Poorly Performing Materialized-View Refresh With Index Compression High (Doc ID 2677070.1)

Last updated on JANUARY 19, 2022

Applies to:

Oracle Database - Enterprise Edition - Version 19.5.0.0.0 and later
Information in this document applies to any platform.

Symptoms

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After introducing compression and encryption (for HIPAA compliance), a complete materialized-view refresh of million rows is running for at least nineteen hours and not completing.

The DDL in question is:

INSERT /*+ BYPASS_RECURSIVE_CHECK */
INTO <<<>>
.
.
.
SELECT ...
FROM  <<<>>>

SQL ID: 4pg5cdvctcd53

Was invoked by SQL_ID cks88p3q530h8:

  BEGIN

  DBMS_SNAPSHOT.REFRESH(
  LIST => '<<<>>>'
  ,METHOD => 'C'
  ,PUSH_DEFERRED_RPC => TRUE
  ,REFRESH_AFTER_ERRORS => FALSE
  ,PURGE_OPTION => 1
  ,PARALLELISM => 0
  ,ATOMIC_REFRESH => TRUE
  ,NESTED => FALSE
  ,OUT_OF_PLACE => FALSE
  ,SKIP_EXT_DATA => FALSE);

  END;