On Mar 4, 2008, at 1:20 PM, Mike Schrag wrote:
- Maximum Adaptor Threads is 512
Increasing this correlates to increasing incoming connections to
the HTTP server.
That seems waaay to high. If WO creates more than 16 or so worker
threads, it will have a hard time recovering without the users
getting timeout messages.
Max had some really good info on all these values in the WO
scalability session from a few WWDC's ago ... He talked about how
the defaults are actually really terrible and will make your app
fall over under load. Does anyone have their notes from that? It
was really useful info that's hard to find anywhere else.
I do someplace. If only I could find it... IIRC he said about 7-8
worker threads and 2-3 listen queue ones. Of course that depends on
your app and what average requests are doing etc etc. But above that
limit, if the app slows, the requests pile up to where it has no hope
of meaningful recovery (the app may recover, but the users have gotten
an error message long before).
Chuck
--
Practical WebObjects - for developers who want to increase their
overall knowledge of WebObjects or who are trying to solve specific
problems.
http://www.global-village.net/products/practical_webobjects
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