chore: metrics performance improvements

main.go

@@ -11,7 +11,6 @@ import (
 	"time"
 
 	"github.com/lpar/gzipped/v2"
-	"github.com/muety/wakapi/models"
 	"github.com/muety/wakapi/routes/relay"
 
 	"github.com/emvi/logbuch"
@@ -58,6 +57,7 @@ var (
 	summaryRepository         repositories.ISummaryRepository
 	keyValueRepository        repositories.IKeyValueRepository
 	diagnosticsRepository     repositories.IDiagnosticsRepository
+	metricsRepository         *repositories.MetricsRepository
 )
 
 var (
@@ -149,6 +149,7 @@ func main() {
 	summaryRepository = repositories.NewSummaryRepository(db)
 	keyValueRepository = repositories.NewKeyValueRepository(db)
 	diagnosticsRepository = repositories.NewDiagnosticsRepository(db)
+	metricsRepository = repositories.NewMetricsRepository(db)
 
 	// Services
 	mailService = mail.NewMailService()
@@ -178,7 +179,7 @@ func main() {
 	healthApiHandler := api.NewHealthApiHandler(db)
 	heartbeatApiHandler := api.NewHeartbeatApiHandler(userService, heartbeatService, languageMappingService)
 	summaryApiHandler := api.NewSummaryApiHandler(userService, summaryService)
-	metricsHandler := api.NewMetricsHandler(userService, summaryService, heartbeatService, keyValueService)
+	metricsHandler := api.NewMetricsHandler(userService, summaryService, heartbeatService, keyValueService, metricsRepository)
 	diagnosticsHandler := api.NewDiagnosticsApiHandler(userService, diagnosticsService)
 	avatarHandler := api.NewAvatarHandler()
 
@@ -267,18 +268,6 @@ func main() {
 		middlewares.NewFileTypeFilterMiddleware([]string{".go"})(staticFileServer),
 	)
 
-	// Miscellaneous
-	// Pre-warm projects cache
-	if !config.IsDev() {
-		allUsers, err := userService.GetAll()
-		if err == nil {
-			logbuch.Info("pre-warming user project cache")
-			for _, u := range allUsers {
-				go heartbeatService.GetEntitySetByUser(models.SummaryProject, u)
-			}
-		}
-	}
-
 	// Listen HTTP
 	listen(router)
 }

migrations/20220318_mysql_timestamp_precision.go

@@ -0,0 +1,41 @@
+package migrations
+
+import (
+	"github.com/emvi/logbuch"
+	"github.com/muety/wakapi/config"
+	"gorm.io/gorm"
+)
+
+func init() {
+	const name = "20220318-mysql_timestamp_precision"
+	f := migrationFunc{
+		name: name,
+		f: func(db *gorm.DB, cfg *config.Config) error {
+			if hasRun(name, db) {
+				return nil
+			}
+
+			if cfg.Db.IsMySQL() {
+				logbuch.Info("altering heartbeats table, this may take a while (up to hours)")
+
+				db.Exec("SET foreign_key_checks=0;")
+				db.Exec("SET unique_checks=0;")
+				if err := db.Exec("ALTER TABLE heartbeats MODIFY COLUMN `time` TIMESTAMP(3) NOT NULL").Error; err != nil {
+					return err
+				}
+				if err := db.Exec("ALTER TABLE heartbeats MODIFY COLUMN `created_at` TIMESTAMP(3) NOT NULL").Error; err != nil {
+					return err
+				}
+				db.Exec("SET foreign_key_checks=1;")
+				db.Exec("SET unique_checks=1;")
+
+				logbuch.Info("migrated timestamp columns to millisecond precision")
+			}
+
+			setHasRun(name, db)
+			return nil
+		},
+	}
+
+	registerPostMigration(f)
+}

