diff --git a/packages/clickhouse/migrations/20260417120000_ttl_only_drop_parts.sql b/packages/clickhouse/migrations/20260417120000_ttl_only_drop_parts.sql
new file mode 100644
index 0000000000..b7241f99a9
--- /dev/null
+++ b/packages/clickhouse/migrations/20260417120000_ttl_only_drop_parts.sql
@@ -0,0 +1,17 @@
+-- +goose Up
+-- Enable ttl_only_drop_parts on all local MergeTree tables.
+-- Since all tables use PARTITION BY toDate(timestamp), TTL boundaries align
+-- with part boundaries. This avoids expensive part rewrites during TTL
+-- cleanup -- ClickHouse will drop entire parts instead.
+ALTER TABLE sandbox_metrics_gauge_local MODIFY SETTING ttl_only_drop_parts = 1;
+ALTER TABLE team_metrics_gauge_local MODIFY SETTING ttl_only_drop_parts = 1;
+ALTER TABLE team_metrics_sum_local MODIFY SETTING ttl_only_drop_parts = 1;
+ALTER TABLE sandbox_events_local MODIFY SETTING ttl_only_drop_parts = 1;
+ALTER TABLE sandbox_host_stats_local MODIFY SETTING ttl_only_drop_parts = 1;
+
+-- +goose Down
+ALTER TABLE sandbox_metrics_gauge_local RESET SETTING ttl_only_drop_parts;
+ALTER TABLE team_metrics_gauge_local RESET SETTING ttl_only_drop_parts;
+ALTER TABLE team_metrics_sum_local RESET SETTING ttl_only_drop_parts;
+ALTER TABLE sandbox_events_local RESET SETTING ttl_only_drop_parts;
+ALTER TABLE sandbox_host_stats_local RESET SETTING ttl_only_drop_parts;