u012232730的博客

STATISTICS_LEVELSet this parameters to TYPICAL(default) or ALL to enable statistics gathering by AWR.Setting STATISTICS_LEVEL to BASIC disables many database features,including AWR ,and is not recom...

一、AWR报告 AWR 是通过对比两次快照(snapshot)收集到的统计信息，来生成报表数据，生成的报表包括多个部分，这点与Statspack生成的报告非常类似。不过AWR在生成报告时，可以选择生成TXT或HTML两种格式的报告，相对来说，HTML更利于阅读，而TXT的适用性更广(即使在不能使用浏览器的机器上也能看)。 操作过Statspack的朋友都还记的，生...

一、重要参数介绍：DB Time：Amount of elapsed time (in microseconds) spent performing Database user-level calls. This does not include the elapsed time spent on instance background processes such as PMON.说明：...