diff --git a/db/post_migrate/20211214012507_backfill_incident_issue_escalation_statuses.rb b/db/post_migrate/20211214012507_backfill_incident_issue_escalation_statuses.rb
index e857ede7304af4cb5d9971557186b9f21f7883cd..7f0168be1a4435e23e1a6a8e450b85ac0fd13301 100644
--- a/db/post_migrate/20211214012507_backfill_incident_issue_escalation_statuses.rb
+++ b/db/post_migrate/20211214012507_backfill_incident_issue_escalation_statuses.rb
@@ -3,7 +3,7 @@
 class BackfillIncidentIssueEscalationStatuses < Gitlab::Database::Migration[1.0]
   MIGRATION = 'BackfillIncidentIssueEscalationStatuses'
   DELAY_INTERVAL = 2.minutes
-  BATCH_SIZE = 50_000
+  BATCH_SIZE = 20_000
 
   disable_ddl_transaction!