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Slow Materialized View Refresh After Upgrading Materialized View database To 19C (Doc ID 2766301.1)

Last updated on APRIL 17, 2023

Applies to:

Oracle Database - Enterprise Edition - Version 19.8.0.0.0 and later
Information in this document applies to any platform.

Symptoms

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You are having issues while refreshing some materialized views on the database after its upgrade from 11.2.0.4 to 19C. There is one materialized view refresh session which is waiting for "db file sequential read" while executing an insert on the materialized view itself, on the remote site(materialized view log) you see the corresponding session with ACTIVE status waiting for "SQL*Net more data to client".

The refresh process is taking too much time and enabling trace 10046 level12 on the session refreshing the mview you see lots of messages like these:

Changes

The materialized view site upgraded from 11204 to 19C

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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