diff --git a/gdxsv/db.go b/gdxsv/db.go
index 1dbd332..cf6c5e8 100644
--- a/gdxsv/db.go
+++ b/gdxsv/db.go
@@ -122,7 +122,7 @@ type DB interface {
 	RegisterAccount(ip string) (*DBAccount, error)
 
 	// RegisterAccountWithLoginKey creates new user account with specific login key.
-	// This function enables users to share login-key among different servers.
+	// This function enables userPeers to share login-key among different servers.
 	RegisterAccountWithLoginKey(ip string, loginKey string) (*DBAccount, error)
 
 	// GetAccountByLoginKey retrieves an account by login-key.
@@ -135,7 +135,7 @@ type DB interface {
 	LoginAccount(account *DBAccount, sessionID string) error
 
 	// RegisterUser creates new user.
-	// An account can hold three users.
+	// An account can hold three userPeers.
 	RegisterUser(loginKey string) (*DBUser, error)
 
 	// GetUserList returns user list that the account holds.
@@ -167,9 +167,9 @@ type DB interface {
 	// CalculateUserDailyBattleCount calculates daily battle count of the user.
 	CalculateUserDailyBattleCount(userID string) (ret BattleCountResult, err error)
 
-	// GetWinCountRanking returns top users of win count.
+	// GetWinCountRanking returns top userPeers of win count.
 	GetWinCountRanking(side byte) (ret []*RankingRecord, err error)
 
-	// GetWinCountRanking returns top users of kill count.
+	// GetWinCountRanking returns top userPeers of kill count.
 	GetKillCountRanking(side byte) (ret []*RankingRecord, err error)
 }
diff --git a/gdxsv/lbs.go b/gdxsv/lbs.go
index 13fc5cb..ffa1b9f 100644
--- a/gdxsv/lbs.go
+++ b/gdxsv/lbs.go
@@ -32,10 +32,9 @@ const (
 
 type Lbs struct {
 	handlers  map[CmdID]LbsHandler
-	users     map[string]*LbsPeer
+	userPeers map[string]*LbsPeer
+	mcsPeers  map[string]*LbsPeer
 	lobbies   map[byte]map[uint16]*LbsLobby
-	mcsPeers  map[string]*LbsPeer   // publicAddr -> McsStatus
-	mcsStatus map[string]*McsStatus // region -> McsStatus
 	chEvent   chan interface{}
 	chQuit    chan interface{}
 }
@@ -43,10 +42,9 @@ type Lbs struct {
 func NewLbs() *Lbs {
 	app := &Lbs{
 		handlers:  defaultLbsHandlers,
-		users:     make(map[string]*LbsPeer),
-		lobbies:   make(map[byte]map[uint16]*LbsLobby),
+		userPeers: make(map[string]*LbsPeer),
 		mcsPeers:  make(map[string]*LbsPeer),
-		mcsStatus: make(map[string]*McsStatus),
+		lobbies:   make(map[byte]map[uint16]*LbsLobby),
 		chEvent:   make(chan interface{}, 64),
 		chQuit:    make(chan interface{}),
 	}
@@ -82,26 +80,26 @@ func (lbs *Lbs) GetLobby(platform uint8, lobbyID uint16) *LbsLobby {
 	return lobby
 }
 
-func (s *Lbs) ListenAndServe(addr string) error {
+func (lbs *Lbs) ListenAndServe(addr string) error {
 	glog.Info("ListenAndServe", addr)
 
 	tcpAddr, err := net.ResolveTCPAddr("tcp", addr)
 	if err != nil {
 		return err
 	}
-	listner, err := net.ListenTCP("tcp", tcpAddr)
+	listener, err := net.ListenTCP("tcp", tcpAddr)
 	if err != nil {
 		return err
 	}
-	go s.eventLoop()
+	go lbs.eventLoop()
 	for {
-		tcpConn, err := listner.AcceptTCP()
+		tcpConn, err := listener.AcceptTCP()
 		if err != nil {
 			glog.Errorln(err)
 			continue
 		}
 		glog.Infoln("A new tcp connection open.", tcpConn.RemoteAddr())
-		peer := s.NewPeer(tcpConn)
+		peer := lbs.NewPeer(tcpConn)
 		go peer.serve()
 	}
 }
@@ -118,17 +116,19 @@ func (lbs *Lbs) NewPeer(conn *net.TCPConn) *LbsPeer {
 }
 
 func (lbs *Lbs) FindMcs(region string) *McsStatus {
-	for _, mcs := range lbs.mcsStatus {
-		if strings.HasPrefix(mcs.Region, region) &&
-			mcs.PublicAddr != "" {
-			return mcs
+	for _, p := range lbs.mcsPeers {
+		if p.mcsStatus != nil {
+			if strings.HasPrefix(p.mcsStatus.Region, region) &&
+				p.mcsStatus.PublicAddr != "" {
+				return p.mcsStatus
+			}
 		}
 	}
 	return nil
 }
 
 func (lbs *Lbs) FindPeer(userID string) *LbsPeer {
-	p, ok := lbs.users[userID]
+	p, ok := lbs.userPeers[userID]
 	if !ok {
 		return nil
 	}
@@ -154,7 +154,7 @@ func (lbs *Lbs) Locked(f func(*Lbs)) {
 
 func (lbs *Lbs) Quit() {
 	lbs.Locked(func(app *Lbs) {
-		for _, p := range app.users {
+		for _, p := range app.userPeers {
 			SendServerShutDown(p)
 		}
 	})
@@ -188,6 +188,30 @@ type eventFunc struct {
 	c chan<- interface{}
 }
 
