser.cs

@@ -2740,6 +2740,9 @@ private bool TryProcessEnvChange(int tokenLength, TdsParserStateObject stateObj,
                         // to MARS initialization!
                         int packetSize = int.Parse(env._newValue, NumberStyles.Integer, CultureInfo.InvariantCulture);
 
+                        SqlClientEventSource.Log.TryTraceEvent("{0}.{1} | Info | Server sent env packet size change of {2}, ClientConnectionID {3}",
+                            nameof(TdsParser), nameof(TryProcessEnvChange), packetSize, _connHandler._clientConnectionId);
+
                         if (_physicalStateObj.SetPacketSize(packetSize))
                         {
                             // If packet size changed, we need to release our SNIPackets since

src/Microsoft.Data.SqlClient/netfx/src/Microsoft/Data/SqlClient/TdsParser.cs

@@ -3182,6 +3182,9 @@ private bool TryProcessEnvChange(int tokenLength, TdsParserStateObject stateObj,
                         // to MARS initialization!
                         int packetSize = int.Parse(env._newValue, NumberStyles.Integer, CultureInfo.InvariantCulture);
 
+                        SqlClientEventSource.Log.TryTraceEvent("{0}.{1} | Info | Server sent env packet size change of {2}, ClientConnectionID {3}",
+                            nameof(TdsParser), nameof(TryProcessEnvChange), packetSize, _connHandler._clientConnectionId);
+
                         if (_physicalStateObj.SetPacketSize(packetSize))
                         {
                             // If packet size changed, we need to release our SNIPackets since

src/Microsoft.Data.SqlClient/src/Microsoft/Data/SqlClient/TdsParserStateObject.cs

@@ -1097,6 +1097,9 @@ internal bool SetPacketSize(int size)
                           (_outBytesUsed == _outputHeaderLen && _outputPacketNumber == 1),
                           "SetPacketSize called with data in the buffer!");
 
+            SqlClientEventSource.Log.TryTraceEvent("{0}.{1} | Info | State Object Id {2}, Setting packet size to {3}",
+                nameof(TdsParserStateObject), nameof(SetPacketSize), _objectID, size);
+
             if (_inBuff == null || _inBuff.Length != size)
             { // We only check _inBuff, since two buffers should be consistent.
                 // Allocate or re-allocate _inBuff.