Oracle DBA 必须掌握的 查询脚本:
1:通过v$parameter数据字段来查询oracle标准数据块的大小
1 ----通过 v$parameter数据字典来查询oracle标准数据块的大小。 2 [email protected]> startup 3 ORACLE instance started. 4 5 Total System Global Area 1221992448 bytes 6 Fixed Size 1344596 bytes 7 Variable Size 771754924 bytes 8 Database Buffers 436207616 bytes 9 Redo Buffers 12685312 bytes 10 Database mounted. 11 Database opened. 12 [email protected]> col name format a30; 13 [email protected]> col value format a20; 14 [email protected]> select name,value from v$parameter where name=‘db_block_size‘; 15 16 NAME VALUE 17 ------------------------------ -------------------- 18 db_block_size 8192 19 20 [email protected]> show parameter db_block 21 22 NAME TYPE VALUE 23 ------------------------------------ ----------- ------------------------------ 24 db_block_buffers integer 0 25 db_block_checking string FALSE 26 db_block_checksum string TYPICAL 27 db_block_size integer 8192
2:通过 dict 查看数据库中数据字典的信息
1 [email protected]> col table_name for a30; 2 [email protected]> col comments for a30; 3 [email protected]> select * from dict; 4 5 TABLE_NAME COMMENTS 6 ------------------------------ ------------------------------ 7 DBA_CONS_COLUMNS Information about accessible c 8 olumns in constraint definitio 9 ns 10 11 DBA_LOG_GROUP_COLUMNS Information about columns in l 12 og group definitions 13 14 DBA_LOBS Description of LOBs contained 15 in all tables 16 17 DBA_CATALOG All database Tables, Views, Sy
3 : 通过 v$fixed_view_definition 查看数据库中内部系统表的信息
1 [email protected]> col view_name format a15; 2 [email protected]> col view_definition format a30000; 3 [email protected]> select * from v$fixed_view_definition where rownum<=10; 4 5 VIEW_NAME VIEW_DEFINITION 6 ---------------------------------------------------------------------------------------------- 7 GV$WAITSTAT select inst_id,decode(indx,1,‘data block‘,2,‘sort block‘,3,‘save undo block‘, 4, 8 ‘segment header‘,5,‘save undo header‘,6,‘free list‘,7,‘extent map‘, 8,‘1st level 9 bmb‘,9,‘2nd level bmb‘,10,‘3rd level bmb‘, 11,‘bitmap block‘,12,‘bitmap index b 10 lock‘,13,‘file header block‘,14,‘unused‘, 15,‘system undo header‘,16,‘system und 11 o block‘, 17,‘undo header‘,18,‘undo block‘), count,time from x$kcbwait where ind 12 x!=0
4:通过查询 dba_data_files 数据来了解Oracle系统的数据文件信息
1 [[email protected] ~]$ sqlplus / as sysdba; 2 3 SQL*Plus: Release 11.2.0.3.0 Production on Thu Dec 8 23:27:12 2016 4 5 Copyright (c) 1982, 2011, Oracle. All rights reserved. 6 7 8 Connected to: 9 Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - Production 10 With the Partitioning, OLAP, Data Mining and Real Application Testing options 11 12 [email protected]> col file_name format a50; 13 [email protected]> set linesize3000; 14 [email protected]> select file_name,tablespace_name from dba_data_files where rownum<=10; 15 16 FILE_NAME TABLESPACE_NAME 17 -------------------------------------------------- ------------------------------ 18 /u01/app/oracle/oradata/orcl/users01.dbf USERS 19 /u01/app/oracle/oradata/orcl/undotbs01.dbf UNDOTBS1 20 /u01/app/oracle/oradata/orcl/sysaux01.dbf SYSAUX 21 /u01/app/oracle/oradata/orcl/system01.dbf SYSTEM 22 /u01/app/oracle/oradata/orcl/example01.dbf EXAMPLE 23 24 [email protected]>
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