[Go]Understand the golang project performance analysis tool PProf

PProf uses profile.proto to analyze data

Can collect command analysis when the program is executed

Run-time data analysis during HTTP service can be collected

Can be analyzed by go test test case


There are the following monitoring and analysis functions:

CPU analysis, memory analysis, blocking analysis, mutex analysis, Groutine analysis


If it is an http service, then it can be achieved by directly importing this package _ “net/http/pprof”

If you use the gin framework, you need to import this package github.com/gin-contrib/pprof

And register the gin object pprof.Register(g)


Directly visit http://service/debug/pprof/ through the browser

You can see the following page



 The meaning of each parameter is:

allocs: view all past memory allocation sample
blocks: view the stack trace that caused blocking synchronization
cmdline: the complete call path of the command line of the current program
goroutine: view all currently running goroutines stack trace
heap: view the memory allocation of active objects
mutex: View the stack trace
profile of the competing holder that caused the mutex lock : CPU Profiling is performed for 30s by default, and a profile file for analysis is obtained.
threadcreate: View the stack trace of creating a new OS thread


Use the interactive command line to analyze the results of the above URL

For example, analyze the resident memory situation

go tool pprof -inuse_space http://localhost:8081/debug/pprof/heap input top command




For example, analyze the temporary allocation of memory

go tool pprof -alloc_objects http://localhost:8081/debug/pprof/heap input top command




Analyze goroutine

 go tool pprof http://localhost:6060/debug/pprof/goroutine You can use traces to see the call stack

The focus is on the independent goroutine that I opened myself, and the bottom one is the call function of the package I wrote.

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