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yulihua49 发表于 2014-3-15 15:45 ![]()
报告新进展。
单独的多线程加载器已经做好,在单节点上与sqlldr的直接路径模式一样快。
先前说的达到1. ...
谁说sqlldr不能并行直接路径加载?
http://docs.oracle.com/cd/B19306 ... _modes.htm#i1008225
Intrasegment Concurrency with Direct Path
SQL*Loader permits multiple, concurrent sessions to perform a direct path load into the same table, or into the same partition of a partitioned table. Multiple SQL*Loader sessions improve the performance of a direct path load given the available resources on your system.
This method of data loading is enabled by setting both the DIRECT and the PARALLEL parameters to true, and is often referred to as a parallel direct path load.
此外,存储过程的优势在于作为SQL的一种粘合剂,如果是这种数据加载、卸载、毫无技术含量的SELECT *, 它的效率当然体现不出来。我在本例使用存储过程,只是因为易于实现。 |
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