Hi Régis
Le 08/02/2018 à 17:12, Régis Haubourg a écrit :
Hi René Luc,
thanks a lot for starting that analysis!
Do you plan to be in Madeira? Elaborating a complete test suite
together would be perfectly fitted for that task .
I could not be in Madeira. But we can discuss about perf test suite.
Some questions:
- Trust option is only there to not query datasource when this one has
no metadata for PK and extent. So it should only make sense to compare
the first getcapabilities or project load with and without trust
option. Other following requests should not have any impact, so we
need to make sure the platform is not measuring something else in the
differences you note. So I don't see what you mean by "completing" the
trust option. Can you be more explicit ?
Trust option can be usefull with Apache. When you use QGIS Server with
Apache, the QGIS Server processes are regularly reset. So the QGIS
Server cache is regularly cleaned, and the project is regularly
reloaded. So the trust option can affect all the request not only
GetCapabilities.
So the average time request is affected by trust option, but I was
thinking that this option make QGIS Server 3 faster at all scale and
it's not the case for high scale.
I have open an issue to request min,max, median requests time to have an
idea of the time needed to load project.
- Is the test platform requesting wms layer groups, and did you test
the multithread rendering? How many cores? How many cores really
available when testing?
The platform requesting layers, not layer groups and multithreading
rendering has been activated. the environnment variables are:
QGIS_SERVER_PARALLEL_RENDERING: "true"
QGIS_SERVER_MAX_THREADS: 8
I think we should first elaborate a common reference test suite and
couple a system monitoring at the same time to be sure we don't have
external noise in the tests, and find system bottlenecks. Then only we
can consider some conclusions over development priorities I think.
The platform provided by camptomcamp is a good start and some
enhancement has been already opened :
* test GetCapabilties
* test GetFeatureInfo
* test with labels
And we have multi options to test:
* with and without multithreading
* with and without local simplification (for postgres)
* with and without data projection (here form EPSG:4326 to EPSG:3857)
And we have other server configuration to test
* Nginx/Supervisor
* Embedding QGIS Server in Tornado or other Python server
Many thanks !
Régis
Regards,
René-Luc
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