Oracle 12C中pga_aggregate_limit參數的修改

應用某個批量無法正常進行，通過報錯排查是由於在12c中參數pga_aggregate_limit參數的限制導致，此參數限制為硬性限制。此參數的修改非常簡單，修改之后立即生效，需要注意的是此處CDB、PDB的pga_aggregate_limit參數都做了限制，調整的時候都做了調整。

[dayu1:oracle]:/oracle/app/oracle/diag/rdbms/cluacdb/CLUACDB1/trace>sqlplus / as sysdba

SQL*Plus: Release 12.2.0.1.0 Production on Sun Oct 21 01:09:40 2018

Copyright (c) 1982, 2017, Oracle.  All rights reserved.


Connected to:
Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production


CDB$ROOT@CLUACDB> show parameter pga

NAME                                 TYPE                   VALUE
------------------------------------ ---------------------- ------------------------------
pga_aggregate_limit                  big integer            9288M
pga_aggregate_target                 big integer            2G
CDB$ROOT@CLUACDB> show parameter container

NAME                                 TYPE                   VALUE
------------------------------------ ---------------------- ------------------------------
containers_parallel_degree           integer                65535
CDB$ROOT@CLUACDB> show pdbs;

    CON_ID CON_NAME                       OPEN MODE  RESTRICTED
---------- ------------------------------ ---------- ----------
         2 PDB$SEED                       READ ONLY  NO
         3 BMMSPDB                        READ WRITE NO
CDB$ROOT@CLUACDB> alter session set container=BMMSPDB;

Session altered.

CDB$ROOT@CLUACDB> show parameter pga;

NAME                                 TYPE                   VALUE
------------------------------------ ---------------------- ------------------------------
pga_aggregate_limit                  big integer            2G
pga_aggregate_target                 big integer            1G





CDB$ROOT@CLUACDB> select ISSYS_MODIFIABLE from v$parameter where name='pga_aggregate_limit'; 

ISSYS_MODIFIABLE
------------------
IMMEDIATE

CDB$ROOT@CLUACDB> select ISSYS_MODIFIABLE from v$parameter where name='pga_aggregate_target';

ISSYS_MODIFIABLE
------------------
IMMEDIATE


alter session set container=BMMSPDB;


alter system set pga_aggregate_limit=0 scope=both;


alter system set pga_aggregate_limit=5000M  scope=both;