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13c agent high I/O

edited Dec 15, 2017 4:00AM in Enterprise Manager Generic (MOSC) 2 commentsAnswered

Hi,

We have several Oracle EE 11.2.0.4 databases (on Linux) which are monitored by Grid (aka OMS/OEM/CC) 13.2 and we see that the agent causes high I/O utilization. We already did fix the bug as described on Metalink

Doc ID 2201982.1 ( SELECT MEDIA FROM V$BACKUP_PIECE_DETAILS WHERE SESSION_KEY=:B3 AND SESSION_RECID=:B2 AND SESSION_STAMP=:B1 AND DEVICE_TYPE = 'SBT_TAPE' AND ROWNUM = 1

It is taking 5 minutes and using 10+ GB of temp space:

The query executes approximately every 15 minutes.). This made a huge difference in I/O utilization!

But we find  the I/O utization by the agent still high. We check this by stopping the agent and doing a "sar -b" and after some time we start the agent again and do a sar again for some time. There is an increase in I/O when the agent is running. We would like to know if there some other metrics that can cause an high I/O. Is there a way to log all db. hosts metrics the agent is doing?

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