Webservice performance decrease after technical update

SonGoten13

Hi,
I am using Webservices for different communication between 2 classic client databases. They were on R2 Build 6.0.32365.
After an technical update to 6.0.33639 i experience a decrease in performance. I dont have numbers, but they are noticeable slower.
Anyone an idea?

greetings

David_Singleton

The first step would be to identify if the issue is SQL or the Middle tier. Have a look at queries from the old version and the new version and see if they changed.

Assuming of course that nothing else changed.

deV.ch

Don't know if you're aware of it but on any restart of a webservice or service tier on the first run you experience slow performance, this gets better any execution, this is due to caching & Compilation of metadata and c# code, that must be done first.
Have you done performance testing after a "warmup" ?

SonGoten13

thx for your responses
@David: Well i have no queries saved from the old version, and as far as i know it is not possible to reverse a technical update when there was a database conversion, or?
@deV.ch: Yeah i heard that, but never experienced a noticeable difference after an warmup phase before. I tried it now again, and when executing the same webservice(with different parameters) around 500 times counts as warmup, then it has nothing to do with it.

But it got already(today i tried around a little bit more) again a bit faster since last week when i first discovered it. Maybe the Server just hat a bad day, i don't know ^^
Gonna have to monitor it a little bit longer (its not in an production environment yet).
Comments are anyway appreciated.

greetings

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Update 01.2015: some time ago already, but as surprisingly as the problem came up it also went away, no idea why though