What is normal SCSI error handling process (scsi_eh_3) CPU time usage?

Posted by Kris Jordan on Server Fault See other posts from Server Fault or by Kris Jordan
Published on 2010-05-21T19:37:22Z Indexed on 2010/05/21 19:41 UTC
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Last week I got setup with a new dedicated server that is running 4x SCSI drives in RAID 10 on CentOS. The machine is pretty lightly loaded at the moment and has been running for 8 days.

The process 'scsi_eh_3' has a CPU time of 13:09.67 in top. This is 3x the next closest CPU time of 4:03.93 for mysqld. Is it normal for the scsi error handling process to use this much CPU time? (Seems like it goes to 0.3% usage ever 5 seconds.) Could this be an indicator that one or more of the drives is having issues?

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