Annotations: Make the annotation clean up batch size configurable (#31487)

Signed-off-by: bergquist <carl.bergquist@gmail.com>

Co-authored-by: Diana Payton <52059945+oddlittlebird@users.noreply.github.com>

pkg/services/sqlstore/sqlstore.go

@@ -105,7 +105,7 @@ func (ss *SQLStore) Init() error {
 
 	// Init repo instances
 	annotations.SetRepository(&SQLAnnotationRepo{})
-	annotations.SetAnnotationCleaner(&AnnotationCleanupService{batchSize: 100, log: log.New("annotationcleaner")})
+	annotations.SetAnnotationCleaner(&AnnotationCleanupService{batchSize: ss.Cfg.AnnotationCleanupJobBatchSize, log: log.New("annotationcleaner")})
 	ss.Bus.SetTransactionManager(ss)
 
 	// Register handlers

pkg/setting/setting.go

@@ -317,6 +317,7 @@ type Cfg struct {
 	HiddenUsers           map[string]struct{}
 
 	// Annotations
+	AnnotationCleanupJobBatchSize      int64
 	AlertingAnnotationCleanupSetting   AnnotationCleanupSettings
 	DashboardAnnotationCleanupSettings AnnotationCleanupSettings
 	APIAnnotationCleanupSettings       AnnotationCleanupSettings
@@ -473,6 +474,9 @@ func (cfg *Cfg) readGrafanaEnvironmentMetrics() error {
 }
 
 func (cfg *Cfg) readAnnotationSettings() {
+	section := cfg.Raw.Section("annotations")
+	cfg.AnnotationCleanupJobBatchSize = section.Key("cleanupjob_batchsize").MustInt64(100)
+
 	dashboardAnnotation := cfg.Raw.Section("annotations.dashboard")
 	apiIAnnotation := cfg.Raw.Section("annotations.api")
 	alertingSection := cfg.Raw.Section("alerting")