ORACLE 常用脚本（4）

rem  这需要 统计某个具体用户的"Table,index,column,constraits"

rem================================================================

rem   全部表-列定义 table_cols.txt

 set lin 110 pages 3000

 column table_name format a30

 column data_type  format a12

 column data_default  format a8

 column column_name format a22

 column Cid format  999

 column Len format  9999

 column Prec format  99

 column Scale format  99

select  TABLE_NAME, COLUMN_ID "Cid", COLUMN_NAME, DATA_TYPE, DATA_LENGTH "Len",

 nvl(DATA_PRECISION,'-1') "Prec", nvl(DATA_SCALE,'-1') "Scale",

 NULLABLE,  DATA_DEFAULT

from   USER_TAB_COLUMNS ;

rem ======== TAB =============

select * from tab;

spool off

spool user_indexes.txt

rem   全部索引定义user_index.txt

 column table_name format a22

 column index_name format a28

 column index_type format a7

 column column_name format a18

 column # format  99

 column Init format  999999;

select  a.table_name, t.cache "C",a.index_name,

 column_position "#",column_name,

 UNIQUENESS,a.INITIAL_EXTENT/1024 "Init"

 from user_indexes a, user_ind_columns c,user_tables t

 where  c.INDEX_NAME =a.INDEX_NAME  

 and a.table_name= t.table_name

 order by  a.table_name,a.index_name,column_position;

spool user_Obj_Table_Index.txt

rem  用户对象，表和索引userObj_Table_Index.txt

 set lin 111 pages 333

 column table_name format a24

 column index_name format a32

 column tablespace_name a12

rem 由于用户要关心的是我自己的详细数据的存放位置，下面分别得出index,tables

 select tablespace_name,table_name,cache,initial_extent/1024 "Init"

    from user_tables  order by tablespace_name,table_name;

 select tablespace_name,table_name,index_name,initial_extent/1024 "Init"

   from user_indexes  order by tablespace_name,table_name,index_name;

spool user_constraints.txt

rem   全部表-列约束_user_constraints.txt

 column CONSTRAINT_NAME format a30

 column TABLE_NAME format a30

 column r_CONSTRAINT_NAME format a20

select CONSTRAINT_NAME,

 CONSTRAINT_TYPE,  TABLE_NAME, R_CONSTRAINT_NAME, DELETE_RULE  

 from user_constraints

 order by  CONSTRAINT_TYPE,TABLE_NAME;

spool c:\user_index1rebld.sql

rem   重建全部索引

rem select 'alter index '||index_name||' rebuild;' from user_indexes

rem    where table_name = 'GWNEWS';

select 'alter index '||INDEX_NAME||' rebuild tablespace indexes;' from user_indexes;

rem @index1rebld.sql

spool c:\user_sources.sql

rem   全部代码，主要是procedure

 column name format a22 ;

 column text format a77;

 break on name;

select text,name from user_source;

rem       =============== End of File ==================

*************查看当前用户使用的操作****************************

SELECT a.machine,a.terminal,a.osuser, a.username, b.sql_text

from v$session a, v$sqlarea b

where a.sql_address =b.address order by b.address

***************************************************

1. 监控事例的等待

select event,sum(decode(wait_Time,0,0,1)) "Prev", 

sum(decode(wait_Time,0,1,0)) "Curr",count(*) "Tot" 

from v$session_Wait 

group by event order by 4;

2. 回滚段的争用情况

select name, waits, gets, waits/gets "Ratio" 

from v$rollstat a, v$rollname b 

where a.usn = b.usn;

3. 监控表空间的 I/O 比例

select df.tablespace_name name,df.file_name "file",f.phyrds pyr, 

f.phyblkrd pbr,f.phywrts pyw, f.phyblkwrt pbw 

from v$filestat f, dba_data_files df 

where f.file# = df.file_id 

order by df.tablespace_name;

4. 监控文件系统的 I/O 比例

select substr(a.file#,1,2) "#", substr(a.name,1,30) "Name", 

a.status, a.bytes, b.phyrds, b.phywrts 

from v$datafile a, v$filestat b 

where a.file# = b.file#;

