OEM does a lot of stuff, including recording information in tables, for historical purposes. I've seen these "idle" systems use lots of CPU. Especially, when they do their cleanup and automatic tuning.
If you want to see the difference, go input putty with userid Oracle (or any authorized user for Oracle) and... emctl stop dbconsole this will shutdown EOM Monitor the guest with your favorite performance product. emctl start dbconsole will start up OEM again. On lightly used systems, OEM is the major user of system resources. If this is a real concern in your shop, perhaps shutting it down on test systems or when testing isn't being done, may be right for you. A lot of OEM code is JAVA..... Tom Duerbusch THD Consulting (running with 4 Oracle 10g R2 images) >>> "Kern, Thomas" <[email protected]> 6/17/2009 12:25 PM >>> Our DBA has just installed the Oracle Enterprise Manager 10.2.0.5 on a test server (SLES9 SP3) on our z/VM 5.3 machine (z890 IFL). This morning I noticed that from midnight to 11:00 that test server used about 6 times the CPU seconds as an idle production server. PerfTK shows that SVM using about 3.5% over an hour interval while idle Oracle SVMs use less than 1% CPU. OEM reports that the agent in the server uses at most 1.5% CPU. It does cause the database to perform other performance analysis tasks. Is it reasonable for a Management agent to use 1.5% (or more) of the system CPU in each server? Has anyone in the VM/Linux community validated/invalidated the CPU utilization reports from this product? -- Thomas Kern 301-903-2211 (Office) 301-905-6427 (Mobile) ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
