实用的数据库检查程序 (1)

答案：
 

功能:

1.     数据库的基本信息显示(建库时间,模式等)

2.     数据库结构信息-DATABASE MAP(CONTROL FILE, REDO LOG FILE, DATAFILE, ROLLBACK SEGMENT)

3.     数据库所有状态信息

4.     数据库级的DB Block Buffer Hit Ratio

5.     SESSION级的DB Block Buffer Hit Ratio

6.     前一天的LOG SWITCH情况

7.     REDO LOG 空间需求查询

8.     LOG Buffer 性能查询

9.     log file switch性能查询

10.  检查不完全的CHECKPOINT

11.  Library Cache 的　性能查询

12.  Dictionary Cache的　性能查询

13.  查找最资源的SQL语句

14.  SESSION级的CPU使用度

15.  SORT_AREA_SIZE的性能查询

16.  SEQUENCE_CACHE_ENTRIES的性能查询

17.  CHAINED ROW的查询

18.  Rollback Segment Contention 检查

19.  表空间碎片检查

20.  ＬATCH contention 检查

21.  TABLESPACE 用量检查

22.  数据文件Ｉ／Ｏ检查

23.  表和索引的碎片检查

24.  表的ＨＷＭ检查

 

使用方法举例:

 

目前，作为一个DBA，可以有很多工具来管理，维护和症查数据库．这只是我平时搜集的一些脚本，可以作为DBA随身携带的小工具程序

在没有其他可视化的工具时，它可以用来对数据库做一些基本的诊断．

 

１．打开SQLPLUS , Connect System

２．@a:\check_db.sql   (a:\是本文件的路径)

３．执行完毕，结果储存在C:\LOCAL.TXT

４．LOCAL.TXT 不但有每个数据的说明，同时介绍一些解决相关问题的方法以供参考

 

Check_db.sql的内容：

 

SET echo off

spool c:\local.txt

ttitle off

break on today

column today noprint new_value xdate

select substr(to_char(sysdate,'fmMonth DD, YYYY HH:MI:SS P.M.'),1,35) today

from dual

/

column name noprint new_value xdbname

select name from v$database

/

 

set heading on

set feedback off

set linesize  250

set pagesize 200

 

rem ######################################################################################

rem             **** CHECK_DB_V2.1: Performance Tuning****

rem ######################################################################################

 

prompt *******************************************************************************

prompt          Database Check Information

prompt *******************************************************************************

ttitle left "DATABASE: "xdbname" (AS OF: "xdate")" skip 2

select name , created , log_mode from v$database

/

prompt

prompt *******************************************************************************

ttitle off

 

prompt

prompt ++++++++++++++++++++++++++++++++++ Item ++++++++++++++++++++++++++++++++++

prompt + 0.0 database map                                                       +

prompt ++++++++++++++++++++++++++++++++++ Item ++++++++++++++++++++++++++++++++++

prompt

 

ttitle left "*** DataBase Map - Control File ***" 

column "CONTROL FILE" format A40

select status , name "CONTROL FILE" from v$controlfile

/

ttitle off

ttitle left "*** DataBase Map - RedoLog File ***" 

column "Log File" format A40

select f.member "Log File",l.group# ,l.thread# ,l.bytes ,l.status from v$log l, v$logfile f

where l.group# = f.group# 

/

 ttitle off

ttitle left "*** DataBase Map - Data File ***" 

column file_name format A40                        

                                                                                             

select file_name ,tablespace_name,bytes,blocks,status from dba_data_files order by tablespace_name , bytes desc                                                                                                                         

/

ttitle off

ttitle left "*** DataBase Map - RollBack Seg ***" 

 

SELECT N.NAME "ROLLBACK SEG NAME" , R.EXTENTS , r.rssize , R.OPTSIZE , HWMSIZE ,STATUS 

FROM V$ROLLSTAT R,V$rollNAME N

WHERE  R.USN = N.USN

/

 

ttitle off

 

prompt ++++++++++++++++++++++++++++++++++ Item ++++++++++++++++++++++++++++++++++

prompt + 1.0 database statistic                                                 +

prompt ++++++++++++++++++++++++++++++++++ Item ++++++++++++++++++++++++++++++++++

set heading on

set termout on

 

TTitle left "*** Database: "xdbname", Database Statistic(As of : "xdate" ) ***" skip 1

 

column "Statistic Name" format A55

column value format 9,999,999,999,999,990

 

select n.statistic# , n.name "Statistic Name", s.value

from v$statname n , v$sysstat s

where n.statistic# = s.statistic#

and value > 0

order by value desc

/

ttitle off

 

prompt ++++++++++++++++++++++++++++++++++ Item ++++++++++++++++++++++++++++++++++

prompt + 2.0 DB Block Buffer - Hit Ratio (Database Wise)                        +

prompt ++++++++++++++++++++++++++++++++++ Item ++++++++++++++++++++++++++++++++++

set heading on

set termout on

 

column "Physical Reads" format 9,999,999,999,999

column "Consistent Gets" format 9,999,999,999,999

column "DB Block Gets" format 9,999,999,999,999

column "Hit Ratio" format 999.99

 

TTitle left "*** Database: "xdbname", DB Block Buffers Hit Ratio (As of : "xdate" ) ***" skip 1-

left  "Percent = ((100*(1-(Physical Reads/(Consistent Gets + DB Block Gets))))"  skip 2

 

select pr.

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