migrations/202203191_drop_diagnostics_user.go

@@ -0,0 +1,39 @@
+package migrations
+
+import (
+	"github.com/emvi/logbuch"
+	"github.com/muety/wakapi/config"
+	"github.com/muety/wakapi/models"
+	"gorm.io/gorm"
+)
+
+func init() {
+	const name = "202203191-drop_diagnostics_user"
+	f := migrationFunc{
+		name: name,
+		f: func(db *gorm.DB, cfg *config.Config) error {
+			if hasRun(name, db) {
+				return nil
+			}
+
+			migrator := db.Migrator()
+
+			if migrator.HasColumn(&models.Diagnostics{}, "user_id") {
+				logbuch.Info("running migration '%s'", name)
+
+				if err := migrator.DropConstraint(&models.Diagnostics{}, "fk_diagnostics_user"); err != nil {
+					logbuch.Warn("failed to drop 'fk_diagnostics_user' constraint (%v)", err)
+				}
+
+				if err := migrator.DropColumn(&models.Diagnostics{}, "user_id"); err != nil {
+					logbuch.Warn("failed to drop user_id column of diagnostics (%v)", err)
+				}
+			}
+
+			setHasRun(name, db)
+			return nil
+		},
+	}
+
+	registerPostMigration(f)
+}

migrations/20220319_add_user_project_idx.go

@@ -0,0 +1,35 @@
+package migrations
+
+import (
+	"fmt"
+	"github.com/emvi/logbuch"
+	"github.com/muety/wakapi/config"
+	"github.com/muety/wakapi/models"
+	"gorm.io/gorm"
+)
+
+func init() {
+	const name = "20220319-add_user_project_idx"
+	f := migrationFunc{
+		name: name,
+		f: func(db *gorm.DB, cfg *config.Config) error {
+			if hasRun(name, db) {
+				return nil
+			}
+
+			idxName := "idx_user_project"
+
+			if !db.Migrator().HasIndex(&models.Heartbeat{}, idxName) {
+				logbuch.Info("running migration '%s'", name)
+				if err := db.Exec(fmt.Sprintf("create index %s on heartbeats (user_id, project)", idxName)).Error; err != nil {
+					logbuch.Warn("failed to create %s", idxName)
+				}
+			}
+
+			setHasRun(name, db)
+			return nil
+		},
+	}
+
+	registerPostMigration(f)
+}

mocks/heartbeat_service.go

@@ -20,8 +20,8 @@ func (m *HeartbeatServiceMock) InsertBatch(heartbeats []*models.Heartbeat) error
 	return args.Error(0)
 }
 
-func (m *HeartbeatServiceMock) Count() (int64, error) {
+func (m *HeartbeatServiceMock) Count(a bool) (int64, error) {
-	args := m.Called()
+	args := m.Called(a)
 	return int64(args.Int(0)), args.Error(1)
 }
 

models/diagnostics.go

@@ -2,8 +2,6 @@ package models
 
 type Diagnostics struct {
 	ID           uint   `gorm:"primary_key"`
-	User         *User  `json:"-" gorm:"not null; constraint:OnUpdate:CASCADE,OnDelete:CASCADE"`
-	UserID       string `json:"-" gorm:"not null; index:idx_diagnostics_user"`
 	Platform     string `json:"platform"`
 	Architecture string `json:"architecture"`
 	Plugin       string `json:"plugin"`

