Hi, we already tried to add timers (using sfTimerManager) on some key algorithms (routing, culture detection, tree recursive searches, ...) and we didn't find anything off the chart. It seems that everything is slower than we expected but not too much, pointing us to an algorithm issue. I will try XHProf as soon as I will have a few hours behind me but I'm not sure I'll find much more things compared to XDebug :( Thanks !
Rémi On Nov 16, 12:25 pm, Alexandre Salomé <alexandre.sal...@gmail.com> wrote: > Create a pre-production environment, secured to disallow web access and > enable the debug bar. > > symfony has some time-watching features in debug bar, it could give you some > measures. > > Check the symfony environment and your configuration files : maybe your > "prod" environment is not really ready for production. > > Also heard about XHProf for profiling > :http://mirror.facebook.net/facebook/xhprof/doc.html > > Give it a try, and give us feedback ;) > > Alex' > > 2010/11/16 Remi <remi.alv...@gmail.com> > > > > > Hi, > > > I'm working on a Symfony project for the past 11 months. The project > > is basically to throw away the old FrontEnd of a well-known shopping > > comparator, written in java and to replace it with a brand new > > frontend written in PHP with a Service Oriented Architecture (SOA). > > Our high-level architecture is to have a light-weighted frontend in > > PHP (using Symfony 1.4) and a WebService Aggregator written in Java > > (Jersey framework) to ensure all call to underlined webservices are > > done in parallal. This aggregator is extremly performant : it handles > > more than 200 Queries Per Second (QPS). > > > Our main issue is more about the PHP frontend. Despite all our > > efforts, we can't handle more than 15 QPS on each server. Just to give > > you an idea, here are a few key informations about our achitecture : > > > * 6 Servers with 4 physical cores (8 with HyperThreading enabled) > > and 24GB of RAM > > * Using Symfony 1.4.1 with PHP 5.2.10 > > * No database access : all datas are fetched using WebServices > > * Centos 5.4 Final 64 bits > > * Apache 2.2.3 > > * APC cache enabled > > * using SimpleXml to read XML feeds (300 nodes tops) coming from > > our WebServices > > * using mod_php > > * PHP memory limit is set to 128M in our production servers (we > > noticed lots of performances issues with only 32M or even 64M) > > > Our FrontEnd does not handle complex algorithm. Basically, it get its > > data from some High Performances webservices (all internal), read the > > request, render the page and log some usefull data (access logs using > > Apache and some custom logs for our business). Everything is monitored > > closely and the bottleneck seems to come from CPU usage which reach > > 100% pretty often. > > We tried a few things : > > > * Using Apache FastCGI (quite complicated on Centos5.4 since we > > have to re-compile it) : slight increase but is not worth all the > > trouble it causes on our company architecture. Nevertheless, it seems > > that we did some configuration mistakes and we need to bench it again. > > * Caching a few modules : header, footer, ads, ... > > * Replacing Apache by NGix : no change at all > > > For the moment, our average server time exceed 1 second which is > > really bad compared to our old Java-based website (300-400 ms) and we > > didn't have rollouted all supported pages or even all our countries > > (we expect to double the number of connection by activating all > > remaining countries). > > Do you have any idea on how we could increase our performances ? Do we > > need to directly contact SensioLabs to negociate some contractor time > > (maybe a Symfony Guru ?) ? > > Do you know some tools that can help us to profile our application in > > production environment ? We've already tried XDebug on developer > > workstations but we don't have the same exact behavior in production. > > What I'd like to test is to (manually) instrumentate our source code > > to add some timers around some potentially costly algorithms. So you > > know any tool that could help us to do that ? > > > I already have created a topic on Symfony forum : > >http://forum.symfony-project.org/viewtopic.php?f=3&t=30853&p=108430#p... > > > Thanks. > > > -- > > If you want to report a vulnerability issue on symfony, please send it to > > security at symfony-project.com > > > You received this message because you are subscribed to the Google > > Groups "symfony users" group. > > To post to this group, send email to symfony-users@googlegroups.com > > To unsubscribe from this group, send email to > > symfony-users+unsubscr...@googlegroups.com<symfony-users%2bunsubscr...@googlegroups.com> > > For more options, visit this group at > >http://groups.google.com/group/symfony-users?hl=en > > -- > Alexandre Saloméhttp://alexandre-salome.fr -- If you want to report a vulnerability issue on symfony, please send it to security at symfony-project.com You received this message because you are subscribed to the Google Groups "symfony users" group. To post to this group, send email to symfony-users@googlegroups.com To unsubscribe from this group, send email to symfony-users+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/symfony-users?hl=en
