AW: Enterprise Manager Performance Pages Sampling interval

From: Zwettler Markus (OIZ) <"Zwettler>
Date: Wed, 4 Dec 2019 08:21:16 +0000
Message-ID: <>


So, the "Average Active Sessions" page comes from v$active_session_history?

At which vertex interval is the graph build on? I don't think that they use every 1 second sample as an vertex.


Von: kyle Hailey <>
Gesendet: Dienstag, 3. Dezember 2019 20:02 An: Zwettler Markus (OIZ) <> Cc:
Betreff: Re: Enterprise Manager Performance Pages Sampling interval

The performance page wait values comes from v$system_event and not ASH samples. The top activity page comes from v$active_session_history so it's based on the 1 second samples.


On Tue, Dec 3, 2019 at 8:35 AM Zwettler Markus (OIZ) <<>> wrote: Does anyone know at what interval the average active sessions are sampled which are displayed on the EM Performance Pages?

Active Sessions are sampled every 1 second and put into v$active_session_history

One of 10 samples goes to dba_hist_active_sess_history

The sampling interval on the EM Performance Pages is ???

Received on Wed Dec 04 2019 - 09:21:16 CET

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