models/heartbeat.go

@@ -11,11 +11,11 @@ import (
 type Heartbeat struct {
 	ID              uint64     `gorm:"primary_key" hash:"ignore"`
 	User            *User      `json:"-" gorm:"not null; constraint:OnUpdate:CASCADE,OnDelete:CASCADE;" hash:"ignore"`
-	UserID          string     `json:"-" gorm:"not null; index:idx_time_user"`
+	UserID          string     `json:"-" gorm:"not null; index:idx_time_user,idx_user_project"` // idx_user_project is for quickly fetching a user's project list (settings page)
 	Entity          string     `json:"entity" gorm:"not null"`
 	Type            string     `json:"type"`
 	Category        string     `json:"category"`
-	Project         string     `json:"project" gorm:"index:idx_project"`
+	Project         string     `json:"project" gorm:"index:idx_project,idx_user_project"`
 	Branch          string     `json:"branch" gorm:"index:idx_branch"`
 	Language        string     `json:"language" gorm:"index:idx_language"`
 	IsWrite         bool       `json:"is_write"`
@@ -23,11 +23,11 @@ type Heartbeat struct {
 	OperatingSystem string     `json:"operating_system" gorm:"index:idx_operating_system" hash:"ignore"` // ignored because os might be parsed differently by wakatime
 	Machine         string     `json:"machine" gorm:"index:idx_machine" hash:"ignore"`                   // ignored because wakatime api doesn't return machines currently
 	UserAgent       string     `json:"user_agent" hash:"ignore" gorm:"type:varchar(255)"`
-	Time            CustomTime `json:"time" gorm:"type:timestamp; index:idx_time,idx_time_user" swaggertype:"primitive,number"`
+	Time            CustomTime `json:"time" gorm:"type:timestamp(3); index:idx_time,idx_time_user" swaggertype:"primitive,number"`
 	Hash            string     `json:"-" gorm:"type:varchar(17); uniqueIndex"`
 	Origin          string     `json:"-" hash:"ignore" gorm:"type:varchar(255)"`
 	OriginId        string     `json:"-" hash:"ignore" gorm:"type:varchar(255)"`
-	CreatedAt       CustomTime `json:"created_at" gorm:"type:timestamp" swaggertype:"primitive,number" hash:"ignore"` // https://gorm.io/docs/conventions.html#CreatedAt
+	CreatedAt       CustomTime `json:"created_at" gorm:"type:timestamp(3)" swaggertype:"primitive,number" hash:"ignore"` // https://gorm.io/docs/conventions.html#CreatedAt
 }
 
 func (h *Heartbeat) Valid() bool {
@@ -36,7 +36,7 @@ func (h *Heartbeat) Valid() bool {
 
 func (h *Heartbeat) Timely(maxAge time.Duration) bool {
 	now := time.Now()
-	return now.Sub(h.Time.T()) <= maxAge && h.Time.T().Before(now)
+	return now.Sub(h.Time.T()) <= maxAge && h.Time.T().Sub(now) < 1*time.Hour
 }
 
 func (h *Heartbeat) Augment(languageMappings map[string]string) {

models/metrics/counter_metric.go

@@ -4,7 +4,7 @@ import "fmt"
 
 type CounterMetric struct {
 	Name   string
-	Value  int
+	Value  int64
 	Desc   string
 	Labels Labels
 }

repositories/heartbeat.go

@@ -1,6 +1,7 @@
 package repositories
 
 import (
+	conf "github.com/muety/wakapi/config"
 	"github.com/muety/wakapi/models"
 	"gorm.io/gorm"
 	"gorm.io/gorm/clause"
@@ -9,10 +10,11 @@ import (
 
 type HeartbeatRepository struct {
 	db     *gorm.DB
+	config *conf.Config
 }
 
 func NewHeartbeatRepository(db *gorm.DB) *HeartbeatRepository {
-	return &HeartbeatRepository{db: db}
+	return &HeartbeatRepository{config: conf.Get(), db: db}
 }
 
 // Use with caution!!
@@ -116,12 +118,19 @@ func (r *HeartbeatRepository) GetLastByUsers() ([]*models.TimeByUser, error) {
 	return result, nil
 }
 
-func (r *HeartbeatRepository) Count() (int64, error) {
+func (r *HeartbeatRepository) Count(approximate bool) (count int64, err error) {
-	var count int64
+	if r.config.Db.IsMySQL() && approximate {
-	if err := r.db.
+		err = r.db.Table("information_schema.tables").
+			Select("table_rows").
+			Where("table_schema = ?", r.config.Db.Name).
+			Where("table_name = 'heartbeats'").
+			Scan(&count).Error
+	}
+
+	if count == 0 {
+		err = r.db.
 			Model(&models.Heartbeat{}).
-		Count(&count).Error; err != nil {
+			Count(&count).Error
-		return 0, err
 	}
 	return count, nil
 }
@@ -145,6 +154,10 @@ func (r *HeartbeatRepository) CountByUsers(users []*models.User) ([]*models.Coun
 		userIds[i] = u.ID
 	}
 
