Using trace and dbg in Erlang

Posted by Gordon Guthrie on Stack Overflow See other posts from Stack Overflow or by Gordon Guthrie
Published on 2009-12-23T19:40:27Z Indexed on 2010/05/14 1:54 UTC
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erlang

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debugging

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trace

I am trying to start using erlang:trace/3 and the dbg module to trace the behaviour of a live production system without taking the server down.

The documentation is opaque (to put it mildly) and there don't appear to be any useful tutorials online.

What I spent all day trying to do was capture what was happening in a particular function by trying to apply a trace to module:function using dbg:c and dbg:p but with no success at all...

Does anyone have a succinct explanation of how to use trace in a live Erlang system?

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