Zen of WCF Performance and Scale

re: Zen of WCF Performance and Scale

Jesse Ezell — Thu, 02 Oct 2008 18:03:20 GMT

I'm certainly looking forward to this talk

WCF Perf Talk @ PDC (or, the Doctor Teaches Fishing)

Matt W's Windows Workflow Place — Thu, 02 Oct 2008 20:06:55 GMT

I'm probably not going to have too much time to attend talks at PDC, but one talk that would be high

re: Zen of WCF Performance and Scale

Bijan — Thu, 02 Oct 2008 20:54:51 GMT

I have an open question on MSDN forums:

https://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=1781408&SiteID=1

Regards,

Bijan

re: Zen of WCF Performance and Scale

David Barrett — Fri, 03 Oct 2008 00:50:04 GMT

I'm trying to track down a phenomenon I'm seeing.

I have a service that maintains duplex callback channels to clients that are connected via nettcp. On scaling out the number of clients, the callback takes, on average, more and more time per call (I'm testing pub/sub to more and more subscribers). The messages are small, I'm not bandwidth-limited, and I'm not CPU-limited. I'm assuming there is something being syncronized inside WCF, but can't determine if that's the issue, or what it is. I can profile the code, and isolate the latency to the callback call increasing in some ratio with the number of subscribers. Both the service and callback behaviors are declared multi-threaded. UseSyncContext is also set to false (although, in this case, I don't think anything is being provided anyway).

I won't be at PDC (boohoo), but I'm hoping you can comment here briefly before/after PDC, or I'll be able to see the recording after. Thanks, Nicholas!

re: Zen of WCF Performance and Scale

David Barrett — Fri, 03 Oct 2008 00:52:49 GMT

P.S. -- Regarding the previous scale-issue with multiple subscribers, I've got reliable and ordered messaging turned off on the binding. Just FYI.

re: Zen of WCF Performance and Scale

flalar — Fri, 03 Oct 2008 09:11:22 GMT

for us not attending PDC. Are you going to be blogging about section two and three before or after the conference?

re: Zen of WCF Performance and Scale

Nicholas Allen — Fri, 03 Oct 2008 11:06:39 GMT

Hi David and flalar,

I will make the content in the slides available some time after PDC. I don't know how accessible the PDC staff are planning to make the recordings of the talk.

Scaling a Talk

Nicholas Allen's Indigo Blog — Sat, 25 Oct 2008 02:46:28 GMT

As I mentioned a few days ago, we were tweaking the published details of my talk a bit to better reflect