+	if len(userIds) == 0 {
+		return counts, nil
+	}
+
 	if err := r.db.
 		Model(&models.Heartbeat{}).
 		Select("user_id as user, count(id) as count").
@@ -153,6 +166,7 @@ func (r *HeartbeatRepository) CountByUsers(users []*models.User) ([]*models.Coun
 		Find(&counts).Error; err != nil {
 		return counts, err
 	}
+
 	return counts, nil
 }
 

repositories/metrics.go

@@ -0,0 +1,43 @@
+package repositories
+
+import (
+	"github.com/muety/wakapi/config"
+	"gorm.io/gorm"
+)
+
+type MetricsRepository struct {
+	config *config.Config
+	db     *gorm.DB
+}
+
+const sizeTplMysql = `
+SELECT SUM(data_length + index_length)
+FROM information_schema.tables
+WHERE table_schema = ?
+GROUP BY table_schema`
+
+const sizeTplPostgres = `SELECT pg_database_size('%s');`
+
+const sizeTplSqlite = `
+SELECT page_count * page_size as size
+FROM pragma_page_count(), pragma_page_size();`
+
+func NewMetricsRepository(db *gorm.DB) *MetricsRepository {
+	return &MetricsRepository{config: config.Get(), db: db}
+}
+
+func (srv *MetricsRepository) GetDatabaseSize() (size int64, err error) {
+	cfg := srv.config.Db
+
+	query := srv.db.Raw("SELECT 0")
+	if cfg.IsMySQL() {
+		query = srv.db.Raw(sizeTplMysql, cfg.Name)
+	} else if cfg.IsPostgres() {
+		query = srv.db.Raw(sizeTplPostgres, cfg.Name)
+	} else if cfg.IsSQLite() {
+		query = srv.db.Raw(sizeTplSqlite)
+	}
+
+	err = query.Scan(&size).Error
+	return size, err
+}

repositories/repositories.go

@@ -25,7 +25,7 @@ type IHeartbeatRepository interface {
 	GetLastByUsers() ([]*models.TimeByUser, error)
 	GetLatestByUser(*models.User) (*models.Heartbeat, error)
 	GetLatestByOriginAndUser(string, *models.User) (*models.Heartbeat, error)
-	Count() (int64, error)
+	Count(bool) (int64, error)
 	CountByUser(*models.User) (int64, error)
 	CountByUsers([]*models.User) ([]*models.CountByUser, error)
 	GetEntitySetByUser(uint8, *models.User) ([]string, error)

repositories/user.go

@@ -98,10 +98,9 @@ func (r *UserRepository) GetByLoggedInAfter(t time.Time) ([]*models.User, error)
 // Returns a list of user ids, whose last heartbeat is not older than t
 // NOTE: Only ID field will be populated
 func (r *UserRepository) GetByLastActiveAfter(t time.Time) ([]*models.User, error) {
-	subQuery1 := r.db.Model(&models.User{}).
+	subQuery1 := r.db.Model(&models.Heartbeat{}).
-		Select("users.id as user, max(time) as time").
+		Select("user_id as user, max(time) as time").
-		Joins("left join heartbeats on users.id = heartbeats.user_id").
+		Group("user_id")
-		Group("user")
 
 	var userIds []string
 	if err := r.db.

routes/api/diagnostics.go

@@ -46,20 +46,12 @@ func (h *DiagnosticsApiHandler) RegisterRoutes(router *mux.Router) {
 func (h *DiagnosticsApiHandler) Post(w http.ResponseWriter, r *http.Request) {
 	var diagnostics models.Diagnostics
 
-	user := middlewares.GetPrincipal(r)
-	if user == nil {
-		w.WriteHeader(http.StatusUnauthorized)
-		w.Write([]byte(conf.ErrUnauthorized))
-		return
-	}
-
 	if err := json.NewDecoder(r.Body).Decode(&diagnostics); err != nil {
 		w.WriteHeader(http.StatusBadRequest)
 		w.Write([]byte(conf.ErrBadRequest))
 		conf.Log().Request(r).Error("failed to parse diagnostics for user %s - %v", err)
 		return
 	}
-	diagnostics.UserID = user.ID
 
 	if _, err := h.diagnosticsSrvc.Create(&diagnostics); err != nil {
 		w.WriteHeader(http.StatusInternalServerError)

