golang性能调试工具net/http/pprof
代码引入net/http/pprof：
package mainimport ("fmt""net/http"_ "net/http/pprof"
)func main() {go func() {fmt.Println(http.ListenAndServe(":9192", nil))}()
}
编译启动后，通过页面访问：
http://192.168.137.2:9192/debug/pprof/
分为以下项目：
Profile Descriptions:
-
allocs:
A sampling of all past memory allocations -
block:
Stack traces that led to blocking on synchronization primitives -
cmdline:
The command line invocation of the current program -
goroutine:
Stack traces of all current goroutines. Use debug=2 as a query parameter to export in the same format as an unrecovered panic. -
heap:
A sampling of memory allocations of live objects. You can specify the gc GET parameter to run GC before taking the heap sample. -
mutex:
Stack traces of holders of contended mutexes -
profile:
CPU profile. You can specify the duration in the seconds GET parameter. After you get the profile file, use the go tool pprof command to investigate the profile. -
threadcreate:
Stack traces that led to the creation of new OS threads -
trace:
A trace of execution of the current program. You can specify the duration in the seconds GET parameter. After you get the trace file, use the go tool trace command to investigate the trace.
但是此种方式查看不够直观，可以通过go tool pprof工具生成动态图像查看：
yum install graphviz
查看内存分配：
go tool pprof -http=192.168.137.2:8000 http://127.0.0.1:9192/debug/pprof/allocs
查看CPU占用：
go tool pprof -http=192.168.137.2:8000 http://127.0.0.1:9192/debug/pprof/profile
本机防火墙开放8000端口，通过页面访问：
firewall-cmd --add-port=8000/tcp --permanent
firewall-cmd --reload
http://192.168.137.2:8000/ui/