oracle impdp - 超过最大打开游标

Question

我从 oracle 10.2.0.5.0 数据库中导出了一个数据库架构，使用 expdp，以架构所有者身份登录。

现在我尝试在 Oracle 12.1.0.2.0 数据库 impdp 上导入数据，以 sys 身份登录，角色为 sysdba。

expdp 命令：

expdp "owner/password@hostname/servicename" schemas=SCHEMA_NAME directory=EXPDIR dumpfile=SCHEMA_NAME.dmp logfile=SCHEMA_NAME.log 

impdp 命令：

impdp "sys/password@hostname/servicename as sysdba" schemas=SCHEMA_NAME directory=EXPDIR dumpfile=SCHEMA_NAME.dmp logfile=SCHEMA_NAME.log 

导入给了我错误信息：

Processing object type SCHEMA_EXPORT/TABLE/GRANT/OWNER_GRANT/OBJECT_GRANT
Processing object type SCHEMA_EXPORT/TABLE/INDEX/INDEX
ORA-39014: One or more workers have prematurely exited.
ORA-39029: worker 1 with process name "DW00" prematurely terminated
ORA-31671: Worker process DW00 had an unhandled exception.
ORA-01000: maximum open cursors exceeded
ORA-39126: Worker unexpected fatal error in KUPW$WORKER.PUT_DDLS [INDEX:"SCHEMA_NAME"."UK$SOME$NAME"] 
CREATE UNIQUE INDEX "SCHEMA_NAME"."UK$SOME$NAME" ON "SCHEMA_NAME"."TABLE_NAME" ("COLUMN_NAME") PCTFREE 10 INITRANS 2 MAXTRANS 255  STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT FLASH_CACHE DEFAULT CELL_FLASH_CACHE DEFAULT) TABLESPACE "TBLSPC" PARALLEL 1 
ORA-31625: Schema SYS is needed to import this object, but is unaccessible
ORA-00604: error occurred at recursive SQL level 2
ORA-01000: maximum open cursors exceeded
ORA-06512: at "SYS.KUPW$WORKER", line 9193
ORA-06512: at "SYS.KUPW$WORKER", line 22449
ORA-31625: Schema SYS is needed to import this object, but is unaccessible
ORA-00604: error occurred at recursive SQL level 2
ORA-01000: maximum open cursors exceeded
ORA-01000: maximum open cursors exceeded
ORA-39014: One or more workers have prematurely exited.
ORA-39029: worker 2 with process name "DW00" prematurely terminated
ORA-31671: Worker process DW00 had an unhandled exception.
ORA-01000: maximum open cursors exceeded
ORA-39126: Worker unexpected fatal error in KUPW$WORKER.PUT_DDLS [INDEX:"SCHEMA_NAME"."IDX$SOME$OTHER_NAME"] 
CREATE INDEX "SCHEMA_NAME"."IDX$SOME$OTHER_NAME" ON "SCHEMA_NAME"."OTHER_TABLE_NAME" ("OTHER_COLUMN_NAME") PCTFREE 10 INITRANS 2 MAXTRANS 255  STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT FLASH_CACHE DEFAULT CELL_FLASH_CACHE DEFAULT) TABLESPACE "TBLSPC" PARALLEL 1 
ORA-31625: Schema SYS is needed to import this object, but is unaccessible
ORA-00604: error occurred at recursive SQL level 2
ORA-01000: maximum open cursors exceeded
ORA-06512: at "SYS.KUPW$WORKER", line 9193
ORA-06512: at "SYS.KUPW$WORKER", line 22449
ORA-31625: Schema SYS is needed to import this object, but is unaccessible
ORA-00604: error occurred at recursive SQL level 2
ORA-01000: maximum open cursors exceeded
ORA-01000: maximum open cursors exceeded
Job "SYS"."SYS_IMPORT_SCHEMA_13" stopped due to fatal error at Fri Dec 1 14:09:07 2017 elapsed 0 00:02:05

我尝试增加打开游标的最大数量，但没有帮助。

使用 EXCLUDE=INDEX 选项，导入运行不会出错，但我也需要它们。

接下来我可以尝试什么？

Answer 1

ORA-01000: Maximum Open Cursors Exceeded During DataPump Import (IMPDP) In 12c (Doc ID 2283800.1) Last updated on AUGUST 08, 2017

Invoking Data Pump Import

不要调用 Import as SYSDBA，除非 Oracle 要求 技术支援。 SYSDBA 是内部使用的，有专门的 职能;它的行为与普通用户不同。

Answer 2

ORA-01000：在 12c 中执行 DataPump 作业期间超过最大打开游标（文档 ID 2283800.1）

原因

OPEN_CURSOR 的值设置得不够高。

在进行DataPump导入时，游标的数量取决于各种因素，包括对象数量、分区、索引、涉及的递归SQL等。另外，在12c上，impdp的内部处理比10g复杂，所以它可能需要更高的 open_cursor 才能完成导入工作。

解决方案

暂时将 OPEN_CURSORS 增加到一个足够高的值，例如 2000 并重新执行 DataPump 作业。