分类: Oracle
2010-06-17 14:42:15
在Oracle10g中,有两个后台进程是新增的,这里我想说的是MMON和MMNL.
在Oracle不同的文档中,对这两个进程的解释存在歧义。
MMON 应该是 Memory Monitor 的缩写,但是在有的文档中被记录为Manageability Monitor ,这应当是10g早期版本中的称呼,只不过后来发生了变更。
这个进程的主要作用如下:
The memory monitor (MMON) process was introduced in 10g and is associated with the Automatic Workload Repository new features used for automatic problem detection and self-tuning. MMON writes out the required statistics for AWR on a scheduled basis.
另外一个进程是 MMNL ,是 Memory Monitor Light (MMNL) 的缩写,在部分文档中记录为 Manageability Monitor Light .
这个进程的作用如下:
The Memory Monitor Light (MMNL) process is a new process in 10g which works with the Automatic Workload Repository new features (AWR) to write out full statistics buffers to disk as needed.