关于ora_lms3~5_sid这个进程耗内存资源问题。
本帖最后由 smile_jackchen 于 2015-4-7 14:25 编辑服务器是11g的rac,3个节点,其中1节点和3节点都比较正常,2节点ora_lms3~5_sid这个进程耗内存资源。内存几乎用到100%。节点2上是部署的ogg复制进程,节点1也有,但是内存消耗不高。请解释下这种情况和这几个进程是做什么的,能否优化。
Global Cache Service Processes (LMSn)
The processes that handle remote Global Cache Service (GCS) messages. Real Application Clusters provides for up to 10 Global Cache Service Processes. The number of LMSn varies depending on the amount of messaging traffic amount the nodes in the cluster. The LMSn handle the acquisition interrupt and blocking interrupt requests from a remote instance for Global Cache Service resources. For cross-instance consistent read requests, LMSn creates a consistent read version of the block and sends it to the requesting instance. LMSn also controls the flow of messages to and from remote instances.
在这个文档中,Oracle将LMS重新定义为Global Cache Service Processes ,因为在9iRAC中,Oracle引入了大量Service的概念,所以LMS称为 Global Cache Service Processes 就更为合适一些,于是潜移默化的改变发生了,而且LMS的本意在新的定义中已经看不出来。
你的数据库sga配置多大,这个应该是和sga大小一样,你看到的是含了共享内存段,你可以通过pmap去分析具体内存占用 参考:http://www.xifenfei.com/2011/11/linux%E4%B9%8Bpmap%E5%91%BD%E4%BB%A4.html
页:
[1]