oem 监控mertic参数疑问

fluttersnow

OEM : 12.1.0.2
Target： 10.2.0.4 rac

最近刚添加rac 数据库为监控对象，设置邮件提醒，老是收到如下警告：

EM Event: Critical:test_dingcan_INST1 - Metrics "Global Cache Average Current Get Time" is at 2.125
EM Event: Critical:bfsty_crs_bfsty1 - Metrics "Global Cache Average CR Get Time" is at 1.256

查阅文档：
http://docs.oracle.com/cd/E24628_01/em.121/e25160/oracle_database.htm#autoId140

没有完全匹配的解释，现有2个问题：

1.这2个参数值应该怎么理解？是否是说明2节点之间通信有问题？

2.现在这个告警的值是否在正常范围之内？几乎所有添加的rac数据库都会收到这个警告？如果是正常范围，我应该把metric调整到多少适合？

fluttersnow

补一个邮件提醒全部内容：

Categories=Performance
Message=Metrics "Global Cache Average CR Get Time" is at 13.421
Severity=Critical
Event reported time=Jan 28, 2013 7:47:27 AM CST
Operating System=Linux
Platform=x86_64
Associated Incident Id=1166
Associated Incident Status=New
Associated Incident Owner=
Associated Incident Acknowledged By Owner=No
Associated Incident Priority=None
Associated Incident Escalation Level=0
Event Type=Metric Alert
Event name=rac_global_cache:cr_request_cs
Metric Group=Global Cache Statistics
Metric=Global Cache Average CR Block Request Time (centi-seconds)
Metric value=13.4210526315789
Key Value=SYSTEM
Rule Name=DEFAULT_RULESET_FOR_ALL_TARGETS,METRIC_ALERT_INCIDENT_CREATION
Rule Owner=
Update Details:
Metrics "Global Cache Average CR Get Time" is at 13.421
Incident created by rule (Name = Incident management Ruleset for all targets, Incident creation Rule for metric alerts.; Owner = ).

Maclean Liu(刘相兵

只是2个 Global Cache 的metric度量， 这个问题本身就在哪里， 只不过EM告诉你这一点。

如果觉得DB有性能问题那么值得去看一下AWR和其他performance trend。