+func (lbs *Lbs) cleanPeer(p *LbsPeer) {
+	if p.UserID != "" {
+		if p.Room != nil {
+			p.Room.Exit(p.UserID)
+			lbs.BroadcastRoomState(p.Room)
+			p.Room = nil
+		}
+		if p.Lobby != nil {
+			p.Lobby.Exit(p.UserID)
+			lbs.BroadcastLobbyUserCount(p.Lobby)
+			lbs.BroadcastLobbyMatchEntryUserCount(p.Lobby)
+			p.Lobby = nil
+		}
+		delete(lbs.userPeers, p.UserID)
+	}
+
+	if p.mcsStatus != nil {
+		delete(p.app.mcsPeers, p.mcsStatus.PublicAddr)
+		p.mcsStatus = nil
+	}
+
+	p.conn.Close()
+}
+
 func (lbs *Lbs) eventLoop() {
 	tick := time.Tick(1 * time.Second)
 	peers := map[string]*LbsPeer{}
@@ -221,7 +245,7 @@ func (lbs *Lbs) eventLoop() {
 				}
 			case eventPeerLeave:
 				glog.Infoln("eventPeerLeave")
-				delete(lbs.users, args.peer.UserID)
+				lbs.cleanPeer(args.peer)
 				delete(peers, args.peer.Address())
 			case eventFunc:
 				args.f(lbs)
@@ -229,24 +253,11 @@ func (lbs *Lbs) eventLoop() {
 			}
 		case <-tick:
 			for _, p := range peers {
-				if 1 <= time.Since(p.lastRecvTime).Minutes() {
-					glog.Infoln("Kick", p.Address())
-					if p.UserID != "" {
-						if p.Room != nil {
-							p.Room.Exit(p.UserID)
-							lbs.BroadcastRoomState(p.Room)
-							p.Room = nil
-						}
-						if p.Lobby != nil {
-							p.Lobby.Exit(p.UserID)
-							lbs.BroadcastLobbyUserCount(p.Lobby)
-							lbs.BroadcastLobbyMatchEntryUserCount(p.Lobby)
-							p.Lobby = nil
-						}
-					}
-					delete(peers, p.Address())
+				lastRecvSince := time.Since(p.lastRecvTime)
+				if 1 <= lastRecvSince.Minutes() {
+					glog.Infoln("Kick peer", p.Address())
 					p.conn.Close()
-				} else {
+				} else if 10 <= lastRecvSince.Seconds() {
 					RequestLineCheck(p)
 				}
 			}
@@ -268,7 +279,7 @@ func (lbs *Lbs) BroadcastLobbyUserCount(lobby *LbsLobby) {
 	// For lobby select scene.
 	msg := NewServerNotice(lbsPlazaJoin).Writer().
 		Write16(lobby.ID).Write16(uint16(len(lobby.Users))).Msg()
-	for _, u := range lbs.users {
+	for _, u := range lbs.userPeers {
 		if u.Platform == lobby.Platform {
 			u.SendMessage(msg)
 		}
@@ -484,6 +495,9 @@ type LbsPeer struct {
 
 	mInbuf sync.Mutex
 	inbuf  []byte
+
+	// used only mcs peer
+	mcsStatus *McsStatus
 }
 
 func (p *LbsPeer) InLobbyChat() bool {
diff --git a/gdxsv/lbs_handler.go b/gdxsv/lbs_handler.go
index 29f370c..a071bfe 100644
--- a/gdxsv/lbs_handler.go
+++ b/gdxsv/lbs_handler.go
@@ -379,7 +379,7 @@ var _ = register(lbsUserRegist, func(p *LbsPeer, m *LbsMessage) {
 	}
 
 	p.DBUser = *u
-	p.app.users[p.UserID] = p
+	p.app.userPeers[p.UserID] = p
 	p.SendMessage(NewServerAnswer(m).Writer().WriteString(userID).Msg())
 })
 
@@ -410,7 +410,7 @@ var _ = register(lbsUserDecide, func(p *LbsPeer, m *LbsMessage) {
 	}
 
 	p.DBUser = *u
-	p.app.users[p.UserID] = p
+	p.app.userPeers[p.UserID] = p
 	p.SendMessage(NewServerAnswer(m).Writer().WriteString(p.UserID).Msg())
 	p.SendMessage(NewServerQuestion(lbsAskGameCode))
 })
@@ -962,7 +962,7 @@ var _ = register(lbsSendMail, func(p *LbsPeer, m *LbsMessage) {
 	glog.Infoln("com1", comment1)
 	glog.Infoln("com2", comment2)
 
