I'm running 22.214.171.124 on a customer site and I'm seeing this in the logs quite a lot
HTTP flows workload overran the MAX limit (2000), 18 flows haven't been accelerated since [THU MAY 27 12:44:23 2010
I'm guessing this the amount of resources dedicated to HTTP flows on the box. I think I've identified the root cause of the issue (the WX attempting to proxy flows to a proxy server in the data centre), I've now factored that out of the policy so the WX should only try and do a full Layer 7 Proxy to intranet sites but it strikes me that this default pool size is quite small, especially given that I've only got a 512k pipe and the WX itself doesn't seem to be under any stress (sh oyo spy). If the max flows on a WXC1800 is in fact 64k and I'm no-where near that limit, is there anyway I can increase the flow pool the same way I can with CIFS acceleration? I've had a look in the usual places but can't find any evidence.
You are right about the resource allocation. WXC1800 can only accelerate 2000 concurrent http flows. Any flows afterwards will not be application accelerated. By default this log message should appear every 10 minutes with an entry of how many flows are not getting http acceleration.
I can do a query and find out if there is a way of increasing that resource allocation if you like. But being part of testing the http acceleration from the begining, I don't recall a way to do it through cli unless it is hidden.
Hope that helps.
SRX Global JTAC
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I would have thought that 2000 concurrent sessions a bit low on a small branch box such as the 1800, but to be the limit on all platforms is frankly incredible, especially when there are resources to spare?? If I've bust through that limit already, the module must be turned off in most implementations?
Having a branch site with this many flows is I think quite exceptional, even if you assume the customer is using Firefox/IE7-8 and each browser session can have say 6 flows this equates to over 300 users at a branch and as the maximum circuit size of the WXC1800 is 2MB that adds to IMHO to be even more unrealistic.
Danny Jump Technical Marketing Manager - Access and Acceleration Business Unit
Additionally, some webpages (Google Maps) and even SSL sites (online.lloydstsb.co.uk) request many TCP sessions/connections. When I open http://maps.google.com on my Windows XP laptop via Firefox, it results in 21 extra TCP sessions (verified via "netstat -p tcp" before and after opening Google Maps).