Does GATHER_STATS_JOB gather all objects' stats every time?
周五在一家客户的调优会议中讨论了一个由于统计信息陈旧导致SQL执行计划偏差的问题，这是一个10g的库并且禁用了自动收集统计信息的定时作业GATHER_STATS_JOB；当问及应用程序开发商为何要禁用自动统计信息收集时，开发商的一位工程师说因为该库的数据量较大，考虑到该JOB每天都会将所有大表统计一遍可能要花费大量时间所以予以停用。 这里就存在一个问题，GATHER_STATS_JOB自动统计作业
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相关文章
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