Mixing
How to use setPoolLimit to manage the connections?
I'm building an application by using golang with mongodb atlas which has a max connections. I tried to use "session.SetPoolLimit(5)" to ensure that there is no more than 5 connections at the same time. However, it did not work.
var originSession *mgo.Session
func query(wg *sync.WaitGroup) {
mySession := originSession.Copy()
var items interface{}
mySession.DB("testdb").C("test").Find(nil).All(&items)
time.Sleep(1500)
mySession.Close()
wg.Done()
}
func main() {
originSession, _ = mgo.Dial(connectString) // connect to server
defer originSession.Close()
originSession.SetPoolLimit(5)
var wg sync.WaitGroup
for i:=0; i<50;i++{
wg.Add(1)
go getInfoBackWithSleep(&wg)
}
wg.Wait()
}
I used db.serverStatus().connections to check the number of connections.
{ "current" : 1, "available" : 99, "totalCreated" : xxx}
{ "current" : 50, "available" : 50, "totalCreated" : xxx}
{ "current" : 1, "available" : 99, "totalCreated" : xxx}
To my understanding, the setPoolLimit(5) should keep the "current" not more than (1+5)=6. But it did not block other sessions that comes behind the first 5 sessions.
However, If I change the limit to 1. (setPoolLimit(1)) It would only let one single connection work at the same time while block others. Seems the pool limit only work if I set it as 1.
mongodb go mgo
asked Nov 21 '18 at 22:32
JJJ HHHJJJ HHH
62
add a comment |
I'm building an application by using golang with mongodb atlas which has a max connections. I tried to use "session.SetPoolLimit(5)" to ensure that there is no more than 5 connections at the same time. However, it did not work.
var originSession *mgo.Session
func query(wg *sync.WaitGroup) {
mySession := originSession.Copy()
var items interface{}
mySession.DB("testdb").C("test").Find(nil).All(&items)
time.Sleep(1500)
mySession.Close()
wg.Done()
}
func main() {
originSession, _ = mgo.Dial(connectString) // connect to server
defer originSession.Close()
originSession.SetPoolLimit(5)
var wg sync.WaitGroup
for i:=0; i<50;i++{
wg.Add(1)
go getInfoBackWithSleep(&wg)
}
wg.Wait()
}
I used db.serverStatus().connections to check the number of connections.
{ "current" : 1, "available" : 99, "totalCreated" : xxx}
{ "current" : 50, "available" : 50, "totalCreated" : xxx}
{ "current" : 1, "available" : 99, "totalCreated" : xxx}
To my understanding, the setPoolLimit(5) should keep the "current" not more than (1+5)=6. But it did not block other sessions that comes behind the first 5 sessions.
However, If I change the limit to 1. (setPoolLimit(1)) It would only let one single connection work at the same time while block others. Seems the pool limit only work if I set it as 1.
mongodb go mgo
asked Nov 21 '18 at 22:32
JJJ HHHJJJ HHH
62
add a comment |
I'm building an application by using golang with mongodb atlas which has a max connections. I tried to use "session.SetPoolLimit(5)" to ensure that there is no more than 5 connections at the same time. However, it did not work.
var originSession *mgo.Session
func query(wg *sync.WaitGroup) {
mySession := originSession.Copy()
var items interface{}
mySession.DB("testdb").C("test").Find(nil).All(&items)
time.Sleep(1500)
mySession.Close()
wg.Done()
}
func main() {
originSession, _ = mgo.Dial(connectString) // connect to server
defer originSession.Close()
originSession.SetPoolLimit(5)
var wg sync.WaitGroup
for i:=0; i<50;i++{
wg.Add(1)
go getInfoBackWithSleep(&wg)
}
wg.Wait()
}
I used db.serverStatus().connections to check the number of connections.
{ "current" : 1, "available" : 99, "totalCreated" : xxx}
{ "current" : 50, "available" : 50, "totalCreated" : xxx}
{ "current" : 1, "available" : 99, "totalCreated" : xxx}
To my understanding, the setPoolLimit(5) should keep the "current" not more than (1+5)=6. But it did not block other sessions that comes behind the first 5 sessions.
However, If I change the limit to 1. (setPoolLimit(1)) It would only let one single connection work at the same time while block others. Seems the pool limit only work if I set it as 1.
mongodb go mgo
asked Nov 21 '18 at 22:32
JJJ HHHJJJ HHH
62
I'm building an application by using golang with mongodb atlas which has a max connections. I tried to use "session.SetPoolLimit(5)" to ensure that there is no more than 5 connections at the same time. However, it did not work.
var originSession *mgo.Session
func query(wg *sync.WaitGroup) {
mySession := originSession.Copy()
var items interface{}
mySession.DB("testdb").C("test").Find(nil).All(&items)
time.Sleep(1500)
mySession.Close()
wg.Done()
}
func main() {
originSession, _ = mgo.Dial(connectString) // connect to server
defer originSession.Close()
originSession.SetPoolLimit(5)
var wg sync.WaitGroup
for i:=0; i<50;i++{
wg.Add(1)
go getInfoBackWithSleep(&wg)
}
wg.Wait()
}
I used db.serverStatus().connections to check the number of connections.
{ "current" : 1, "available" : 99, "totalCreated" : xxx}
{ "current" : 50, "available" : 50, "totalCreated" : xxx}
{ "current" : 1, "available" : 99, "totalCreated" : xxx}
To my understanding, the setPoolLimit(5) should keep the "current" not more than (1+5)=6. But it did not block other sessions that comes behind the first 5 sessions.
However, If I change the limit to 1. (setPoolLimit(1)) It would only let one single connection work at the same time while block others. Seems the pool limit only work if I set it as 1.
mongodb go mgo
mongodb go mgo
asked Nov 21 '18 at 22:32
JJJ HHHJJJ HHH
62
asked Nov 21 '18 at 22:32
JJJ HHHJJJ HHH
62
asked Nov 21 '18 at 22:32
JJJ HHHJJJ HHH
62
asked Nov 21 '18 at 22:32
JJJ HHHJJJ HHH
62
asked Nov 21 '18 at 22:32
JJJ HHHJJJ HHH
62
62
add a comment |
add a comment |
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