修改步骤

[oracle@ywqdb ~]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.4.0 Production on Mon Apr 18 11:23:44 2016

Connected to an idle instance.

SQL> show parameter memory

NAME TYPE VALUE

------------------------------------ ----------- ------------------------------

hi_shared_memory_address integer 0

memory_max_target big integer 0

memory_target big integer 0

shared_memory_address integer 0

SQL> show parameter sga

NAME TYPE VALUE

------------------------------------ ----------- ------------------------------

lock_sga boolean FALSE

pre_page_sga boolean FALSE

sga_max_size big integer 4G

sga_target big integer 4G

SQL> show parameter pga

NAME TYPE VALUE

------------------------------------ ----------- ------------------------------

pga_aggregate_target big integer 2283M

SQL> alter system set memory_max_target=11G scope=spfile;

System altered.

SQL> alter system set memory_target=11G scope=spfile;

System altered.

SQL> show parameter sga

NAME TYPE VALUE

------------------------------------ ----------- ------------------------------

lock_sga boolean FALSE

pre_page_sga boolean FALSE

sga_max_size big integer 4G

sga_target big integer 4G

SQL> shutdown immediate

Database closed.

Database dismounted.

ORACLE instance shut down.

SQL> startup

ORA-00845: MEMORY_TARGET not supported on this system

SQL> startup

ORACLE instance started.

Total System Global Area 1.2827E+10 bytes

Fixed Size 2265224 bytes

Variable Size 9797898104 bytes

Database Buffers 3019898880 bytes

Redo Buffers 7307264 bytes

Database mounted.

Database opened.

SQL> show parameter sga

NAME TYPE VALUE

------------------------------------ ----------- ------------------------------

lock_sga boolean FALSE

pre_page_sga boolean FALSE

sga_max_size big integer 11G

sga_target

SQL> alter system set sga_max_size=8G scope=spfile;

System altered.

SQL> alter system set sga_target=8G scope=spfile;

System altered.

SQL> show parameter pga

NAME TYPE VALUE

------------------------------------ ----------- ------------------------------

pga_aggregate_target big integer 2283M

SQL> alter system set pga_aggregate_target=3G scope=spfile;

System altered.

SQL> shutdown immediate

Database closed.

Database dismounted.

ORACLE instance shut down.

SQL> startup

ORACLE instance started.

Total System Global Area 8551575552 bytes

Fixed Size 2270360 bytes

Variable Size 1191185256 bytes

Database Buffers 7348420608 bytes

Redo Buffers 9699328 bytes

Database mounted.

Database opened.

SQL> show parameter sga

NAME TYPE VALUE

------------------------------------ ----------- ------------------------------

lock_sga boolean FALSE

pre_page_sga boolean FALSE

sga_max_size big integer 8G

sga_target big integer 8G

SQL> show parameter pga

NAME TYPE VALUE

------------------------------------ ----------- ------------------------------

pga_aggregate_target big integer 3G

异常处理

ORA-00845: MEMORY_TARGET not supported on this system

[root@ywqdb ~]# df -h

Filesystem Size Used Avail Use% Mounted on

/dev/vda2 50G 15G 33G 31% /

tmpfs 7.8G 224K 7.8G 1% /dev/shm

/dev/vda1 194M 34M 151M 19% /boot

/dev/vdb1 197G 5.1G 182G 3% /oradata

[root@ywqdb ~]# umount /dev/shm

umount: /dev/shm: device is busy.

(In some cases useful info about processes that use

the device is found by lsof(8) or fuser(1))

[root@ywqdb ~]# fuser -m -v /dev/shm

USER PID ACCESS COMMAND

/dev/shm: root 2141 ....m gnome-settings-

root 2162 ....m metacity

root 2210 ....m gnome-volume-co

root 2226 ....m pulseaudio

[root@ywqdb ~]# kill -9 2141

[root@ywqdb ~]# kill -9 2162

[root@ywqdb ~]# kill -9 2210

[root@ywqdb ~]# kill -9 2226

[root@ywqdb ~]# umount /dev/shm

[root@ywqdb ~]# mount -t tmpfs shmfs -o size=12g /dev/shm

You have mail in /var/spool/mail/root

[root@ywqdb ~]# vi /etc/fstab

tmpfs /dev/shm tmpfs defaults ,size=12G 0 0

[root@ywqdb ~]# df -h

Filesystem Size Used Avail Use% Mounted on

/dev/vda2 50G 15G 33G 31% /

/dev/vda1 194M 34M 151M 19% /boot

/dev/vdb1 197G 5.1G 182G 3% /oradata

shmfs 12G 0 12G 0% /dev/shm

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Oracle11g修改SGA和PGA ORA-00845

修改步骤

异常处理

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