Internal Activation Questions

Hi All,

First time, I setup Internal Activation for two stored procedures. One, inserts one or more records , the other, updates one or more records in the same table. So, I have two initiator, two target queues. It works fine on development so far, but I wonder what types of problems I might encounter when we move it to prod where these two stored procedures are frequently called. We have already experiencing deadlock issues caused by these two stored procedures. Asynchronous execution is my main goal this this implementation.

Q1) Is there a way to use one target queue for both stored procedures to prevent any chance of deadlocks?

Q2) Is there anything I can do to make it more reliable? like one execution error should not stop incoming requests to the queue?

Q3) Tips to improve scalability (high number of execution per second)?

Q4) Can I set RETRY if there is a deadlock?

CREATE PROCEDURE [dbo].[usp_AddInstanceUsers] 
  @UsersXml xml
AS 
BEGIN
    DECLARE @Handle UNIQUEIDENTIFIER;

    BEGIN DIALOG CONVERSATION @Handle
    FROM SERVICE [RecordAddUsersService]
    TO SERVICE 'AddUsersService'
    ON CONTRACT [AddUsersContract]
    WITH ENCRYPTION = OFF;

    SEND ON CONVERSATION @Handle 
    MESSAGE TYPE [AddUsersXML](@UsersXml);
END
GO
CREATE PROCEDURE [dbo].[usp_SB_AddInstanceUsers] 
AS 
BEGIN
    DECLARE @Handle    UNIQUEIDENTIFIER;
    DECLARE @MessageType SYSNAME;
    DECLARE @UsersXML  XML;

	WHILE (1=1)
	BEGIN
		BEGIN TRANSACTION;
		WAITFOR
		(RECEIVE TOP (1) 
			@Handle		 = conversation_handle,
			@MessageType = message_type_name, 
			@UsersXML	 = message_body
		FROM [AddUsersQueue]), TIMEOUT 5000;
		IF (@@ROWCOUNT = 0)
		BEGIN
 ROLLBACK TRANSACTION;
 BREAK;
		END
		IF (@MessageType = 'ReqAddUsersXML') 
		BEGIN
--<INSERT>....
		DECLARE @ReplyMsg NVARCHAR(100);
		SELECT  @ReplyMsg = N'<ReplyMsg>Message for AddUsers Initiator service.</ReplyMsg>';
		SEND ON CONVERSATION @Handle
		MESSAGE TYPE [RepAddUsersXML] (@ReplyMsg);
		END
		ELSE IF @MessageType =	N'http://schemas.microsoft.com/SQL/ServiceBroker/EndDialog'
		BEGIN
  END CONVERSATION @Handle;
		END
		ELSE IF @MessageType =	N'http://schemas.microsoft.com/SQL/ServiceBroker/Error'
		BEGIN
  END CONVERSATION @Handle;
		END
		COMMIT TRANSACTION;
	END
    END
GO
CREATE QUEUE   [RecordAddUsersQueue];
CREATE SERVICE [RecordAddUsersService] ON QUEUE [RecordAddUsersQueue];

ALTER QUEUE [AddUsersQueue] WITH ACTIVATION 
(     STATUS = ON,
      MAX_QUEUE_READERS = 1,
      PROCEDURE_NAME = usp_AddInstanceUsers,
      EXECUTE AS OWNER);

Thanks,

Kuzey