There are a lot of Blogs on Go - pprof. Unfortunately, the code samples are pretty badly written or dont work off the bat. This code is a live working example of pprof in action.
It show cases 2 modes.
- Via
net/httpusing the Web server routes innet/http/pprof.Init()-- WORKS - Using
github.com/pkg/profile; this creates.out/mem.pproffile but it remains @ 0KB -- FAIL
go build -o sample.exe main.go
go run main.gohttp://localhost:8082/debug/pprof/
Install Graphviz @ https://graphviz.org/download/ and ensure part of System PATH
go tool pprof -png http://localhost:8082/debug/pprof/heap > heap.pngIf you increase the ticker time to call clear(); you can crash the VM @ some point.
Following are generated by go tool command above
D:\...\profiling-pprof\sample>go run main.go
[main]
[Profiler started]
2021/09/15 18:14:31 profile: memory profiling enabled (rate 4096), out\mem.pprof
[f()]
[net/http] WebServer started @ http://localhost:8082/debug/pprof/
[f->go] Timer fired : Clear slice[568187513] @ 2021-09-15 18:15:31.1290589 +0530 IST m=+60.008981301
[clear]
[pre-clear] len= 568294570
[post-clear] len= 0
[f->go] Timer fired : Clear slice[294187520] @ 2021-09-15 18:16:31.1291916 +0530 IST m=+120.009114001
[clear]
[pre-clear] len= 294187952
[post-clear] len= 0
[f->go] Timer fired : Clear slice[294187520] @ 2021-09-15 18:17:31.1301379 +0530 IST m=+180.010060301
[clear]
[pre-clear] len= 294188396
[post-clear] len= 0
[f->go] Timer fired : Clear slice[573005841] @ 2021-09-15 18:18:31.1291326 +0530 IST m=+240.009055001
[clear]
[pre-clear] len= 573227942
[post-clear] len= 0
[f->go] Timer fired : Clear slice[235350016] @ 2021-09-15 18:19:31.1301378 +0530 IST m=+300.010060201
[clear]
[pre-clear] len= 235351899
[post-clear] len= 0
[f->go] Timer fired : Clear slice[459668480] @ 2021-09-15 18:20:31.1298302 +0530 IST m=+360.009752601
[clear]
[pre-clear] len= 459669033
[post-clear] len= 0
- github.com/pkg/profile
- Go /http/pprof
These articles were the initial source, but they all have their own holes which are put together in my code