增加Oracle内存示例：
环境：集群环境Oracle 11.2.0.0.4
脚本示例如下
操作系统修改shm 为3072M ，sqlplus中备份spfile生成pfile，修改pfile中mem参数，使用pfile启动，创建spfile，完毕。
[root@rac2 ~]# df -h | grep shm tmpfs 1.9G 459M 1.5G 25% /dev/shm [root@rac2 ~]# grep /etc/fstab ^C [root@rac2 ~]# grep shm /etc/fstab [root@rac2 ~]# vi /etc/fstab [root@rac2 ~]# grep shm /etc/fstab tmpfs /dev/shm tmpfs defaults,size=3072m 0 0 [root@rac2 ~]# mount -o remount tmpfs [root@rac2 ~]# df -h | grep shm tmpfs 3.0G 459M 2.6G 15% /dev/shm [root@rac2 ~]#
fstab文件如下
[root@rac2 ~]# cat /etc/fstab # # /etc/fstab # Created by anaconda on Tue Sep 14 23:19:16 2021 # # Accessible filesystems, by reference, are maintained under '/dev/disk' # See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info # /dev/mapper/centos-root / xfs defaults 0 0 UUID=e123d649-cfa2-45f6-b49c-eb994a56c914 /boot xfs defaults 0 0 /dev/mapper/centos-swap swap swap defaults 0 0 tmpfs /dev/shm tmpfs defaults,size=3072m 0 0 [root@rac2 ~]#
sqlplus 中操作如下：
[oracle@rac2 ~]$ sqlplus / as sysdba
SQL*Plus: Release 11.2.0.4.0 Production on Fri Sep 17 00:23:13 2021
Copyright (c) 1982, 2013, Oracle. All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP,
Data Mining and Real Application Testing options
SQL> show parameter sga
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
lock_sga boolean FALSE
pre_page_sga boolean FALSE
sga_max_size big integer 1520M
sga_target big integer 0
SQL> create pfile="001.ora" from spfile;
create pfile="001.ora" from spfile
*
ERROR at line 1:
ORA-02236: invalid file name
SQL> create pfile='001.ora' from spfile;
File created.
SQL> ho vi /u01/app/oracle/product/11.2.0/db_1/dbs/001.ora
SQL> startup force pfile='/u01/app/oracle/product/11.2.0/db_1/dbs/001.ora';
ORACLE instance started.
Total System Global Area 2137886720 bytes
Fixed Size 2254952 bytes
Variable Size 1275070360 bytes
Database Buffers 855638016 bytes
Redo Buffers 4923392 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 2G
sga_target big integer 0
SQL> create spfile from pfile='/u01/app/oracle/product/11.2.0/db_1/dbs/001.ora';
File created.
SQL> startup force
ORACLE instance started.
Total System Global Area 2137886720 bytes
Fixed Size 2254952 bytes
Variable Size 1275070360 bytes
Database Buffers 855638016 bytes
Redo Buffers 4923392 bytes
Database mounted.
Database opened.
SQL>
修改完毕。
001.ora 文件参考
[root@rac2 ~]# cat /u01/app/oracle/product/11.2.0/db_1/dbs/001.ora rac1.__db_cache_size=587202560 rac2.__db_cache_size=587202560 rac1.__java_pool_size=16777216 rac2.__java_pool_size=16777216 rac1.__large_pool_size=33554432 rac2.__large_pool_size=33554432 rac1.__pga_aggregate_target=637534208 rac2.__pga_aggregate_target=637534208 rac1.__sga_target=956301312 rac2.__sga_target=956301312 rac1.__shared_io_pool_size=0 rac2.__shared_io_pool_size=0 rac1.__shared_pool_size=301989888 rac2.__shared_pool_size=301989888 rac1.__streams_pool_size=0 rac2.__streams_pool_size=0 *.audit_file_dest='/u01/app/oracle/admin/rac/adump' *.audit_trail='db' *.cluster_database=true *.compatible='11.2.0.4.0' *.control_files='+DATA/rac/controlfile/current.260.1083455781' *.db_block_size=8192 *.db_create_file_dest='+DATA' *.db_domain='' *.db_name='rac' *.diagnostic_dest='/u01/app/oracle' *.dispatchers='(PROTOCOL=TCP) (SERVICE=racXDB)' rac2.instance_number=2 rac1.instance_number=1 #*.memory_target=1588592640 *.memory_target=2048m *.open_cursors=300 *.processes=150 *.remote_listener='rac-scan:1521' *.remote_login_passwordfile='exclusive' rac2.thread=2 rac1.thread=1 rac1.undo_tablespace='UNDOTBS1' rac2.undo_tablespace='UNDOTBS2' [root@rac2 ~]#