diff --git a/iox_catalog/migrations/20230707195110_add_created_at_index.sql b/iox_catalog/migrations/20230707195110_add_created_at_index.sql
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index 0000000000..3445ee01ba
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+-- Add to help the compactor when it searches for partitions with files created recently.
+
+-- By default we often only have 5min to finish our statements. The `CREATE INDEX CONCURRENTLY` however takes longer.
+-- In our prod test this took about 15min, but better be safe than sorry.
+-- IOX_NO_TRANSACTION
+SET statement_timeout TO '60min';
+
+-- IOX_STEP_BOUNDARY
+
+-- While `CONCURRENTLY` means it runs parallel to other writes, this command will only finish after the index was
+-- successfully built.
+-- IOX_NO_TRANSACTION
+CREATE INDEX CONCURRENTLY IF NOT EXISTS partition_new_file_at_idx ON partition (new_file_at);