ORA-00821: Specified value of sga_target 980M is too small, needs to be at least 1164M

SQL> startup
ORA-00821: Specified value of sga_target 980M is too small, needs to be at least 1164M
ORA-01078: failure in processing system parameters

这才发现前面设置的sga_target值980M太小

SQL> alter system set sga_target=980M scope=spfile;

创建pfile到指定位置

SQL> create pfile='/tmp/init20191126.ora' from spfile;File created.Elapsed: 00:00:00.00

对比下

[oracle@orcl u01]$ cat /tmp/init20191126.ora |grep sga_target
orcl.__sga_target=2365587456
*.sga_target=1027604480
[oracle@orcl u01]$ cat /u01/app/oracle/admin/orcl/pfile/init.ora.10232019194515|grep sga_target
sga_target=2254m

最后还是使用

SQL> create spfile from pfile='/u01/app/oracle/admin/orcl/pfile/init.ora.10232019194515';File created.Elapsed: 00:00:00.06

startup失败，startup force一下

SQL> startup
ORA-00093: _shared_pool_reserved_min_alloc must be between 4000 and 0
ORA-01078: failure in processing system parametersSQL> startup force
ORACLE instance started.Total System Global Area 2365587456 bytes
Fixed Size                  8795472 bytes
Variable Size             805309104 bytes
Database Buffers         1543503872 bytes
Redo Buffers                7979008 bytes
Database mounted.
Database opened.
SQL> show parameter pgaNAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
pga_aggregate_limit                  big integer 2G
pga_aggregate_target                 big integer 752M
SQL> show parameter sgaNAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
allow_group_access_to_sga            boolean     FALSE
lock_sga                             boolean     FALSE
pre_page_sga                         boolean     TRUE
sga_max_size                         big integer 2256M
sga_min_size                         big integer 0
sga_target                           big integer 2256M
unified_audit_sga_queue_size         integer     1048576

关闭开启数据库没有问题了。

SQL> startup
ORACLE instance started.Total System Global Area 2365587456 bytes
Fixed Size                  8795472 bytes
Variable Size             805309104 bytes
Database Buffers         1543503872 bytes
Redo Buffers                7979008 bytes
Database mounted.
Database opened.
SQL> alter system set pga_aggregate_target=20M SCOPE=SPFILE;System altered.Elapsed: 00:00:00.02
SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> show parameter pga
ORA-01034: ORACLE not available
Process ID: 0
Session ID: 0 Serial number: 0SQL> startup
ORACLE instance started.Total System Global Area 2365587456 bytes
Fixed Size                  8795472 bytes
Variable Size             805309104 bytes
Database Buffers         1543503872 bytes
Redo Buffers                7979008 bytes
Database mounted.
Database opened.
SQL> alter system set sga_target=980M scope=spfile;System altered.Elapsed: 00:00:00.01
SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup
ORACLE instance started.Total System Global Area 1027604480 bytes
Fixed Size                  8800472 bytes
Variable Size             591398696 bytes
Database Buffers          419430400 bytes
Redo Buffers                7974912 bytes
Database mounted.
Database opened.
SQL> show sga;Total System Global Area 1027604480 bytes
Fixed Size                  8800472 bytes
Variable Size             369100584 bytes
Database Buffers          641728512 bytes
Redo Buffers                7974912 bytes
SQL> show parameter sgaNAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
allow_group_access_to_sga            boolean     FALSE
lock_sga                             boolean     FALSE
pre_page_sga                         boolean     TRUE
sga_max_size                         big integer 980M
sga_min_size                         big integer 0
sga_target                           big integer 980M
unified_audit_sga_queue_size         integer     1048576
SQL> create pfile='/tmp/init20191126a.ora' from spfile;File created.Elapsed: 00:00:00.01
SQL> show parameter pga;NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
pga_aggregate_limit                  big integer 2G
pga_aggregate_target                 big integer 20M
SQL>

再次修改pga和sga没有问题。

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ORA-00821: Specified value of sga_target 980M is too small, needs to be at least 1164M

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