日常工作使用work.txt内容

1.数据库版本

select * from v$instance

2.库物理logic结构

(1).重做日志

select * from v$log;

所在位置：

select * from v$logfile

select a.group#,b.member,a.bytes/1024/1024 as "size(MB)"

from v$log a,v$logfile b

where b.group#=a.group#

order by a.group#

(2).物理文件存放位置

select * from dba_data_files

(3).逻辑表空间查看

select * from dba_tablespaces //bigfile/segment man/type/status

(4)段和表空间关系

select * from dba_extents /partion/

select * from dba_segments

(5)查看临时表空间

select * from dba_temp_files

select * from v$tempfile

(6)undo表空间

select * from dba_undo_extents

3.查看用户默认平空间和临时平空间

select * from dba_users

4.数据库每月增长量

select to_char(creation_time,'RRRR MONTH')"MONTH",

SUM(BYTES)/1024/1024/1024 "GROWTH SIZE"

FROM SYS.V_$DATAFILE

WHERE CREATION_TIME>SYSDATE-365

GROUP BY to_char(creation_time,'RRRR MONTH')

5.数据文件每月成长量

select a.ts# as "tablespace number",

b.name as "tablspace name",

to_char(a.creation_time,'RRRR MONTH') "MONTH",

SUM(A.BYTES)/1024/1024/1024 "GROWTH SIZE"

FROM SYS.V_$DATAFILE A,SYS.V_$TABLESPACE B

WHERE A.CREATION_TIME>SYSDATE-365

AND A.TS#=B.TS#

GROUP BY A.TS#,B.NAME,TO_CHAR(A.CREATION_TIME,'RRRR MONTH')

6.查看警告日志文件

show parameter dump

检查近段时间告警日志有什么异常

ORA-00600或ORA-07445(留意)

上下班都检查次

7.了解重启过程，重启计划，错误

8.系统资源检查

CPU 内存 I/O

资源消耗规律（eg.月底，月中)

系统繁忙时间和繁忙度

CPU使用率规律

第三方监控软件

9.查看数据库当前等待事件

（空闲与非空闲等待事件）

锁，索引,DDL

10.处理方法

1、看系统资源，资源是否耗尽

CPU使用100%，内存快用完了，用了大量的swap，是否有异常进程，这些异常进程是oracle还是其他应用程序

2、看等待事件，看系统正处于什么状况

3、看告警日志

11.backup/restore

当前库是不是有备份

采用什么方法备份

用oracle的rman？exp/imp？冷备?

还是用第三方工具？netbackup？

还是直接用存储镜像备份？

备份的周期？多长备份一次？备份一次需要多长时间？备份到磁带库还是硬盘上？

表空间的剩余用量:

SET LINESIZE 120

select a.tablespace_name,

sum((a.tots)/1024/1024) "total size",

sum((a.sumb)/1024/1024) "total free size",

sum(a.sumb)*100/sum(a.tots) "pct_free",

sum(a.largest) "max free size",

sum(a.chunks) "free extent number"

from (select tablespace_name,

0 tots,

sum(bytes) sumb,

max(bytes) largest,

count(*) chunks

from dba_free_space a

group by tablespace_name

union

select tablespace_name,sum(bytes) tots,0,0,0

from dba_data_files

group by tablespace_name)a

group by a.tablespace_name

ORDER BY 4;

确认数据文件的使用量:

select

d.tablespace_name tablespace,

d.file_name filename,

d.bytes "total file size",

nvl((d.bytes-s.bytes),d.bytes) "used size",

trunc(((nvl((d.bytes-s.bytes),d.bytes))/d.bytes)*100) PCT_USED

FROM sys.dba_data_files d,

v$datafile v,

(select file_id,sum(bytes) bytes

from sys.dba_free_space

group by file_id)s

where (s.file_id(+)=d.file_id)

and (d.file_name=v.name)

union

select d.tablespace_name tablespace,

d.file_name filename,

d.bytes "total file size",

nvl(t.bytes_cached,0) "used size",

trunc((t.bytes_cached/d.bytes)*100) pct_used

from sys.dba_temp_files d,v$temp_extent_pool t,v$tempfile v

where (t.file_id(+)=d.file_id)

and (d.file_id=v.file#);

