diff --git a/internal/graph/schema.resolvers.go b/internal/graph/schema.resolvers.go
index bf9c6e7..571a8b9 100644
--- a/internal/graph/schema.resolvers.go
+++ b/internal/graph/schema.resolvers.go
@@ -32,32 +32,15 @@ func (r *jobResolver) Tags(ctx context.Context, obj *schema.Job) ([]*schema.Tag,
 }
 
 // ConcurrentJobs is the resolver for the concurrentJobs field.
-func (r *jobResolver) ConcurrentJobs(ctx context.Context, obj *schema.Job) (*model.JobLinkResultList, error) {
-	exc := int(obj.Exclusive)
-	if exc != 1 {
-		filter := []*model.JobFilter{}
-		jid := fmt.Sprint(obj.JobID)
-		jdu := int(obj.Duration)
-		filter = append(filter, &model.JobFilter{Exclusive: &exc})
-		filter = append(filter, &model.JobFilter{SharedNode: &model.StringInput{Contains: &obj.Resources[0].Hostname}})
-		filter = append(filter, &model.JobFilter{SelfJobID: &model.StringInput{Neq: &jid}})
-		filter = append(filter, &model.JobFilter{SelfStartTime: &obj.StartTime, SelfDuration: &jdu})
+func (r *jobResolver) ConcurrentJobs(
+	ctx context.Context, obj *schema.Job) (*model.JobLinkResultList, error) {
 
-		jobLinks, err := r.Repo.QueryJobLinks(ctx, filter)
-		if err != nil {
-			log.Warn("Error while querying jobLinks")
-			return nil, err
-		}
+	if obj.State == schema.JobStateRunning {
+		obj.Duration = int32(time.Now().Unix() - obj.StartTimeUnix)
+	}
 
-		count, err := r.Repo.CountJobs(ctx, filter)
-		if err != nil {
-			log.Warn("Error while counting jobLinks")
-			return nil, err
-		}
-
-		result := &model.JobLinkResultList{Items: jobLinks, Count: &count}
-
-		return result, nil
+	if obj.Exclusive != 1 && obj.Duration > 600 {
+		return r.Repo.FindConcurrentJobs(ctx, obj)
 	}
 
 	return nil, nil
diff --git a/internal/repository/job.go b/internal/repository/job.go
index 2ceab95..504e34e 100644
--- a/internal/repository/job.go
+++ b/internal/repository/job.go
@@ -291,6 +291,97 @@ func (r *JobRepository) FindById(jobId int64) (*schema.Job, error) {
 	return scanJob(q.RunWith(r.stmtCache).QueryRow())
 }
 
+func (r *JobRepository) FindConcurrentJobs(
+	ctx context.Context,
+	job *schema.Job) (*model.JobLinkResultList, error) {
+	if job == nil {
+		return nil, nil
+	}
+
+	query, qerr := SecurityCheck(ctx, sq.Select("job.id", "job.job_id").From("job"))
+	if qerr != nil {
+		return nil, qerr
+	}
+
+	query = query.Where("cluster = ?", job.Cluster)
+	var startTime int64
+	var stopTime int64
+
+	startTime = job.StartTimeUnix
+
+	if job.State == schema.JobStateRunning {
+		stopTime = time.Now().Unix()
+	} else {
+		stopTime = startTime + int64(job.Duration)
+	}
+
+	// Add 5m overlap for jobs start time at the end
+	stopTimeTail := stopTime - 300
+	startTimeTail := startTime + 10
+	startTimeFront := startTime + 300
+
+	queryRunning := query.Where("job.job_state = ?").Where("(job.start_time BETWEEN ? AND ?) OR (job.start_time < ?))",
+		"running", startTimeTail, stopTimeTail, startTime)
+
+	query = query.Where("job.job_state != ?").Where("(job.start_time BETWEEN ? AND ?) OR ((job.start_time + job.duration) BETWEEN ? AND ?) OR ((job.start_time < ?) AND ((job.start_time + job.duration)) > ?)",
+		"running", startTimeTail, stopTimeTail, startTimeFront, stopTime, startTime, stopTime)
+
+	rows, err := query.RunWith(r.stmtCache).Query()
+	if err != nil {
+		log.Errorf("Error while running query: %v", err)
+		return nil, err
+	}
+
+	items := make([]*model.JobLink, 0, 10)
+
+	for rows.Next() {
+		var id, jobId sql.NullInt64
+
+		if err = rows.Scan(&id, &jobId); err != nil {
+			log.Warn("Error while scanning rows")
+			return nil, err
+		}
+
+		if id.Valid {
+			items = append(items,
+				&model.JobLink{
+					ID:    fmt.Sprint(id),
+					JobID: int(jobId.Int64),
+				})
+		}
+	}
+
+	rows, err = queryRunning.RunWith(r.stmtCache).Query()
+	if err != nil {
+		log.Errorf("Error while running query: %v", err)
+		return nil, err
+	}
+
+	for rows.Next() {
+		var id, jobId sql.NullInt64
+
+		if err := rows.Scan(&id, &jobId); err != nil {
+			log.Warn("Error while scanning rows")
+			return nil, err
+		}
+
+		if id.Valid {
+			items = append(items,
+				&model.JobLink{
+					ID:    fmt.Sprint(id),
+					JobID: int(jobId.Int64),
+				})
+		}
+	}
+
+	cnt := len(items)
+
+	return &model.JobLinkResultList{
+		Items: items,
+		Count: &cnt,
+	}, nil
+}
+
 // Start inserts a new job in the table, returning the unique job ID.
 // Statistics are not transfered!
 func (r *JobRepository) Start(job *schema.JobMeta) (id int64, err error) {
diff --git a/internal/repository/query.go b/internal/repository/query.go
index 56ba173..5cebf1d 100644
--- a/internal/repository/query.go
+++ b/internal/repository/query.go
@@ -48,16 +48,9 @@ func (r *JobRepository) queryJobs(
 		query = BuildWhereClause(f, query)
 	}
 
