ORACLE体系结构

体系结构

 

SGA:

$ sqlplus / as sysdba

SQL> show sga

SQL> show parameter sga_max_size  显示sga容量

SQL> select * from V$SGAINFO; 

oem：浏览器中 服务器-->内存指导（https://192.168.0.1:1158/em）

 

shared pool:

SQL> show parameter shared_pool_size 参数

SQL> select component, current_size from V$SGA_DYNAMIC_COMPONENTS where component='shared pool';共享池详细信息

SQL> select * from v$SGAINFO;

 

db buffer cache:

SQL> show parameter db_block_size

SQL> show parameter db_cache_size

SQL> select * from v$SGAINFO;

SQL> select component, current_size from V$SGA_DYNAMIC_COMPONENTS where component='DEFAULT buffer cache'; 动态性能视图

 

redo log buffer:

SQL> show parameter log_buffer

SQL> select * from v$sgainfo;

 

PGA:

SQL> show parameter pga_aggregate_target

SQL> select * from V$PGASTAT where NAME='total PGA allocated';

 

后台进程：

SQL> select name from v$bgprocess where paddr<>'00';

SQL> ! ps -ef | grep ora_

SQL> show parameter db_writer_processes

 

数据文件：

$ ll /u01/app/oracle/oradata/orcl/*.dbf

SQL> select name from v$datafile;

SQL> select name from v$tempfile;

 

控制文件：

$ find /u01 -name 'control0[12].ctl'

SQL> select name from v$controlfile;

SQL> select TYPE, RECORD_SIZE, RECORDS_TOTAL, RECORDS_USED from v$controlfile_record_section;

 

重做日志：

$ ll /u01/app/oracle/oradata/orcl/*.log

SQL> select group#, member from v$logfile;

 

实例参数文件：

$ ll $ORACLE_HOME/dbs/spfile*.ora

$ strings $ORACLE_HOME/dbs/spfileorcl.ora  字符查看

SQL> show parameter spfile;

SQL> show parameter

 

密码文件：

$ ll $ORACLE_HOME/dbs/orapw*

 

归档日志：

SQL> select name from v$archived_log;

 

警告日志：

$ find /u01 -name 'alert_*.log'