go程序内存占用的困惑

新手， 用 github.com/labstack/echo 写了一个api, 里面调用mongodb获取一些数据 我调用一次api内存就增加一点点, 感觉内存一直在增加就没有减少过， 等了很久都没有减少过，go不是说自动回收资源嘛，怎么只有增加没有减少， 望大侠指点下可能是哪里出了问题, 大概代码如下: ```go package api import ( "etc" "github.com/labstack/echo" ) //ApiServer 实体 type ApiServer struct { echo *echo.Echo } //NewApiServer 创建实例,加载配制文件 func NewApiServer() (*ApiServer, error) { err := etc.New("etc/serverconfig.yml") if err != nil { return nil, err } e := echo.New() apiserver := &ApiServer{ echo:e, } apiserver.InitRouter() return apiserver, nil } //StartUp 启动实例 func (s *ApiServer) StartUp() error { return s.echo.Start(etc.Config.ApiServer.Bind) } ``` ```go package api import "ctrl" func (service *ApiServer) InitRouter() { //get person service.echo.GET("/api/persons/:person", ctrl.PersonCtr.GetPerson) //post person service.echo.POST("/api/persons", ctrl.PersonCtr.SavePerson) } ``` ```go package ctrl import ( "strconv" "strings" "net/http" "github.com/labstack/echo" "ctrl/request" "ctrl/response" //"dataaccess" //"fmt" ) var PersonCtr = &personController{} //personController Person控制器 type personController struct { } //getPerson 获取单个用户 func (s *personController) GetPerson(e echo.Context) error { result := &response.Result {Code:0} person := strings.TrimSpace(e.Param("person")) personId, err := strconv.Atoi(person) if len(person) == 0 || err != nil { result.Message = "person isn't empty" return e.JSON(http.StatusBadRequest, result) } //temp := GetPerson(personId) 调用数据层的接口 temp := "PersonCtroller information: " + strconv.Itoa(personId) result.Code = 1 result.Message = "success" result.Data = temp /* if data, errdata := dataaccess.GetPersonLog(); errdata != nil { fmt.Println(errdata) } else { result.Data = data } */ return e.JSON(http.StatusOK, result) } ```