routes/api/metrics.go

@@ -9,6 +9,7 @@ import (
 	"github.com/muety/wakapi/models"
 	v1 "github.com/muety/wakapi/models/compat/wakatime/v1"
 	mm "github.com/muety/wakapi/models/metrics"
+	"github.com/muety/wakapi/repositories"
 	"github.com/muety/wakapi/services"
 	"github.com/muety/wakapi/utils"
 	"net/http"
@@ -39,6 +40,7 @@ const (
 	DescMemAllocTotal = "Total number of bytes allocated for heap"
 	DescMemSysTotal   = "Total number of bytes obtained from the OS"
 	DescGoroutines    = "Total number of running goroutines"
+	DescDatabaseSize  = "Total database size in bytes"
 )
 
 type MetricsHandler struct {
@@ -47,14 +49,16 @@ type MetricsHandler struct {
 	summarySrvc   services.ISummaryService
 	heartbeatSrvc services.IHeartbeatService
 	keyValueSrvc  services.IKeyValueService
+	metricsRepo   *repositories.MetricsRepository
 }
 
-func NewMetricsHandler(userService services.IUserService, summaryService services.ISummaryService, heartbeatService services.IHeartbeatService, keyValueService services.IKeyValueService) *MetricsHandler {
+func NewMetricsHandler(userService services.IUserService, summaryService services.ISummaryService, heartbeatService services.IHeartbeatService, keyValueService services.IKeyValueService, metricsRepo *repositories.MetricsRepository) *MetricsHandler {
 	return &MetricsHandler{
 		userSrvc:      userService,
 		summarySrvc:   summaryService,
 		heartbeatSrvc: heartbeatService,
 		keyValueSrvc:  keyValueService,
+		metricsRepo:   metricsRepo,
 		config:        conf.Get(),
 	}
 }
@@ -141,21 +145,21 @@ func (h *MetricsHandler) getUserMetrics(user *models.User) (*mm.Metrics, error)
 	metrics = append(metrics, &mm.CounterMetric{
 		Name:   MetricsPrefix + "_cumulative_seconds_total",
 		Desc:   DescAllTime,
-		Value:  int(v1.NewAllTimeFrom(summaryAllTime).Data.TotalSeconds),
+		Value:  int64(v1.NewAllTimeFrom(summaryAllTime).Data.TotalSeconds),
 		Labels: []mm.Label{},
 	})
 
 	metrics = append(metrics, &mm.CounterMetric{
 		Name:   MetricsPrefix + "_seconds_total",
 		Desc:   DescTotal,
-		Value:  int(summaryToday.TotalTime().Seconds()),
+		Value:  int64(summaryToday.TotalTime().Seconds()),
 		Labels: []mm.Label{},
 	})
 
 	metrics = append(metrics, &mm.CounterMetric{
 		Name:   MetricsPrefix + "_heartbeats_total",
 		Desc:   DescHeartbeats,
-		Value:  int(heartbeatCount),
+		Value:  int64(heartbeatCount),
 		Labels: []mm.Label{},
 	})
 
