Impdp Parallel Index Creation always creates indexes with degree 1. (文档 ID 1289032.1)

APPLIES TO:

Oracle Database - Enterprise Edition - Version 11.2.0.2 to 11.2.0.4 [Release 11.2]
Information in this document applies to any platform.
***Checked for relevance on 23-Nov-2016***

GOAL

Indexes seem always created with parallel degree 1 during import as seen from a sqlfile.

The sql file shows content like:

CREATE INDEX "AP"."AP_INVOICE_DISTRIBUTIONS_N2" ON

"AP"."AP_INVOICE_DISTRIBUTION

S_ALL" ("POSTED_FLAG")

PCTFREE 10 INITRANS 2 MAXTRANS 255 NOLOGGING

STORAGE(INITIAL 262144 NEXT 262144 MINEXTENTS 1 MAXEXTENTS 2147483645

PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT FLASH_CACHE

DE

FAULT CELL_FLASH_CACHE DEFAULT)

TABLESPACE "APPS_TS_TX_IDX"

PARALLEL 1 ;

ALTER INDEX "AP"."AP_INVOICE_DISTRIBUTIONS_N2" PARALLEL 24;

The database is version 11.2.0.2 or above where Bug 8604502 has been fixed.

SOLUTION

The issue is discussed in
Bug 10408313 - INDEXES ARE CREATED WITH PARALLEL DEGREE 1 DURING IMPORT 

closed with status 'Not a Bug'.

The import job with SQLFILE parameter option cannot use multiple execution streams. 

It always executed with parallel 1. Hence its showing the PARALLEL 1 in generated sqlfile and this is an expected behavior.

When you run the import with parallel value and without sqlfile option, then you can see the actual index creation statement with correct parallel value in dw(worker) traces

REFERENCES

BUG:8604502 - INDEXES ARE
ALWAYS CREATED WITH PARALLEL DEGREE 1 DURING IMPORT

BUG:10408313 - INDEXES
ARE CREATED WITH PARALLEL DEGREE 1 DURING IMPORT
BUG:9710511 - DEGREE OF
PARALLELISM IS NOT USED FOR CREATING INDEXES DURING IMPDP OF APPS DB