Oracle 参数 ASM_IO_PROCESSES 官方解释,作用,如何配置最优化建议
本站中文解释
:
ASM_IO_PROCESSES参数定义应用程序的活动进程数量。它的值应该足以满足当前实例 需要的最大负荷,但又不会超过系统允许的最大会话数量。
正确设置此参数值的方法是在正常实际工作负荷下检测参数 ASM_IO_PROCESSES 的是否较低(尤其是在数据库压力大时),根据用户实际使用情况进行适当调整,一般建议增强1到2倍,但也不可超过系统允许的最大会话数量,否则容易导致数据库的崩溃和性能下降。
官方英文解释
ASM_IO_PROCESSES
specifies the number of I/O worker processes to be started in an Oracle IOServer instance.
Property | Description |
---|---|
Parameter type |
Integer |
Default value |
|
Modifiable |
|
Modifiable in a PDB |
No |
Range of values |
|
Basic |
No |
Oracle RAC |
Multiple instances can have different values. |
This parameter is applicable only in an Oracle IOServer instance, which runs out of an Oracle Grid Infrastructure home.
The default value should work in most cases. However, under heavy I/O load, there may be some delays associated with posting processes out of I/O waits. In this case, a slightly higher value than the default may be appropriate.