-	sql, args, err := query.ToSql()
-	if err != nil {
-		log.Warn("Error while converting query to sql")
-		return nil, err
-	}
-
-	log.Debugf("SQL query: `%s`, args: %#v", sql, args)
 	rows, err := query.RunWith(r.stmtCache).Query()
 	if err != nil {
-		log.Error("Error while running query")
+		log.Errorf("Error while running query: %v", err)
 		return nil, err
 	}
 
@@ -92,7 +85,6 @@ func (r *JobRepository) QueryJobs(
 	order *model.OrderByInput) ([]*schema.Job, error) {
 
 	query, qerr := SecurityCheck(ctx, sq.Select(jobColumns...).From("job"))
-
 	if qerr != nil {
 		return nil, qerr
 	}
@@ -100,62 +92,6 @@ func (r *JobRepository) QueryJobs(
 	return r.queryJobs(query, filters, page, order)
 }
 
-// SecurityCheck-less, private: returns a list of minimal job information (DB-ID and jobId) of shared jobs for link-building based the provided filters.
-func (r *JobRepository) queryJobLinks(
-	query sq.SelectBuilder,
-	filters []*model.JobFilter) ([]*model.JobLink, error) {
-
-	for _, f := range filters {
-		query = BuildWhereClause(f, query)
-	}
-
-	sql, args, err := query.ToSql()
-	if err != nil {
-		log.Warn("Error while converting query to sql")
-		return nil, err
-	}
-
-	log.Debugf("SQL query: `%s`, args: %#v", sql, args)
-	rows, err := query.RunWith(r.stmtCache).Query()
-	if err != nil {
-		log.Error("Error while running query")
-		return nil, err
-	}
-
-	jobLinks := make([]*model.JobLink, 0, 50)
-	for rows.Next() {
-		jobLink, err := scanJobLink(rows)
-		if err != nil {
-			rows.Close()
-			log.Warn("Error while scanning rows (JobLinks)")
-			return nil, err
-		}
-		jobLinks = append(jobLinks, jobLink)
-	}
-
-	return jobLinks, nil
-}
-
-// testFunction for queryJobLinks
-func (r *JobRepository) testQueryJobLinks(
-	filters []*model.JobFilter) ([]*model.JobLink, error) {
-
-	return r.queryJobLinks(sq.Select(jobColumns...).From("job"), filters)
-}
-
-func (r *JobRepository) QueryJobLinks(
-	ctx context.Context,
-	filters []*model.JobFilter) ([]*model.JobLink, error) {
-
-	query, qerr := SecurityCheck(ctx, sq.Select("job.id", "job.job_id").From("job"))
-
-	if qerr != nil {
-		return nil, qerr
-	}
-
-	return r.queryJobLinks(query, filters)
-}
-
 // SecurityCheck-less, private: Returns the number of jobs matching the filters
 func (r *JobRepository) countJobs(query sq.SelectBuilder,
 	filters []*model.JobFilter) (int, error) {
@@ -164,13 +100,6 @@ func (r *JobRepository) countJobs(query sq.SelectBuilder,
 		query = BuildWhereClause(f, query)
 	}
 
-	sql, args, err := query.ToSql()
-	if err != nil {
-		log.Warn("Error while converting query to sql")
-		return 0, nil
-	}
-
-	log.Debugf("SQL query: `%s`, args: %#v", sql, args)
 	var count int
 	if err := query.RunWith(r.DB).Scan(&count); err != nil {
 		return 0, err
@@ -291,21 +220,6 @@ func BuildWhereClause(filter *model.JobFilter, query sq.SelectBuilder) sq.Select
 	if filter.MemUsedMax != nil {
 		query = buildFloatCondition("job.mem_used_max", filter.MemUsedMax, query)
 	}
-	// Shared Jobs Query
-	if filter.Exclusive != nil {
-		query = query.Where("job.exclusive = ?", *filter.Exclusive)
-	}
-	if filter.SharedNode != nil {
-		query = buildStringCondition("job.resources", filter.SharedNode, query)
-	}
-	if filter.SelfJobID != nil {
-		query = buildStringCondition("job.job_id", filter.SelfJobID, query)
-	}
-	if filter.SelfStartTime != nil && filter.SelfDuration != nil {
-		start := filter.SelfStartTime.Unix() + 10 // There does not seem to be a portable way to get the current unix timestamp accross different DBs.
-		end := start + int64(*filter.SelfDuration) - 20
-		query = query.Where("((job.start_time BETWEEN ? AND ?) OR ((job.start_time + job.duration) BETWEEN ? AND ?))", start, end, start, end)
-	}
 	return query
 }