Call for vote on MS-RFC-28: LOG/DEBUG output mechanism

[Daniel Morissette]

Jeff McKenna wrote:
> 
> As one of those users similar to Ed, I'm constantly looking at DEBUG 
> messages in layers/maps for performance.  Sometimes (like my sample 
> debug output below) the messages are not that useful, showing only a few 
> layer's drawing time and the total time.  So if RFC#28 improves the 
> output, I'm all for it.
> 
>   msDrawMap(): Layer 0 (Ontario_Landcover), 0.141s
>   msDrawMap(): Layer 1 (Conservation_Area), 0.000s
>   msDrawMap(): Layer 2 (Provincial_Parks), 0.000s
>   msDrawMap(): Layer 3 (National_Parks), 0.000s
>   msDrawMap(): Layer 4 (Municipal_Boundary), 0.000s
>   msDrawMap(): Layer 5 (Municipal_Boundary_Lower), 0.00
>   msDrawMap(): Layer 6 (Geographic_Lot_Fabric), 0.000s
>   msDrawMap(): Layer 7 (Geographic_Township), 0.000s
>   msDrawMap(): Layer 8 (NTS_Railway), 0.031s
>   msDrawMap(): Layer 9 (DMTI_Major_Roads), 0.000s
>   msDrawMap(): Drawing Label Cache, 0.000s
>   msDrawMap() total time: 30.406s
> 

This is what you get if you only set DEBUG ON at the map level. If you 
set DEBUG on in some (or all) layers as well then you'll get more info 
specific to each layer. What kind of info you get in this case depends 
on each layer type.

I'm not planning to spend lots of time adding more debug output right 
away, but this RFC will definitely set the bases for better and more 
useful timing and debug info. If there are specific timings or debug 
info you'd like to see you're welcome to file enhancement tickets about 
them. If they can be added easily then I'll be happy to add them.

Note that in your output above the total time is 30.406s but the 
individual layer times are much less than that. Is this a real output or 
did you edit it? I wonder where the difference comes from. I think 30 
seconds is the default timeout for WMS connections, did your map include 
a WMS layer that timed out by any chance? You'd get some useful debug 
info by setting DEBUG ON in that WMS layer.

Daniel
-- 
Daniel Morissette
http://www.mapgears.com/