Dear Gabriel,
Maybe could you say a few words about the GWC controlflow mechanism?
Thanks a lot,
Ben
2015-09-24 10:40 GMT+02:00 Andrea Aime <[email protected]>:
> On Wed, Sep 23, 2015 at 2:46 PM, Simó Benedek <[email protected]>
> wrote:
>
>> Ok, now it seems more clear! So the Tomcat maxThreads number has to be
>> higher than the ows.gwc parameter in controlflow.properties, right? Or it
>> has to be more than the sum of ows.wms and ows.gwc?
>>
>
> Higher than the sum I'd say.
>
>
>>
>> And will the ows.gwc parameter affect request to the wms endpoint with
>> tiled=true instead of the gwc endpoint?
>>
>
> Yes and no, it's more complicated than that. If your request has
> tiled=true _and_ it matches exactly, by location, format and request
> parameters,
> a tile that can be cached by GWC, and the direct WMS integration in the
> GWC config panel is enabled, then GWC takes it over and may be
> limited by the GWC limits, otherwise it's a normal WMS request and it gets
> handled by the WMS.
> Hope this makes sense.
>
> And oh, I did not code the GWC control flow limits myself, so the above
> might be incorrect, and it might be that GWC limits kick in only
> if you are using the real tile protocols (WMTS and friends).
> I'm cc'ing Gabriel, maybe he knows how things actually work.
>
>
>>
>> And I also wonder if one counts with the number of CPU cores in this
>> case, is it the phísical or the logical cores? (Sorry if this is a dumb
>> question...)
>>
>
> Not dumb, I always wonder myself. The extra cores HT give are only useful
> for integer number computations, but not for float ones (as far as I know).
> I don't have a good answer here, gut feelilng, I'd take the physical ones
> and multiply by four.
> If you want to have a "real" number instead, load test your server with
> increating number of parallel requests, with no limits, and
> record when you get the maximum throughput, that's likely the number you
> want to set in control-flow
>
> Cheers
> Andrea
>
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