RE: DataGuard Bandwidth requirements

From: Sweetser, Joe <>
Date: Wed, 13 May 2015 14:47:08 +0000
Message-ID: <>

A bit perplexing, these numbers are…..

Doc ID 736755.1 has the formula and says it assumes a 30% overhead for TCP/IP, so I think .7 is 70% utilization. I also think the 1,000,000 is just to get the answer mb’s. But I can’t figure out where the 8 comes from in the formula.


From: [] On Behalf Of max scalf Sent: Wednesday, May 13, 2015 7:29 AM
To: Oracle Mailing List
Subject: DataGuard Bandwidth requirements

Hello list,

we are in process of deploying a Data guard and i am looking to get a bandwidth requirements. While googleing i came across the below formula multiple question is what exactly do the below numbers represents 0.7, 8, 1000000 ?? i know we can get and redo rate bytes per sec from v$sysmetric_history but confused on the numbers...

Required bandwidth = ((Redo rate bytes per sec. / 0.7) * 8) / 1,000,000 = bandwidth in Mbps

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-- Received on Wed May 13 2015 - 16:47:08 CEST

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