receive top 20

HI

I am trying to set up a stored procedure to retrieve to 20 messages from a queue into a table to implement a batched process. I have the following code in a stored procedure.

WAITFOR (
RECEIVE top (20) -- get batched so that we can process same listid once
message_type_name,
message_body, -- the message contents
conversation_handle -- the identifier of the dialog this message was received on
FROM dbo.target
into @PayloadData
), TIMEOUT 3000 -- if the queue is empty for three second, give UPDATE and go away

However, the stored procedure is only retrieving 1 message at a time from the queue. Did I miss some other setting

thanks

P

Hi

so, in your blog on T-SQL RECEIVE. Fast. : Set based Processing.

How are you able to receive the message in bulk Is it because of the way you send the message in LoadQueueReceivePerfBlog

one follow up,

when I send the message using the same conversation handle, the receive top (20) statement waits until the previous batch is committed before it will start retrieving the next 20. I guess this is because of the its now part of the same conversation group and service broker need to guarantee process order

This is what my proc looks like

WAITFOR (

RECEIVE top (20) -- get batched so that we can process same listid once

message_type_name,

message_body, -- the message contents

conversation_handle -- the identifier of the dialog this message was received on

FROM dbo.target

into @PayloadData

), TIMEOUT 3000 -- if the queue is empty for three second, give UPDATE and go away

if "-- do some processing of the records in @PayloadData" is taking a long time, its going to block the messages in the queue.

If I remove the begin and commit transaction block, it only wait for the 3 seconds I specified.

Question: is the transaction block necessary in the activated procedure.

thanks

Paul