-	u, ok := p.app.users[userID]
+	u, ok := p.app.userPeers[userID]
 	if !ok {
 		p.SendMessage(NewServerAnswer(m).SetErr().Writer().
 			WriteString("<LF=6><BODY><CENTER>THE USER IS NOT IN LOBBY<END>").Msg())
@@ -1161,7 +1161,7 @@ var _ = register(lbsTopRankingTag, func(p *LbsPeer, m *LbsMessage) {
 })
 
 var _ = register(lbsTopRankingSuu, func(p *LbsPeer, m *LbsMessage) {
-	// How many users there is in the ranking
+	// How many userPeers there is in the ranking
 	// page: ranking kind?
 	page := m.Reader().Read8()
 	glog.Infoln("page", page)
@@ -1362,8 +1362,7 @@ var _ = register(lbsExtSyncSharedData, func(p *LbsPeer, m *LbsMessage) {
 	}
 
 	glog.Infof("update mcs status: %+v", mcsStatus)
-	p.app.mcsStatus[mcsStatus.Region] = &mcsStatus
 	p.app.mcsPeers[mcsStatus.PublicAddr] = p
-
+	p.mcsStatus = &mcsStatus
 	SyncSharedDataMcsToLbs(&mcsStatus)
 })
diff --git a/gdxsv/lbs_mcsfunc.go b/gdxsv/lbs_mcsfunc.go
index 0f599bf..c075f95 100644
--- a/gdxsv/lbs_mcsfunc.go
+++ b/gdxsv/lbs_mcsfunc.go
@@ -31,7 +31,7 @@ var gcpLocationName = map[string]string{
 	"europe-west2":            "London, England, UK",
 	"europe-west3":            "Frankfurt, Germany",
 	"europe-west4":            "Eemshaven, Netherlands",
-	"europe-west6":            "Zürich, Switzerland",
+	"europe-west6":            "Zurich, Switzerland",
 	"northamerica-northeast1": "Montreal, Quebec, Canada",
 	"southamerica-east1":      "Osasco (Sao Paulo), Brazil",
 	"us-central1":             "Council Bluffs, Iowa, USA",
diff --git a/gdxsv/main.go b/gdxsv/main.go
index 8937cc8..c30f65f 100644
--- a/gdxsv/main.go
+++ b/gdxsv/main.go
@@ -141,7 +141,7 @@ func mainLbs() {
 		dumper.DisablePointerAddresses = true
 		go func() {
 			for {
-				ioutil.WriteFile("dump.txt", []byte(dumper.Sdump(lbs.users)), 0644)
+				ioutil.WriteFile("dump.txt", []byte(dumper.Sdump(lbs.userPeers)), 0644)
 				time.Sleep(time.Second)
 			}
 		}()
diff --git a/gdxsv/shareddata.go b/gdxsv/shareddata.go
index 67522c4..7ba2446 100644
--- a/gdxsv/shareddata.go
+++ b/gdxsv/shareddata.go
@@ -40,11 +40,11 @@ type McsStatus struct {
 	Region     string    `json:"region,omitempty"`
 	PublicAddr string    `json:"public_addr,omitempty"`
 	Updated    time.Time `json:"updated,omitempty"`
-	Users      []McsUser `json:"users,omitempty"`
+	Users      []McsUser `json:"userPeers,omitempty"`
 }
 
 type LbsStatus struct {
-	Users []McsUser `json:"users,omitempty"`
+	Users []McsUser `json:"userPeers,omitempty"`
 }
 
 func AddUserWhoIsGoingToBattle(battleCode string, mcsRegion string, userID string, name string, side uint16, sessionID string) {
diff --git a/infra/mcsfunc/index.js b/infra/mcsfunc/index.js
index 0079541..c3ea096 100644
--- a/infra/mcsfunc/index.js
+++ b/infra/mcsfunc/index.js
@@ -32,10 +32,17 @@ const gcpRegions = {
 function getStartupScript(version) {
     return `\
 #!/bin/bash
+echo "startup-script"
 
 apt-get update
 apt-get install -y jq wget curl
 
+curl -sSO https://dl.google.com/cloudagents/install-monitoring-agent.sh
+bash install-monitoring-agent.sh
+
+curl -sSO https://dl.google.com/cloudagents/install-logging-agent.sh
+bash install-logging-agent.sh
+
 if grep -xqFe 'ubuntu ALL=NOPASSWD: /sbin/shutdown' /etc/sudoers; then
   echo 'ubuntu ALL=NOPASSWD: /sbin/shutdown' >> /etc/sudoers
 fi
@@ -43,6 +50,7 @@ fi
 cat << 'EOF' > /home/ubuntu/launch-mcs.sh
 #!/bin/bash -eux
 
+
 function finish {
   echo "finish"
   sleep 1
@@ -78,6 +86,8 @@ EOF
 
 chmod +x /home/ubuntu/launch-mcs.sh
 su ubuntu -c 'cd /home/ubuntu && nohup ./launch-mcs.sh 2>&1 | logger &'
+
+echo "startup-script done"
 `
 }