best practice to update statistics Data warehouse

RDBMS 12c Rac

Hello

I would like to know what is the best way to gather statistics is a data Warehouse database some tables are static others no, currently we gather stats using the following command, however takes a very long time:

set timing on

set serveroutput on

begin

DBMS_STATS.GATHER_SCHEMA_STATS(ownname=>NULL,estimate_percent=>95, cascade=>TRUE);

end;

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