beego postgresql maximum db connections - postgresql

Question

I'm trying to make a simple api application using beego. During the stress test, there was an unexpected problem. Before ~16400 requests everything executes at fantastic speed. After 16400 queries almost all stops, runs 1-2 requests per second. I have a feeling that beego can not allocate a connection to the database. I tried to change maxIdle, maxConn parameters but no effect.
UPD. the same problem with other databases
MainController:
package controllers
import (
models "github.com/Hepri/taxi/models"
"github.com/astaxie/beego"
"github.com/astaxie/beego/orm"
)
type MainController struct {
beego.Controller
}
func (c *MainController) Get() {
o := orm.NewOrm()
app := models.ApiApp{}
err := o.Read(&app)
if err == orm.ErrMissPK {
// do nothing
}
c.ServeJson()
}
Model:
package models
const (
CompanyAccessTypeAll = 1
CompanyAccessTypeSpecific = 2
)
type ApiApp struct {
Id int `orm:"auto"`
Token string `orm:"size(100)"`
}
func (a *ApiApp) TableName() string {
return "api_apps"
}
main.go:
package main
import (
models "github.com/Hepri/taxi/models"
_ "github.com/Hepri/taxi/routers"
"github.com/astaxie/beego"
"github.com/astaxie/beego/orm"
_ "github.com/lib/pq"
)
func main() {
orm.RegisterDriver("postgres", orm.DR_Postgres)
orm.RegisterDataBase("default", "postgres", "user=test password=123456 dbname=test sslmode=disable")
orm.RegisterModel(new(models.ApiApp))
beego.EnableAdmin = true
orm.RunCommand()
beego.Run()
}
before reach ~16400:
Benchmarking localhost (be patient)
^C
Server Software: beegoServer:1.4.2
Server Hostname: localhost
Server Port: 8080
Document Path: /
Document Length: 4 bytes
Concurrency Level: 10
Time taken for tests: 3.844 seconds
Complete requests: 16396
Failed requests: 0
Write errors: 0
Total transferred: 2492192 bytes
HTML transferred: 65584 bytes
Requests per second: 4264.91 [#/sec] (mean)
Time per request: 2.345 [ms] (mean)
Time per request: 0.234 [ms] (mean, across all concurrent requests)
Transfer rate: 633.07 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 0 0 2.2 0 275
Processing: 0 2 10.9 1 370
Waiting: 0 1 8.6 1 370
Total: 0 2 11.1 2 370
Percentage of the requests served within a certain time (ms)
50% 2
66% 2
75% 2
80% 2
90% 2
95% 3
98% 3
99% 4
100% 370 (longest request)
after reach ~16400:
Benchmarking localhost (be patient)
^C
Server Software: beegoServer:1.4.2
Server Hostname: localhost
Server Port: 8080
Document Path: /
Document Length: 4 bytes
Concurrency Level: 10
Time taken for tests: 15.534 seconds
Complete requests: 16392
Failed requests: 0
Write errors: 0
Total transferred: 2491584 bytes
HTML transferred: 65568 bytes
Requests per second: 1055.22 [#/sec] (mean)
Time per request: 9.477 [ms] (mean)
Time per request: 0.948 [ms] (mean, across all concurrent requests)
Transfer rate: 156.63 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 0 0 0.3 0 11
Processing: 0 2 16.7 1 614
Waiting: 0 1 15.7 1 614
Total: 0 2 16.7 1 614
Percentage of the requests served within a certain time (ms)
50% 1
66% 1
75% 2
80% 2
90% 2
95% 2
98% 3
99% 3
100% 614 (longest request)
same picture even after 30 seconds
Benchmarking localhost (be patient)
^C
Server Software: beegoServer:1.4.2
Server Hostname: localhost
Server Port: 8080
Document Path: /
Document Length: 4 bytes
Concurrency Level: 10
Time taken for tests: 25.585 seconds
Complete requests: 16391
Failed requests: 0
Write errors: 0
Total transferred: 2491432 bytes
HTML transferred: 65564 bytes
Requests per second: 640.65 [#/sec] (mean)
Time per request: 15.609 [ms] (mean)
Time per request: 1.561 [ms] (mean, across all concurrent requests)
Transfer rate: 95.10 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 0 1 10.1 0 617
Processing: 0 2 16.2 1 598
Waiting: 0 1 11.1 1 597
Total: 0 2 19.1 1 618
Percentage of the requests served within a certain time (ms)
50% 1
66% 2
75% 2
80% 2
90% 2
95% 2
98% 3
99% 3
100% 618 (longest request)