2009SP1 Webservices slow response on first request

kfuglsang

Hi all,

I have been developing a test solution based on the 2009 SP1 webservices. My findings are, however, that the first request to the webservices takes about 5 seconds to get a response no matter the response size. Any subsequent request is finished relatively quickly (means reasonably, what I would expect).

The webservices is requested through a .net application. If I let an amount of time, say 20 minutes, pass it will take 5 seconds to do the first request again.

Regarding this, I think it would be very interesting to know if anyone else has experienced this?
Any ideas to how I can avoid this "initialization time"?

kine

I know this behavior from IIS applications, where the worker process is killed after given time (I think that 20 minutes is default). It looks same for WCF. But I do not know how to set this in WCF... (similar problem like e.g. there: http://www.netframeworkdev.com/windows- ... 3818.shtml)

kfuglsang

Sounds correct yes.

I will check tomorrow if I can find a way to tweak the recycling settings for the NAV webservices, although I have a feeling they might be hidden pretty well

kine

As workaround you can use some scheduler to run some call for the webservice in given period to just keep the webservice "warm".

Jens_M-P

The webservice will reuse a previously used connection if another request for the same user comes in within a given time period (in 2009 SP1). As far as I remember this period is set to 10 seconds.
The main reason for reusing the connection is that the database connection then does not need to be re-established.

Hope this helps.

kfuglsang

Unfortunately it doesnt really help.

The application isn't much loaded given the nature of it, so each user will get the experience that it opens very slowly.

I have created a small vb-script to query the webservice every 10 minutes, but to be honest I hope another solution will appear.