RAWDEVSIZE程序分析可用原始设备,并将空闲块的偏移量、大小和路径信息存储到一个名为free_chunks的数据库表中。
The RAWDEVSIZE program analyzes available raw devices and stores the offset, size, and path information of free blocks into a database table named free_chunks.
您可以从基础访问路径图中的表节点的表描述符处获得该统计信息。
You can obtain the statistics from the table descriptor of the table node in the underlying access path graph.
优化器使用表大小、索引可用性以及数据分布等信息来确定响应该查询的最佳路径。
The optimizer USES information such as table sizes, availability of indexes, and data distribution to figure out the optimal way to answer the query.
为了正确地评估这些访问路径,需要从DB 2编目中获取关于查询访问的表以及这些表上定义的索引的信息。
To properly assess these access path alternatives, you'll need information from the DB2 catalog about the tables accessed by the query and the indexes defined on those tables.
即使表的行数保持一致,使用由RUNSTATS更新的统计信息来更改数据内容可以产生不同的、也许更好的访问路径。
Even if the number of rows in a table remains consistent, changes in data contents can result in different, and hopefully better, access paths using statistics updated by RUNSTATS.
该算法直接利用前一周期的时延信息来更新路由表,以作为当前寻找路径的依据,在满足带宽和时延波动约束条件下,使数据传送过程时延最小化。
It can refresh the router table by the previous delay information to find a suitable path with the constraints of the bandwidth and the delay-jitter.
讨论了一种地理信息系统空间分析算法——最短路径分析,然后利用最短路径结果,采用表上作业法将灾害救援物资进行优化,给出最优调运方案。
Then it optimized the rescue supplies using form operation method based on the result of the shortest path, and selected the optimal transportation scheme.
讨论了一种地理信息系统空间分析算法——最短路径分析,然后利用最短路径结果,采用表上作业法将灾害救援物资进行优化,给出最优调运方案。
Then it optimized the rescue supplies using form operation method based on the result of the shortest path, and selected the optimal transportation scheme.
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