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WBI_user · Posted: Wed Dec 05, 2001 1:23 pm Post subject:

MY customer is doing performance testing for MQSI.A message is sent with an initial expiry value through a 'request' message flow, it will then go through multiple hops in their MQ network with some processing and the final reply message will go a 'reply' message flow and end up in the reply queue.They want to find out where the time are spent end to end by inserting time stamps where possible.
One way to find the approximate end to end time is to look at the remaining expiry time when the message finally arrived on the reply queue. However because the message will expire, they have to check it on the reply queue before the message expire. This is not always possible.
They want to store the remaining expiry time in the database so that they can check it when they have time.
So the bottom line requirement is store the
Puttime and the expiry value of the MD in the first compute node after the message is picked up by the Input node in the "request' flow and to store the PutTime and Expiry in the first compute node after the message is picked up by the Input node of the "reply' message flow.
Before we do the database call, we want to see the output by just sending it to a queue.
Our output message flow is very simple with a single compute node which obtain the current time and the PutTime and the expiry time from the MD of the reply message.
Set OutputRoot.msg.pt=InputRoot.MQMD.PutTime; Set OutputRoot.msg.Et=InputRoot.MQMD.Expiry;
The output looks like
<msg><pt>..Timestamp</pt><Et>..Timestamp</Et></msg>
But we have 2 problems with the output
1. The expiry time is a timestamp instead of the actual expiry value. This is documented in the manual after we read the book.
2. The time stamp for the PutTime inside the output XML message is not accurrate. It is after the putTime of the output message when I use MQ EXplorer to look at the message on the Output queue. I know that they should be different because the final MQPUT to the output queue is after the compute node. So it should be before the PutTime of the Output message, not after.
Can some one help me to understand this and provide some suggestion on how I can get the right Expiry time (most important) and the PutTime (secondary important) so that I can store them in the database for analysis.