View source for Go pprof Concepts

=External=
=Internal=
* [[Go_pprof#Subjects|<tt>pprof</tt>]]
=Overview=
=Profile=

A '''profile''' is a collection of stack traces showing the call sequences that led to instances of a particular event, such as allocation. Packages can create and maintain their own profiles. The most common use is for tracking resources that must be explicitly closed, such as files or network connections. 

Each profile has a unique name. 

There are a few predefined profiles:

==<tt>goroutine</tt>==

The profile contains the stack traces of all current goroutines. This is how you can [[Go_pprof_Operations#Dump_Goroutines|pull it from the process with <code>curl</code>]].

The goroutines can be in one of the following states:
* <code>running</code>
* <code>chan receive</code>[<code>, x minutes</code>]
* <code>syscall</code>[<code>, x minutes</code>]
* <code>select</code>[<code>, x minutes</code>]
* <code>IO wait</code>[<code>, x minutes</code>]
* <code>sync.Cond.Wait</code>[<code>, x minutes</code>]
* <code>semacquire</code>[<code>, x minutes</code>]
==<tt>heap</tt>==
The profile contains a sampling of all heap allocation.
==<tt>threadcreate</tt>==
The profile contains stack traces that led to the creation of new OS threads.
==<tt>block</tt>==
The profile contains stack traces that led to blocking on synchronization primitives.
==<tt>mutex</tt>==
The profile contains stack traces of holders of contended mutexes.