@@ -163,7 +167,7 @@ func (h *MetricsHandler) getUserMetrics(user *models.User) (*mm.Metrics, error)
 		metrics = append(metrics, &mm.CounterMetric{
 			Name:   MetricsPrefix + "_project_seconds_total",
 			Desc:   DescProjects,
-			Value:  int(summaryToday.TotalTimeByKey(models.SummaryProject, p.Key).Seconds()),
+			Value:  int64(summaryToday.TotalTimeByKey(models.SummaryProject, p.Key).Seconds()),
 			Labels: []mm.Label{{Key: "name", Value: p.Key}},
 		})
 	}
@@ -172,7 +176,7 @@ func (h *MetricsHandler) getUserMetrics(user *models.User) (*mm.Metrics, error)
 		metrics = append(metrics, &mm.CounterMetric{
 			Name:   MetricsPrefix + "_language_seconds_total",
 			Desc:   DescLanguages,
-			Value:  int(summaryToday.TotalTimeByKey(models.SummaryLanguage, l.Key).Seconds()),
+			Value:  int64(summaryToday.TotalTimeByKey(models.SummaryLanguage, l.Key).Seconds()),
 			Labels: []mm.Label{{Key: "name", Value: l.Key}},
 		})
 	}
@@ -181,7 +185,7 @@ func (h *MetricsHandler) getUserMetrics(user *models.User) (*mm.Metrics, error)
 		metrics = append(metrics, &mm.CounterMetric{
 			Name:   MetricsPrefix + "_editor_seconds_total",
 			Desc:   DescEditors,
-			Value:  int(summaryToday.TotalTimeByKey(models.SummaryEditor, e.Key).Seconds()),
+			Value:  int64(summaryToday.TotalTimeByKey(models.SummaryEditor, e.Key).Seconds()),
 			Labels: []mm.Label{{Key: "name", Value: e.Key}},
 		})
 	}
@@ -190,7 +194,7 @@ func (h *MetricsHandler) getUserMetrics(user *models.User) (*mm.Metrics, error)
 		metrics = append(metrics, &mm.CounterMetric{
 			Name:   MetricsPrefix + "_operating_system_seconds_total",
 			Desc:   DescOperatingSystems,
-			Value:  int(summaryToday.TotalTimeByKey(models.SummaryOS, o.Key).Seconds()),
+			Value:  int64(summaryToday.TotalTimeByKey(models.SummaryOS, o.Key).Seconds()),
 			Labels: []mm.Label{{Key: "name", Value: o.Key}},
 		})
 	}
@@ -199,7 +203,7 @@ func (h *MetricsHandler) getUserMetrics(user *models.User) (*mm.Metrics, error)
 		metrics = append(metrics, &mm.CounterMetric{
 			Name:   MetricsPrefix + "_machine_seconds_total",
 			Desc:   DescMachines,
-			Value:  int(summaryToday.TotalTimeByKey(models.SummaryMachine, m.Key).Seconds()),
+			Value:  int64(summaryToday.TotalTimeByKey(models.SummaryMachine, m.Key).Seconds()),
 			Labels: []mm.Label{{Key: "name", Value: m.Key}},
 		})
 	}
@@ -208,7 +212,7 @@ func (h *MetricsHandler) getUserMetrics(user *models.User) (*mm.Metrics, error)
 		metrics = append(metrics, &mm.CounterMetric{
 			Name:   MetricsPrefix + "_label_seconds_total",
 			Desc:   DescLabels,
-			Value:  int(summaryToday.TotalTimeByKey(models.SummaryLabel, m.Key).Seconds()),
+			Value:  int64(summaryToday.TotalTimeByKey(models.SummaryLabel, m.Key).Seconds()),
 			Labels: []mm.Label{{Key: "name", Value: m.Key}},
 		})
 	}
@@ -220,21 +224,34 @@ func (h *MetricsHandler) getUserMetrics(user *models.User) (*mm.Metrics, error)
 	metrics = append(metrics, &mm.CounterMetric{
 		Name:   MetricsPrefix + "_goroutines_total",
 		Desc:   DescGoroutines,
-		Value:  runtime.NumGoroutine(),
+		Value:  int64(runtime.NumGoroutine()),
 		Labels: []mm.Label{},
 	})
 
 	metrics = append(metrics, &mm.CounterMetric{
 		Name:   MetricsPrefix + "_mem_alloc_total",
 		Desc:   DescMemAllocTotal,
-		Value:  int(memStats.Alloc),
+		Value:  int64(memStats.Alloc),
 		Labels: []mm.Label{},
 	})
 
 	metrics = append(metrics, &mm.CounterMetric{
 		Name:   MetricsPrefix + "_mem_sys_total",
 		Desc:   DescMemSysTotal,
-		Value:  int(memStats.Sys),
+		Value:  int64(memStats.Sys),
+		Labels: []mm.Label{},
+	})
+
+	// Database metrics
+	dbSize, err := h.metricsRepo.GetDatabaseSize()
+	if err != nil {
+		logbuch.Warn("failed to get database size (%v)", err)
+	}
+
+	metrics = append(metrics, &mm.CounterMetric{
+		Name:   MetricsPrefix + "_db_total_bytes",
+		Desc:   DescDatabaseSize,
+		Value:  dbSize,
 		Labels: []mm.Label{},
 	})
 
