solaris 8 / oracle 8.1.7.4.0 , 机器上4G内存,
当在库里执行状态查询时:
SQL>; select * from v$waitstat;
CLASS COUNT TIME
------------------ ---------- ----------
data block 164294 0
system undo block 0 0
undo header 3 0
undo block 15 0
请问是不是数据的DBWR不够用了? 那DB_WRITER_PROCESSES 和DBWR_IO_SLAVES 我应该用哪个呢? 怎么设置呢?
多谢啦作者: txfy 时间: 2003-12-04 11:28 标题: 请教:DB_WRITER_PROCESSES .vs. DBWR_IO_SLAVES ? 这两个不能同时应用，主要看你的cpu颗数了！
-- If the buffer cache is very large (100,000 buffers and up) and the application is write intensive, then db_writer_processes may be beneficial. Note, the number of writer processes should not exceed the number of CPUs.
-- If the application is not very write intensive (or even a DSS system) and async I/O is available, then consider a single DBWR writer process; If async I/O is not available then use dbwr_io_slaves.
-- If the system is a uniprocessor(1 CPU) then implement may want to use dbwr_io_slaves.