ORACLE常用性能监控SQL【一】

来源：小小工匠发布时间：2018-11-01 13:40:20 阅读量：1115

系列

ORACLE常用性能监控SQL【一】

ORACLE常用性能监控SQL【二】

Oracle-动态性能视图解读

系列

死锁后的解决办法

生成Kill Session语句

查看导致死锁的 SQL

查看谁锁了谁

ORA-00054 资源正忙要求指定 NOWAIT

查询绑定变量使用的实际值

监控事例的等待

回滚段的争用情况

查看回滚段名称及大小

查看控制文件

查看日志文件

查看前台正在发出的SQL语句

数据表占用空间大小情况

查看表空间碎片大小

查看表空间占用磁盘情况

查看表的大小倒序排列

查看表空间物理文件的名称及大小

查看Oracle 表空间使用率

查看Temp 表空间实际使用磁盘大小

查看session使用回滚段

查看当前临时表空间使用大小与正在占用临时表空间的sql语句

Temp表空间上进程的查询

查看SGA区剩余可用内存

监控表空间IO比例

监控SGA命中率

监控 SGA 中字典缓冲区的命中率

监控 SGA 享缓存区的命中率应该小于1

监控 SGA 中重做日志缓存区的命中率应该小于1

监控内存和硬盘的排序比率最好使它小于 10

监控字典缓冲区

非系统用户建在SYSTEM表空间中的表

性能最差的SQL

读磁盘数超100次的sql

查找消耗资源比较的sql语句

最频繁执行的sql

查询使用CPU多的用户session

当前每个会话使用的对象数

查看数据库库对象

查看数据库的版本　

查看数据库的创建日期和归档方式

检查角色和权限设置

根据用户名进行授权的对象级特权

根据被授权人进行授权的对象级特权

根据用户名进行授予的系统级特权

根据被授权人进行授予的系统级特权

根据用户名授予的角色

根据被授权人授予的角色

用户名及已被授予的相应权限

查询用户名及相应的配置文件默认的表空间和临时表空间

等待事件V视图

马上该谁等待查询VSESSION_WAIT VSESSION

马上该谁等待SPECIFIC Waits查询VSESSION_WAIT

谁在等待 - 最后10 个等待数查询VSESSION_WAIT_HISTORY

查找P1 P2 P3代表什么查询 VEVENT_NAME

会话开始后的所有等待数查询 VSESSION_EVENT

类的所有会话等待数查询VSESSION_WAIT_CLASS

系统启动后的所有等待数查询VSYSTEM_EVENT

类的系统等待数查询VSYSTEM_WAIT_CLASS

类的系统等待数查询VACTIVE_SESSION_HISTORY

自动工作量仓库AWR 的基本信息

获取生成的trace文件

死锁后的解决办法

如果死锁不能自动释放，就需要我们手工的 kill session

生成Kill Session语句

查看有无死锁对象，如有 kill session

SELECT 'alter system kill session ''' || sid || ',' || serial# || ''';' "Deadlock"

FROM v$session

WHERE sid IN (SELECT sid FROM v$lock WHERE block = 1);

如果有，会返回类似与如下的信息：

alter system kill session '761,876';

.....

kill session：

执行 alter system kill session ‘761,876’(sid 为 761);

注意：应当注意对于 sid 在 100 以下的应当谨慎，可能该进程对应某个application，如对应某个事务,可以 kill

查看导致死锁的 SQL

SELECT s.sid, q.sql_text

FROM v$sqltext q, v$session s

WHERE q.address = s.sql_address AND s.sid = &sid -- 这个&sid 是第一步查询出来的

ORDER BY piece;

执行后，输入对应的sid即可查看对应的sql.

查看谁锁了谁

SELECT s1.username || '@' || s1.machine || ' ( SID=' || s1.sid ||

' ) is blocking ' || s2.username || '@' || s2.machine || ' ( SID=' ||

s2.sid || ' ) ' AS blocking_status

FROM v$lock l1, v$session s1, v$lock l2, v$session s2

WHERE s1.sid = l1.sid

AND s2.sid = l2.sid

AND l1.BLOCK = 1

AND l2.request > 0

AND l1.id1 = l2.id1

AND l2.id2 = l2.id2;

或者

推荐这个，因为使用的是 v$locked_object

SELECT LPAD(' ', DECODE(l.xidusn, 0, 3, 0)) || l.oracle_username User_name,

o.owner,

o.object_name,

o.object_type,

s.sid,

s.serial#

FROM v$locked_object l, dba_objects o, v$session s

WHERE l.object_id = o.object_id

AND l.session_id = s.sid

ORDER BY o.object_id, xidusn DESC;

V$LOCKED_OBJECT只能报发生等待的表级锁,不能报发生等待的行级锁。

ORA-00054 资源正忙，要求指定 NOWAIT

演示：

select * from emp for update ;--通过for update 获取一个排它锁

SQL>select object_name as 对象名称,s.sid,s.serial#,p.spid as 系统进程号

from v$locked_object l , dba_objects o , v$session s , v$process p

where l.object_id=o.object_id and l.session_id=s.sid and s.paddr=p.addr;

对象名称 SID SERIAL# 系统进程号

-------------------------------------------------------------------------------- ---------- ---------- ------------------------

EMP 1411 8865 32720

在另外一个会话中执行

ALTER SYSTEM KILL SESSION '1411,8865';

查询绑定变量使用的实际值

1, SQL还在shared pool中，没有被aged out 替换SQL ID 值即可

select sql_id, name, datatype_string, last_captured, value_string

from v$sql_bind_capture where sql_id = '7nqt558g5gmyr' order by LAST_CAPTURED,

POSITION;