@@ -256,7 +273,7 @@ func (h *MetricsHandler) getAdminMetrics(user *models.User) (*mm.Metrics, error)
 	}
 
 	totalUsers, _ := h.userSrvc.Count()
-	totalHeartbeats, _ := h.heartbeatSrvc.Count()
+	totalHeartbeats, _ := h.heartbeatSrvc.Count(true)
 
 	activeUsers, err := h.userSrvc.GetActive(false)
 	if err != nil {
@@ -267,28 +284,28 @@ func (h *MetricsHandler) getAdminMetrics(user *models.User) (*mm.Metrics, error)
 	metrics = append(metrics, &mm.CounterMetric{
 		Name:   MetricsPrefix + "_admin_seconds_total",
 		Desc:   DescAdminTotalTime,
-		Value:  totalSeconds,
+		Value:  int64(totalSeconds),
 		Labels: []mm.Label{},
 	})
 
 	metrics = append(metrics, &mm.CounterMetric{
 		Name:   MetricsPrefix + "_admin_heartbeats_total",
 		Desc:   DescAdminTotalHeartbeats,
-		Value:  int(totalHeartbeats),
+		Value:  totalHeartbeats,
 		Labels: []mm.Label{},
 	})
 
 	metrics = append(metrics, &mm.CounterMetric{
 		Name:   MetricsPrefix + "_admin_users_total",
 		Desc:   DescAdminTotalUsers,
-		Value:  int(totalUsers),
+		Value:  totalUsers,
 		Labels: []mm.Label{},
 	})
 
 	metrics = append(metrics, &mm.CounterMetric{
 		Name:   MetricsPrefix + "_admin_users_active_total",
 		Desc:   DescAdminActiveUsers,
-		Value:  len(activeUsers),
+		Value:  int64(len(activeUsers)),
 		Labels: []mm.Label{},
 	})
 
@@ -304,7 +321,7 @@ func (h *MetricsHandler) getAdminMetrics(user *models.User) (*mm.Metrics, error)
 		metrics = append(metrics, &mm.CounterMetric{
 			Name:   MetricsPrefix + "_admin_user_heartbeats_total",
 			Desc:   DescAdminUserHeartbeats,
-			Value:  int(uc.Count),
+			Value:  uc.Count,
 			Labels: []mm.Label{{Key: "user", Value: uc.User}},
 		})
 	}

scripts/aggregate_durations.sql

@@ -0,0 +1,9 @@
+SELECT project, language, editor, operating_system, machine, branch, SUM(GREATEST(1, diff)) as 'sum'
+FROM (
+         SELECT project, language, editor, operating_system, machine, branch, TIME_TO_SEC(LEAST(TIMEDIFF(time, LAG(time) over w), '00:02:00')) as 'diff'
+         FROM heartbeats
+         WHERE user_id = 'n1try'
+             WINDOW w AS (ORDER BY time)
+     ) s2
+WHERE diff IS NOT NULL
+GROUP BY project, language, editor, operating_system, machine, branch;

scripts/clean_duplicates.sql

@@ -0,0 +1,12 @@
+DELETE t1
+FROM heartbeats t1
+         INNER JOIN heartbeats t2
+WHERE t1.id < t2.id
+  AND t1.time = t2.time
+  AND t1.entity = t2.entity
+  AND t1.is_write = t2.is_write
+  AND t1.branch = t2.branch
+  AND t1.editor = t2.editor
+  AND t1.machine = t2.machine
+  AND t1.operating_system = t2.operating_system
+  AND t1.user_id = t2.user_id;

scripts/count_duplicates_by_user.sql

@@ -0,0 +1,10 @@
+SELECT s2.user_id, sum(c) as count, total, (sum(c) / total) as ratio
+FROM (
+         SELECT time, user_id, entity, is_write, branch, editor, machine, operating_system, COUNT(time) as c
+         FROM heartbeats
+         GROUP BY time, user_id, entity, is_write, branch, editor, machine, operating_system
+         HAVING COUNT(time) > 1
+     ) s2
+         LEFT JOIN (SELECT user_id, count(id) AS total FROM heartbeats GROUP BY user_id) s3 ON s2.user_id = s3.user_id
+GROUP BY user_id
+ORDER BY count DESC;

services/duration.go

@@ -36,6 +36,8 @@ func (srv *DurationService) Get(from, to time.Time, user *models.User, filters *
 	}
 