5.在某个用户下找所有的索引

select user_indexes.table_name, user_indexes.index_name,uniqueness, column_name 

from user_ind_columns, user_indexes 

where user_ind_columns.index_name = user_indexes.index_name 

and user_ind_columns.table_name = user_indexes.table_name 

order by user_indexes.table_type, user_indexes.table_name, 

user_indexes.index_name, column_position;

6. 监控 SGA 的命中率

select a.value + b.value "logical_reads", c.value "phys_reads", 

round(100 * ((a.value+b.value)-c.value) / (a.value+b.value)) "BUFFER HIT RATIO" 

from v$sysstat a, v$sysstat b, v$sysstat c 

where a.statistic# = 38 and b.statistic# = 39 

and c.statistic# = 40;

7. 监控 SGA 中字典缓冲区的命中率

select parameter, gets,Getmisses , getmisses/(gets+getmisses)*100 "miss ratio", 

(1-(sum(getmisses)/ (sum(gets)+sum(getmisses))))*100 "Hit ratio" 

from v$rowcache 

where gets+getmisses <>0 

group by parameter, gets, getmisses;

8. 监控 SGA 中共享缓存区的命中率，应该小于1%

select sum(pins) "Total Pins", sum(reloads) "Total Reloads", 

sum(reloads)/sum(pins) *100 libcache 

from v$librarycache;

select sum(pinhits-reloads)/sum(pins) "hit radio",sum(reloads)/sum(pins) "reload percent" 

9.显示所有数据库对象的类别和大小

select count(name) num_instances ,type ,sum(source_size) source_size , 

sum(parsed_size) parsed_size ,sum(code_size) code_size ,sum(error_size) error_size, 

sum(source_size) +sum(parsed_size) +sum(code_size) +sum(error_size) size_required 

from dba_object_size 

group by type order by 2;

10.监控 SGA 中重做日志缓存区的命中率，应该小于1%

SELECT name, gets, misses, immediate_gets, immediate_misses, 

Decode(gets,0,0,misses/gets*100) ratio1, 

Decode(immediate_gets+immediate_misses,0,0, 

immediate_misses/(immediate_gets+immediate_misses)*100) ratio2 

FROM v$latch WHERE name IN ('redo allocation', 'redo copy');

11.监控内存和硬盘的排序比率，最好使它小于 .10，增加 sort_area_size

SELECT name, value FROM v$sysstat WHERE name IN ('sorts (memory)', 'sorts (disk)');

12.监控当前数据库谁在运行什么SQL语句

SELECT osuser, username, sql_text from v$session a, v$sqltext b 

where a.sql_address =b.address order by address, piece;

13.监控字典缓冲区

SELECT (SUM(PINS - RELOADS)) / SUM(PINS) "LIB CACHE" FROM V$LIBRARYCACHE; 

SELECT (SUM(GETS - GETMISSES - USAGE - FIXED)) / SUM(GETS) "ROW CACHE" FROM V$ROWCACHE; 

SELECT SUM(PINS) "EXECUTIONS", SUM(RELOADS) "CACHE MISSES WHILE EXECUTING" FROM V$LIBRARYCACHE;

后者除以前者,此比率小于1%,接近0%为好。

SELECT SUM(GETS) "DICTIONARY GETS",SUM(GETMISSES) "DICTIONARY CACHE GET MISSES" 

FROM V$ROWCACHE

14.找ORACLE字符集

select * from sys.props$ where name='NLS_CHARACTERSET';

15. 监控 MTS

select busy/(busy+idle) "shared servers busy" from v$dispatcher;

此值大于0.5时，参数需加大

select sum(wait)/sum(totalq) "dispatcher waits" from v$queue where type='dispatcher'; 

select count(*) from v$dispatcher; 

select servers_highwater from v$mts;

servers_highwater接近mts_max_servers时，参数需加大

16. 碎片程度

select tablespace_name,count(tablespace_name) from dba_free_space group by tablespace_name 

having count(tablespace_name)>10;

alter tablespace name coalesce; 

alter table name deallocate unused;

create or replace view ts_blocks_v as 

select tablespace_name,block_id,bytes,blocks,'free space' segment_name from dba_free_space 

union all 

select tablespace_name,block_id,bytes,blocks,segment_name from dba_extents;

select * from ts_blocks_v;

select tablespace_name,sum(bytes),max(bytes),count(block_id) from dba_free_space 

group by tablespace_name;