查看数据库缓冲快区的HIT RATIO

select 1-(phy.value/(cur.value+con.value)) "cache hit ratio",

round((1-(phy.value/(cur.value+con.value)))*100,2) "ratio"

from v$sysstat cur,v$sysstat con,v$sysstat phy

where cur.name='DB BLOCK GETS'

AND CON.NAME='CONSISTENT GETS'

AND PHY.NAME='PHYSICAL READS'

确认使用者使用PGA的大小

select username,name,value

from v$statname n,v$session s,v$sesstat t

where s.sid=t.sid

and n.statistic#=t.statistic#

and s.type='USER'

AND S.USERNAME IS NOT NULL

AND N.NAME='SESSION PGA MEMORY'

AND USERNAME NOT LIKE 'SYSTEM'

AND T.VALUE>30000;

查看前10名使用CPU用量的联机

select *

from (select

'p',

s.sid,

s.status,

t.value/100/60 "cpu time",

floor(last_call_et/60) "last call et",

to_char(s.logon_time,'mm/dd hh24:mi') "logon time",

s.username,

s.process,

p.spid,

s.module,

s.machine,

s.sql_hash_value

from v$sesstat t,v$session s,v$process p

where t.statistic#=12

and s.sid=t.sid

and s.paddr=p.addr

and s.type='USER'

and s.sql_hash_value!=1425819161

union

select

'N',

s.sid,

s.status,

t.value*-1/100/60 "cpu time",

floor(last_call_et/60) "last call et",

to_char(s.logon_time,'mm/dd hh24:mi') "logon time",

s.username,

s.process,

p.spid,

s.module,

s.machine,

s.sql_hash_value

from v$sesstat t,v$session s,v$process p

where t.statistic#=12

and s.sid=t.sid

and s.paddr=p.addr

and s.type='USER'

and s.sql_hash_value!=1425819161

and t.value<0

order by 4 desc)

where rownum<11;

查询前10名排序量最大使用者联机

select *

from (select s.sid,

s.status,

b.spid,

s.sql_hash_value sesshash,

u.sqlhash sorthash,

s.username,

u.tablespace,

sum(u.blocks*p.value/1024/1024)mbused,

sum(u.extents) noexts,

u.segtype,

s.module||' - '||s.program proginfo

from v$sort_usage u,v$session s,v$parameter p,

v$process b

where u.session_addr=s.saddr

and p.name='DB_BLOCK_SIZE'

and b.addr=s.paddr

group by s.sid,

s.status,

b.spid,

s.sql_hash_value,

u.sqlhash,

s.username,

u.tablespace,

u.segtype,

s.module||' - '||s.program

order by 8 desc,4)

where rownum<11;

查询前10名数据库等待事件

select *

from(select event,total_waits,time_waited,average_wait

from v$system_event

where event not like '%IPC%'

AND EVENT NOT LIKE 'SQL*NET%'

AND EVENT NOT LIKE 'PIPE%'

AND EVENT NOT LIKE 'NULL%'

AND EVENT NOT LIKE 'WAKEUP%'

AND EVENT NOT LIKE 'PX%'

AND EVENT NOT LIKE '%TIMER%'

ORDER BY 3 DESC)

WHERE ROWNUM<11;

查询前10名使用CURSOR最多的使用者联机

select * from (

select s.sid,

v0.value cum_open_cursors,

v1.value cur_open_cursors,

v2.value cache_hits,

v3.value cache_count,

v4.value hard_parse,

v5.value-v4.value soft_parse,

s.osuser,s.machine,

nvl(s.module,s.program) proginfo

from v$sesstat v0,v$sesstat v1,v$sesstat v2,v$sesstat v3,

v$sesstat v4,v$sesstat v5,

v$session s

where v0.statistic#=2

and v0.sid=s.sid

and v1.statistic#=3

and v1.sid=s.sid

and v2.statistic#=191

and v2.sid=s.sid

and v3.statistic#=192

and v3.sid=s.sid

and v4.statistic#=180

and v4.sid=s.sid

and v5.statistic#=179

and v5.sid=s.sid

order by 3 desc,7 desc)

where rownum<11;