The optimizer ACTS based on statistical data about the number of rows in a table, the use of space by a table or index, and other information.
优化器的操作基于数据表中的行数、数据表或索引使用的空间以及其他信息的相关统计数据。
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Figure 25 depicts both graphical and statistical representations of the space utilization by different types of dbspaces — DATA space, TEMP space and BLOB space.
In this paper, the bounds on the rate of uniform convergence of the learning processes on possibility space are discussed based on the classic Statistical learning Theory.