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本帖最后由 tomroom 于 2010-09-13 16:34 编辑
关心 如果该OBJ 是表,需要更改其中记录会发生怎样情况 。ibm infornation center文档没有说明
IBM 说setOBJACC 之后update 会被handle
1.3 How Things Work with SETOBJACC and CLRPOOL 1 There will be few, if any, database reads once the file has been preloaded using SETOBJACC . Database writes will still be handled the same way. Database writes are usually done asynchronously to the user's job by system output tasks. Because database reads are processed much faster once a file is preloaded, database writes will be done more frequently by a program that is also doing updates, adds, or deletes. This might cause occasional overrun of the system output tasks, resulting in more database writes being done synchronously rather than asynchronously to the user's job. Therefore, the job might not perform as well as expected. However, the job will still be faster when using SETOBJACC . |
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