查看碎片程度高的表

SELECT segment_name table_name , COUNT(*) extents 

FROM dba_segments WHERE owner NOT IN ('SYS', 'SYSTEM') GROUP BY segment_name 

HAVING COUNT(*) = (SELECT MAX( COUNT(*) ) FROM dba_segments GROUP BY segment_name);

17. 表、索引的存储情况检查

select segment_name,sum(bytes),count(*) ext_quan from dba_extents where 

tablespace_name='&tablespace_name' and segment_type='TABLE' group by tablespace_name,segment_name;

select segment_name,count(*) from dba_extents where segment_type='INDEX' and owner='&owner' 

group by segment_name;

18、找使用CPU多的用户session

12是cpu used by this session

select a.sid,spid,status,substr(a.program,1,40) prog,a.terminal,osuser,value/60/100 value 

from v$session a,v$process b,v$sesstat c 

where c.statistic#=12 and c.sid=a.sid and a.paddr=b.addr order by value desc;

19、查看Lock 

SELECT sn.username, m.sid, m.type, 

DECODE(m.lmode, 0, 'None', 

1, 'Null', 

2, 'Row Share', 

3, 'Row Excl.', 

4, 'Share', 

5, 'S/Row Excl.', 

6, 'Exclusive', 

lmode, ltrim(to_char(lmode,'990'))) lmode, 

DECODE(m.request,0, 'None', 

request, ltrim(to_char(m.request, 

'990'))) request, 

m.id1, m.id2 

FROM v$session sn, v$lock m 

WHERE (sn.sid = m.sid AND m.request != 0) 

OR (sn.sid = m.sid 

AND m.request = 0 AND lmode != 4 

AND (id1, id2) IN (SELECT s.id1, s.id2 

FROM v$lock s 

WHERE request != 0 

AND s.id1 = m.id1 

AND s.id2 = m.id2) 

) 

ORDER BY id1, id2, m.request;

select l.sid,s.serial#,s.username,s.terminal, 

decode(l.type,'RW','RW - Row Wait Enqueue', 

'TM','TM - DML Enqueue', 

'TX','TX - Trans Enqueue', 

'UL','UL - User',l.type||'System') res, 

substr(t.name,1,10) tab,u.name owner, 

l.id1,l.id2, 

decode(l.lmode,1,'No Lock', 

2,'Row Share', 

3,'Row Exclusive', 

4,'Share', 

5,'Shr Row Excl', 

6,'Exclusive',null) lmode, 

decode(l.request,1,'No Lock', 

3,'Row Excl', 

6,'Exclusive',null) request 

from v$lock l, v$session s, 

sys.user$ u,sys.obj$ t 

where l.sid = s.sid 

and s.type != 'BACKGROUND' 

and t.obj# = l.id1 

and u.user# = t.owner#

--第二条语句比较有效。

20、显示表空间的使用情况：

col tsname format a16 justify c heading 'Tablespace' 

col nfrags format 999,990 justify c heading 'Free|Frags' 

col mxfrag format 999,999,990 justify c heading 'Largest|Frag (KB)' 

col totsiz format 999,999,990 justify c heading 'Total|(KB)' 

col avasiz format 999,999,990 justify c heading 'Available|(KB)' 

col pctusd format 990 justify c heading 'Pct|Used' 

select 

total.tablespace_name tsname, 

count(free.bytes) nfrags, 

nvl(max(free.bytes)/1024,0) mxfrag, 

total.bytes/1024 totsiz, 

nvl(sum(free.bytes)/1024,0) avasiz, 

(1-nvl(sum(free.bytes),0)/total.bytes)*100 pctusd 

from 

dba_data_files total, 

dba_free_space free 

where 

total.tablespace_name = free.tablespace_name(+) 

group by 

total.tablespace_name, 

total.bytes;

本文转自 tianya23 51CTO博客，原文链接：http://blog.51cto.com/tianya23/250114，如需转载请自行联系原作者