Debugging and Profiling Symfony Apps

Debugging and Proﬁling symfony applications by Alvaro Videla Wednesday, February 17, 2010

About Me • Lead Developer at TheNetCircle.com • Creator of FireSymfony • Twitter: @old_sound • Blog: http://obvioushints.blogspot.com/ Wednesday, February 17, 2010

About Me • Lead Developer at TheNetCircle.com • Creator of FireSymfony - 16.000 downloads • Twitter: @old_sound • Blog: http://obvioushints.blogspot.com/ Wednesday, February 17, 2010

About our symfony site • 2.000.000+ members • 250.000+ logins/day • 300.000+ private messages/day • 14.000 req/min in the top 6 actions Wednesday, February 17, 2010

Let’s talk about: • Debugging Tools • Proﬁling Tools • Benchmarking Tools • Live Site Metrics Wednesday, February 17, 2010

Symfony Tools Wednesday, February 17, 2010

Loggers Wednesday, February 17, 2010

sfFileLogger • logs per controller & environment • very useful for development • Prod, disable or set level: err Wednesday, February 17, 2010

There’s a lot of information on the logs • Cache hits • Cache misses • Number of Database Queries Wednesday, February 17, 2010

AWK • Extract information using AWK • use: /(M|m)atch route/ http://gist.github.com/271034 Wednesday, February 17, 2010

Problems of this approach • Hard to use with several servers • Require to ssh and inspect logs in each of the servers • Hard to visualize data in context Wednesday, February 17, 2010

Next Step A Centralized Logger Wednesday, February 17, 2010

Sample Use Case • CouchDB backend • One Server collecting logs from 28 PHP machines • 15 million logs in the ﬁrst week Wednesday, February 17, 2010

A Centralized Logger Wednesday, February 17, 2010

5 minute How To A Redis Logger http://github.com/videlalvaro/avRedisLoggerPlugin Wednesday, February 17, 2010

Logger Roadmap Wednesday, February 17, 2010

Timers Wednesday, February 17, 2010

sfTimer • Easy to use • Integrated with symfony debug tools Wednesday, February 17, 2010

Using Timers Wednesday, February 17, 2010

Problems of this approach • Require to modify the code to add timers • Only provides execution time information • Best suited to run in dev mode Wednesday, February 17, 2010

Next Step Proﬁle with XHProf Wednesday, February 17, 2010

XHProf • C extension for PHP • Open sourced by Facebook • Hierarchical Proﬁler • Extracts: - Walltime - Memory Usage Wednesday, February 17, 2010

XHProf Web Interface • Single Runs • Compare Runs • Aggregate Runs • Sort runs by: - Number Function Calls - Memory Usage - Walltime Wednesday, February 17, 2010

5 minute How To Adding XHProf to an index.php http://gist.github.com/300261 Wednesday, February 17, 2010

symfony 1.0 vs. symfony 1.2* *sfCompat10Plugin enabled Wednesday, February 17, 2010

@old_sound: “Hello World!” Benchmarks Considered Evil! #sﬂive2010 1 second ago from Cité Universitaire Internationale Wednesday, February 17, 2010

Tsung • High performance benchmarking framework • Open Source • Distributed benchmarking • Can simulate user sessions • Records and replay browser interaction • Can benchmark HTTP, MySQL, Ejabberd • Can be extended Wednesday, February 17, 2010

Tsung Sessions • Arrival Phase • Duration • Amount of Users • Meassure system load Wednesday, February 17, 2010

Tsung Wednesday, February 17, 2010

Metrics Wednesday, February 17, 2010

Metrics Live Site Metrics With Graphite Wednesday, February 17, 2010

Graphite • “... a highly scalable real-time graphing system” • Open Source • Text Protocol • Awesome Graphics Capabilities http://graphite.wikidot.com/ Wednesday, February 17, 2010

Graphite in Action Wednesday, February 17, 2010

We use it for • System Load Comparisons • APC Stats • Memcache Stats • Number of Online Users • AVG module/action request time • AVG module/action memory usage • module/action request count Wednesday, February 17, 2010

5 minute How To Adding Graphite to an index.php http://gist.github.com/300265 Wednesday, February 17, 2010

Roadmap • Write C PHP Extension • Take advantage of Request Life Cycle • Ease metric recording Wednesday, February 17, 2010

Links • http://www.rabbitmq.com/ • http://tsung.erlang-projects.org/ • http://graphite.wikidot.com/ • http://pecl.php.net/package/xhprof Wednesday, February 17, 2010

Questions? Wednesday, February 17, 2010

Thanks! Alvaro Videla http://twitter.com/old_sound Wednesday, February 17, 2010

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Debugging and Profiling Symfony Apps

by Alvaro Videla

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