吾生有涯,而知无涯,适当止学.循序渐进,步步提升 Talk is cheap, show me the code.
分类: Oracle
2017-12-28 09:20:27
Synchronous I/O |
Asynchronous I/O |
|
Buffered I/O | none | asynch |
Direct I/O | directIO | setall |
平台 | filesystemio_options的默认配置 | Notes |
Linux | none | Oracle only supports native Linux asynchronous I/O, which requires also using direct I/O. So disabling direct I/O also disables asynchronous I/O: filesystemio_options=asynch will not enable asynchronous I/O. Note that older Linux kernels do not support native asynchronous I/O. |
ASM文件系统 | 对于ASM,Oracle会直接跳过文件系统层面,filesystemio_options 参数是无作用的 ,direct I/O总是被使用 |