Data remains in the performance database forever unless you delete it manually.
只要不手动删除这些数据，它们就会永远保留在性能数据库中。
To disable Performance Expert Server from collecting data, connect to the performance database and issue one of the following commands
要想禁止PerformanceExpert服务器收集数据，应该连接性能数据库，然后执行以下命令之一
If you use the long-term history, start a DB2 statement event monitor to collect SQL event monitor data and to store the collected data in the performance database of the performance Expert server.
如果使用长期历史，可以启动db2语句事件监视器来收集SQL事件监视器数据，并把收集的数据存储到PerformanceExpert服务器的性能数据库中。
Asphalt pavement performance database and rich text maintenance strategy information database are employed by reasoning mechanism.
基于关系数据库建立了沥青路面使用性能数据库，采用图文格式建立了养护维修知识库；
Asphalt pavement performance database and rich text maintenance strategy information database are employed by reasoning mechanism.
基于关系数据库建立了沥青路面使用性能数据库，采用图文格式建立了养护维修知识库；
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