[Q] DELL2650 frequently hang while doing file backup

[Tom Callahan]

First off, what version of Oracle is this. If 9i or 10g, you should be
using RMAN as your backup. CP is not a valid, or supported, backup
strategy, especially if the DB is still running while you are copying.

The reason you are seeing heavy CPU is that you are I/O bound from the
SAN to your disks. You are hitting wait time, which brings both your
load avg, and your cpu usage up.

Thanks,

Tom Callahan
TESSCO Technologies
(443)-506-6216
callahant at tessco.com

A real engineer only resorts to documentation when the keyboard dents on the forehead get too noticeable.



mcclnx mcc wrote:

>we have DELL 2650 server (2 X 3.0 Ghz, 12 GB RAM) with
>Redhat AS 3 update 4 installed on it (32 bits).  This server is
>dedicate for ORACLE databases.  Recently this server
>frequently hang whild doing ORACLE nightly backup. 
>ORACLE nightly backup is "CP" command copy files from
>DELL/EMC SAN to DELL 2650 server local disks(PERC
>3/di).  
>
>I alos found while doing "CP" the CPU load between 7
>to 14 (NO other application running).  I wonder why
>simple "cp" command will cause this high CPU load.
>
>Please help.
>
>
>Thanks
>
>
>
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