tsonntag
I spent hours to find out how to profile phx.server (in dev). Without success.
I am looking for something link (pseudo code)
“mix with eprof run phx.server”
or something equivalent in iex
or some hook in the application code
Where Next?
Trending in Questions
Other Trending Topics
Latest Phoenix Threads
Latest on Elixir Forum
Sponsor Spotlight
Catch errors, track performance, monitor hosts and more.
Categories:
Sub Categories:
Forums
Popular Tags
- #ecto
- #liveview
- #troubleshooting
- #learning-elixir
- #library
- #deployment
- #erlang
- #testing
- #genserver
- #mix
- #absinthe
- #remote-other
- #otp
- #plug
- #how-to-question
- #macros
- #postgres
- #elixirconf
- #channels
- #exunit
- #discussion
- #code-sync
- #podcasts
- #javascript
- #onsite
- #dialyzer
- #docker
- #authentication
- #umbrella
- #full-time-contract
- #podcasts-by-brainlid
- #ai
- #ecto-query
- #elixirconf-us
- #blog-post
- #elixir-ls
- #phoenix_html
- #iex
- #graphql
- #genstage
- #websockets
- #supervisor
- #advent-of-code
- #distillery
- #processes
- #elixirconf-eu
- #api
- #forms
- #metaprogramming
- #hex
Our Sponsors
Build Elixir applications with speed and confidence.
Supporting innovation across the BEAM ecosystem.
Catch errors, track performance, monitor hosts and more.
Error tracking, logs, uptime, and Just Enough APM. Built for developers.
Elixir, Erlang & BEAM conferences from Code Sync - join us in 2026!
Practical resources that improve the lives of professional developers.
Master modern tools, write cleaner code, and tackle real-world challenges.
Producing high quality Elixir screencasts since 2017.
The team behind Membrane, Popcorn, LiveDebugger. Available for hire.
Courses that'll move you from confusion to "Aha, now I get it!"
Showing Posts 2 to 1- Show Best Posts
- Show All (oldest first)
- Show All (newest first)
thiagomajesk
This is a pretty old thread, but I wonder if anyone has tried something like this recently. I’m trying to profile a Phoenix app and I feel this should be easier. Here’s what I tried so far:
iex -S mix phx.server:eprof.start_profiling([self()]):eprof.stop_profiling():eprof.analyze(:total)However,
eprofdoes not log anything from the app itself. Usingfprofthough, I can get some calls to the application, but the summary format you get is pretty wild:iex -S mix phx.server:fprof.start():fprof.trace([:start, procs: :all]):fprof.trace(:stop):fprof.profile():fprof.analyse(:totals)NobbZ
You usually do not profile the running server. That would in best case only give you a profile of the connection acceptor, but not the spawned processes that actually handle the request.
You need to profile the actual controllers or views you are interested in.