Dear Graham, First of all thanks for such a great work and the invaluable support. I definitely is very interested in being able to get the metrics from my webpage using mod_wsgi. Is there any documentation on this aspects?
Thanks! Best regards, Jian > Den 14. maj 2021 kl. 06.28 skrev Graham Dumpleton > <[email protected]>: > > A pretty picture as promised of the sort of metrics you can get out of this > new mod_wsgi version without too much effort. > > <PastedGraphic-1.png> > > In this case the change in throughput part way was a result of a switch from: > > mod_wsgi-express start-server wsgi.py --disable-reloading > --queue-timeout=0 > > to: > > mod_wsgi-express start-server wsgi.py --processes=1 --threads=1 > --embedded-mode > > If you have a serious interest in collecting metrics let me know and I can > provide more details. > > Graham > >> On 14 May 2021, at 2:12 pm, Graham Dumpleton <[email protected] >> <mailto:[email protected]>> wrote: >> >> I finally got off my butt and have made a new mod_wsgi release. Version >> 4.8.0. >> >> Details in: >> >> https://modwsgi.readthedocs.io/en/master/release-notes/version-4.8.0.html >> <https://modwsgi.readthedocs.io/en/master/release-notes/version-4.8.0.html> >> >> Highlights are it is faster and shinier. >> >> Seriously, it is faster. >> >> Or to put it another way I was able to tune out some of the overhead around >> Python global interpreter locking and so for certain classes of applications >> you may see lower overheads and potential for greater throughput. This isn't >> going to apply to all applications because I/O bound applications aren't >> going to benefit as much, and overly CPU bound applications just overload >> the whole system anyway. >> >> In addition to that, have made some tweaks to how some of the daemon mode >> options work and when a specific combination of options are used (with loss >> of those features though), you can reduce those overheads and increase >> throughput even more. >> >> But wait, there is more. If you really want to show off and don't need the >> reliability protections that daemon mode is providing when using the >> mod_wsgi-express default configuration, then you can now with >> mod_wsgi-express switch to embedded mode. This can be used to dramatically >> increase potential throughput, but does mean your application needs to be >> very robust and not prone to hanging or other things which daemon mode can >> automatically help recover from when set up correctly as mod_wsgi-express >> does out of the box. >> >> If want to try and compare performance with some WSGI test program, try with >> the following variations. >> >> Nothing special, only changing number of threads used by the daemon process >> from default of 5 to 3, as lower number of threads as possible is always >> better if you are going to try and hammer the web server with requests. >> >> mod_wsgi-express start-server --threads=3 wsgi.py >> >> Disable automatic reloading when WSGI script file is modified, and disable >> queue timeout as well, to eliminate handshake between Apache child worker >> processes and daemon process before sending request through. >> >> mod_wsgi-express start-server --threads=3 --disable-reloading >> --queue-timeout=0 wsgi.py >> >> Switch to embedded mode to eliminate all that overhead of proxying through >> to the daemon mode processes. >> >> mod_wsgi-express start-server --threads=3 --embedded-mode wsgi.py >> >> The performance improvements came about as a result of looking carefully at >> a new bunch of statistics one can get out of mod_wsgi on performance. I'll >> try and do a followup email on those new APIs later once I can get my test >> setup going again and I can capture some pretty pictures. >> >> Note, always remember that trying to benchmark stuff on macOS is a really >> bad idea and gives inconsistent results, so use a Linux system instead. >> >> Graham >> >> > > > -- > You received this message because you are subscribed to the Google Groups > "modwsgi" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected] > <mailto:[email protected]>. > To view this discussion on the web visit > https://groups.google.com/d/msgid/modwsgi/8AB25786-9F78-466F-8CA7-C64D11D71FE6%40gmail.com > > <https://groups.google.com/d/msgid/modwsgi/8AB25786-9F78-466F-8CA7-C64D11D71FE6%40gmail.com?utm_medium=email&utm_source=footer>. -- You received this message because you are subscribed to the Google Groups "modwsgi" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/modwsgi/8BA14FF4-4078-47F7-8610-956D705ECBA0%40gmail.com.
