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MQSeries.net Forum Index » WebSphere Message Broker (ACE) Support » Slow First Request - for Http Input Node.

Slow First Request - for Http Input Node.

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wilsonjohn24

Posted: Mon Jul 07, 2008 1:50 am Post subject: Slow First Request - for Http Input Node.

Voyager

Joined: 02 Feb 2007
Posts: 93
Location: Scotland

Hi,

Have a scenario in which a flow is doing http -> transform -> MQ.

However on first request ( or request after a period of no activity - about 10 mins ) it takes on average 1 second longer. In our production scenario - this is not acceptable.

It seems to be the biphttplistener that has an overhead- as when we run a MQ -> transform-> MQ we dont have the issue.

I appreciate that it is good working practices to "move out" components that have not been accessed in X seconds. But in this situation I need to keep this in an always active state.

Any help appreciated in tweaking biphttplistener?

thanks in advance

John

sridhsri

Posted: Mon Jul 07, 2008 11:02 am Post subject:

Master

Joined: 19 Jun 2008
Posts: 297

I found this information in a developerWorks article. I am not sure if this will help you:

There is a configurable property called maxKeepAliveRequests that specifies how many requests can be send down a single connection.

The default Message Broker value is 100. Therefore, when an HTTP client connects, it can send 100 requests before Message Broker issues a Connection: close and closes the socket. The next request the client sends creates a new socket and again can send up to 100 requests. In many environments this setting may be enough. But when maximum throughput is required, you may need to set this value higher or make it unlimited, in order to achieve the desired throughput.

Here is the command: mqsichangeproperties MyBroker -b httplistener -o HTTPConnector -n maxKeepAliveRequests -v 0

It is supported only when you select HTTP 1.1

You will find more information at: http://www.ibm.com/developerworks/websphere/library/techarticles/0608_braithwaite/0608_braithwaite.html

wilsonjohn24

Posted: Tue Jul 15, 2008 2:30 am Post subject:

Voyager

Joined: 02 Feb 2007
Posts: 93
Location: Scotland

thanks for that,.;...

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