Reduce finalization migration frequency

beacon_node/src/config.rs

@@ -366,6 +366,11 @@ pub fn get_config<E: EthSpec>(
         client_config.store.prune_payloads = prune_payloads;
     }
 
+    if let Some(epochs_per_migration) = clap_utils::parse_optional(cli_args, "db-migration-period")?
+    {
+        client_config.store_migrator.epochs_per_run = epochs_per_migration;
+    }
+
     /*
      * Zero-ports
      *