 	// Aggregation
+	// the below logic is approximately equivalent to the SQL query at scripts/aggregate_durations.sql,
+	// but unfortunately we cannot use it, as it features mysql-specific functions (lag(), timediff(), ...)
 	var count int
 	var latest *models.Duration
 
@@ -80,12 +82,20 @@ func (srv *DurationService) Get(from, to time.Time, user *models.User, filters *
 
 	for _, list := range mapping {
 		for _, d := range list {
+			// will only happen if two heartbeats with different hashes (e.g. different project) have the same timestamp
+			// that, in turn, will most likely only happen for mysql, where `time` column's precision was set to second for a while
+			// assume that two non-identical heartbeats with identical time are sub-second apart from each other, so round up to expectancy value
+			// also see https://github.com/muety/wakapi/issues/340
 			if d.Duration == 0 {
-				d.Duration = HeartbeatDiffThreshold
+				d.Duration = 500 * time.Millisecond
 			}
 			durations = append(durations, d)
 		}
 	}
 
+	if len(heartbeats) == 1 && len(durations) == 1 {
+		durations[0].Duration = HeartbeatDiffThreshold
+	}
+
 	return durations.Sorted(), nil
 }

services/duration_test.go

@@ -65,6 +65,17 @@ func (suite *DurationServiceTestSuite) SetupSuite() {
 			Machine:         TestMachine1,
 			Time:            models.CustomTime(suite.TestStartTime.Add(30 * time.Second)), // 0:30
 		},
+		// duplicate of previous one
+		{
+			ID:              rand.Uint64(),
+			UserID:          TestUserId,
+			Project:         TestProject1,
+			Language:        TestLanguageGo,
+			Editor:          TestEditorGoland,
+			OperatingSystem: TestOsLinux,
+			Machine:         TestMachine1,
+			Time:            models.CustomTime(suite.TestStartTime.Add(30 * time.Second)), // 0:30
+		},
 		{
 			ID:              rand.Uint64(),
 			UserID:          TestUserId,
@@ -160,7 +171,7 @@ func (suite *DurationServiceTestSuite) TestDurationService_Get() {
 	assert.Equal(suite.T(), TestEditorGoland, durations[0].Editor)
 	assert.Equal(suite.T(), TestEditorGoland, durations[1].Editor)
 	assert.Equal(suite.T(), TestEditorVscode, durations[2].Editor)
-	assert.Equal(suite.T(), 2, durations[0].NumHeartbeats)
+	assert.Equal(suite.T(), 3, durations[0].NumHeartbeats)
 	assert.Equal(suite.T(), 1, durations[1].NumHeartbeats)
 	assert.Equal(suite.T(), 3, durations[2].NumHeartbeats)
 }

services/heartbeat.go

@@ -73,12 +73,12 @@ func (srv *HeartbeatService) InsertBatch(heartbeats []*models.Heartbeat) error {
 	return err
 }
 
-func (srv *HeartbeatService) Count() (int64, error) {
+func (srv *HeartbeatService) Count(approximate bool) (int64, error) {
 	result, ok := srv.cache.Get(srv.countTotalCacheKey())
 	if ok {
 		return result.(int64), nil
 	}
-	count, err := srv.repository.Count()
+	count, err := srv.repository.Count(approximate)
 	if err == nil {
 		srv.cache.Set(srv.countTotalCacheKey(), count, srv.countCacheTtl())
 	}

services/services.go

@@ -29,7 +29,7 @@ type IAliasService interface {
 type IHeartbeatService interface {
 	Insert(*models.Heartbeat) error
 	InsertBatch([]*models.Heartbeat) error
-	Count() (int64, error)
+	Count(bool) (int64, error)
 	CountByUser(*models.User) (int64, error)
 	CountByUsers([]*models.User) ([]*models.CountByUser, error)
 	GetAllWithin(time.Time, time.Time, *models.User) ([]*models.Heartbeat, error)

version.txt

@@ -1 +1 @@
-2.3.0
+2.3.1