Hi Peter,

Strange - "automatic session handling" and "reuse context (4D keeps the values 
of the variables, good for testing)" are the first things I turn off. Same for 
"keep a live", I turn it off.

I'd create some spare web processes (there is a DB settings for this). You 
didn't lower the stack size anywhere, did you? If you are using nightly builds, 
use a fresh more recent one to avoid the funny web things which popped up 
lately.

Greetings,
Peter
  _____  

From: Peter Jakobsson [mailto:[email protected]]
To: Active4D Developer Discussion List [mailto:[email protected]]
Sent: Wed, 05 Nov 2014 22:47:14 +0100
Subject: Re: [Active4d-dev] v14 Crashing Issue (Detected)


  Hi
  
  I seem to have got to the bottom of this. The issue is with v13’s new 
“Automatic Session Management” property. With this switched on, performance is 
amazingly silky smooth and stable (compared with v12). With “Automatic Session 
Management” off, it is jerky and unstable.
  
  In particular, 2 adverse conditions prevail when this feature is switched off:
  
  [1] - under moderate loads, every 4th or 5th request “locks up”
  
  [2] - if the “Reuse Temporary Contexts (in remote mode)” feature is active 
and traffic dwindles to the point that some web processes expire due to 
timeout, the web server will crash when it next receives a request
  
  Just so happens that this exactly corresponds to a typical Active4D 
configuration (since we’ve had automatic session management since the dinosaurs 
walked the earth).
  
  In upgraded databases, the feature is off by default. In v14 native ones, 
it’s on by default which explains why upgraded ones exhibit the acute 
condition. In particular:
  
  **** Upgraded Structure Defaults *****
  
  Auto Session Man: Off
  Web Process Timeout: 5 minutes - 1 hour
  
  **** v14 New Structure Defaults *****
  
  Auto Session Man: On
  Web Process Timeout: 8 hours
  
  Hopefully this can get addressed before 14.3 is out. I’ll report it on the 
beta forum.
  
  Peter
  
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