Be sure to work with your DBA to ensure you accumulate statistics at the appropriate time, especially in a production environment.
一定要与您的dba一起工作以确保在适当的时候积累统计信息，尤其是在生产环境中。
Appropriate relative timing of formation of these elements and the processes of generation, migration and accumulation are necessary for hydrocarbons to accumulate and be preserved.
适当的这些要素形成的相关时间及生成作用、运移和聚集作用的过程是烃类聚集和保存所必需的。
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