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kash3338
PostPosted: Thu Aug 04, 2011 5:37 am    Post subject: MQHeader Node usage Reply with quote

Shaman

Joined: 08 Feb 2009
Posts: 709
Location: Chennai, India
Hi,

I have a flow wherin I need to modify few MQMD values and not all. What is the best way to do this? Can I do this using the ESQL code or use a MQHeader Node?

Is there any performance issue on adding an extra node to my flow instead of doing in ESQL?

Normally, is there any performance issue if I add a node instead of doing in ESQL? Like MQHeader node or the RCD node?
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Vitor
PostPosted: Thu Aug 04, 2011 5:53 am    Post subject: Re: MQHeader Node usage Reply with quote

Grand High Poobah

Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
kash3338 wrote:
What is the best way to do this? Can I do this using the ESQL code or use a MQHeader Node?


If it's just the MQMD, with no requirement for a Compute node before or after, then a MQHeader node seems the choice. If there is a Compute node someplace I'd put the code in there rather than add a logically unnecessary node. There's a fair amount of personal preference in that view though.

kash3338 wrote:
Is there any performance issue on adding an extra node to my flow instead of doing in ESQL?


IMHO I don't see the MQHeader node having a lot of overhead.

kash3338 wrote:
Normally, is there any performance issue if I add a node instead of doing in ESQL? Like MQHeader node or the RCD node?


Depends entirely on the situation and what the node is doing. The RCD node can have a very small footprint. Or it can cause WMB to completely reparse the message tree. Likewise a badly written Compute node can be outperformed by a MQH or RCD.

You can't generalise into "extra nodes bad" or "extra nodes good".
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