BizTalk memory behavior

Recently, as my application grew; the memory consumption of the bts service host had increased notably. We've looked to mitigate these effects by switching to "presumably less-consuming adapters" such as wcf. We've changed the variable/messages within the scopes hoping that this will decrease the memory consumption as well. Nothing seems to have worked.

In first instance, almost any orchestration get the memory on the loose, (400Mbs and so); so, as a consequence the system began to throttle due to the lack of system memory condition. If we cut the throttling lock, by setting to 0, the service will inevitable crash due to "sytem.outofmemoryex".

We use the sql adapter as well, we use maps that are not so complex, some are xslt inlined, some are direct linking, some are using external xslts.Our scopes a few of them are transactional, other are set to non-transactional, they are just catching exceptions.

So, the question is, what shapes are highly memory consumption, what recommendations are usually referred to avoid these high memory ?

* Using BTS2006R2.

Hi,

The first thing to do is try to find the specific component(s) (pipeline, adapter, orchestration, etc) that take so much memory. You can do this by using multiple hosts and assign different parts of your application to different hosts

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Shaalini.S
Be the Best of Whatever you are...

Hi,

I tried to isolate this issue on the simplest orchestration, which only includes an interaction with an outside webservice published through the internet. Initially, we used the SOAP adapter but gradually changed to WCF-Custom adapter; now all ports are set to use this adaoter. Well, we changed some maps to perform using xslt only, no direct binding in the mapper by itself, to discard possible negative effects inducted by the mapper. The schema is part of a multipart message that was created through the web service discovery so a proxy was created to download all these schemas. It is a kind-of complex schema, it is long, BUT we use only like 15% of the whole schema.

So, here is my next question, memory-wise, what happens when we map complex schemas but you're not using the whole thing ? I've read about some properties, used commonly in the HL7, that is "GenerateDefaultFixedNodes", I tried by setting to "NO" in my original map, however was no use at all (same thing happened). By changing to xslt maps, the issue may disappear but there is still where you receive the response message (which is a message part of the complex schema).

Hi,

How much memory does the server have? Maybe it has too little memory for what your processing requires and you need to give it more memory. It isn't very difficult for a BizTalk host to use 400mb of memory if it is processing a lot of messages and orchestrations at the same time.

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A.Rajesh Khanna