2.请自行替换sql_id，此时是从awr中查询(sql 被 aged out 出 shared pool)

select instance_number,

sql_id,

name,

datatype_string,

last_captured,

value_string

from dba_hist_sqlbind

where sql_id = 'fahv8x6ngrb50'

order by LAST_CAPTURED, POSITION;

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 ;

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;

查看回滚段名称及大小

SELECT segment_name,

tablespace_name,

r.status,

(initial_extent / 1024) initialextent,

(next_extent / 1024) nextextent,

max_extents,

v.curext curextent

FROM dba_rollback_segs r, v$rollstat v

WHERE r.segment_id = v.usn(+)

ORDER BY segment_name;

查看控制文件

SELECT NAME FROM v$controlfile;

查看日志文件

SELECT MEMBER FROM v$logfile;

查看前台正在发出的SQL语句

select user_name,sql_text

　　 from v$open_cursor

　　 where sid in (select sid from (select sid,serial#,username,program

　　 from v$session

　　 where status='ACTIVE'));

数据表占用空间大小情况

select segment_name, tablespace_name, bytes, blocks

from user_segments

where segment_type = 'TABLE'

ORDER BY bytes DESC, blocks DESC;

查看表空间碎片大小

select tablespace_name,round(sqrt(max(blocks)/sum(blocks))*

(100/sqrt(sqrt(count(blocks)))),2) FSFI

from dba_free_space

group by tablespace_name order by 1;

查看表空间占用磁盘情况

select

b.file_id 文件ID号,

b.tablespace_name 表空间名,

b.bytes 字节数,

(b.bytes-sum(nvl(a.bytes,0))) 已使用,

sum(nvl(a.bytes,0)) 剩余空间,

sum(nvl(a.bytes,0))/(b.bytes)*100 剩余百分比

from dba_free_space a,dba_data_files b

where a.file_id=b.file_id

group by b.tablespace_name,b.file_id,b.bytes

order by b.file_id;

查看表的大小，倒序排列

每张表都是作为“段”来存储的，可以通过user_segments视图查看其相应信息。

段（segments）的定义：如果创建一个堆组织表，则该表就是一个段

SELECT SEGMENT_NAME, SUM(BYTES) / 1024 / 1024 MBYTESE

FROM USER_SEGMENTS

WHERE SEGMENT_TYPE = 'TABLE'

GROUP BY SEGMENT_NAME

order by MBYTESE desc;

查看表空间物理文件的名称及大小

SELECT tablespace_name,

file_id,

file_name,

round(bytes / (1024 * 1024), 0) total_space

FROM dba_data_files

ORDER BY tablespace_name;

查看Oracle 表空间使用率

SELECT D.TABLESPACE_NAME,

SPACE || 'M' "SUM_SPACE(M)",

SPACE - NVL (FREE_SPACE, 0) || 'M' "USED_SPACE(M)",

ROUND ( (1 - NVL (FREE_SPACE, 0) / SPACE) * 100, 2) || '%'

"USED_RATE(%)",

FREE_SPACE || 'M' "FREE_SPACE(M)"

FROM ( SELECT TABLESPACE_NAME,

ROUND (SUM (BYTES) / (1024 * 1024), 2) SPACE,

SUM (BLOCKS) BLOCKS

FROM DBA_DATA_FILES

GROUP BY TABLESPACE_NAME) D,

( SELECT TABLESPACE_NAME,

ROUND (SUM (BYTES) / (1024 * 1024), 2) FREE_SPACE

FROM DBA_FREE_SPACE

GROUP BY TABLESPACE_NAME) F

WHERE D.TABLESPACE_NAME = F.TABLESPACE_NAME(+)

UNION ALL --如果有临时表空间

SELECT D.TABLESPACE_NAME,

SPACE || 'M' "SUM_SPACE(M)",

USED_SPACE || 'M' "USED_SPACE(M)",

ROUND (NVL (USED_SPACE, 0) / SPACE * 100, 2) || '%' "USED_RATE(%)",

NVL (FREE_SPACE, 0) || 'M' "FREE_SPACE(M)"

FROM ( SELECT TABLESPACE_NAME,

ROUND (SUM (BYTES) / (1024 * 1024), 2) SPACE,

SUM (BLOCKS) BLOCKS

FROM DBA_TEMP_FILES

GROUP BY TABLESPACE_NAME) D,

( SELECT TABLESPACE_NAME,

ROUND (SUM (BYTES_USED) / (1024 * 1024), 2) USED_SPACE,

ROUND (SUM (BYTES_FREE) / (1024 * 1024), 2) FREE_SPACE

FROM V$TEMP_SPACE_HEADER

GROUP BY TABLESPACE_NAME) F

WHERE D.TABLESPACE_NAME = F.TABLESPACE_NAME(+)

ORDER BY 1;

SELECT a.tablespace_name "表空间名",

total "表空间大小",

free "表空间剩余大小",

(total - free) "表空间使用大小",

total / (1024 * 1024 * 1024) "表空间大小(G)",

free / (1024 * 1024 * 1024) "表空间剩余大小(G)",

(total - free) / (1024 * 1024 * 1024) "表空间使用大小(G)",

round((total - free) / total, 4) * 100 "使用率 %"

FROM (SELECT tablespace_name, SUM(bytes) free

FROM dba_free_space

GROUP BY tablespace_name) a,

(SELECT tablespace_name, SUM(bytes) total

FROM dba_data_files

GROUP BY tablespace_name) b

WHERE a.tablespace_name = b.tablespace_name

查看Temp 表空间实际使用磁盘大小

Select f.tablespace_name,

d.file_name "Tempfile name",

round((f.bytes_free + f.bytes_used) / 1024 / 1024, 2) "total MB",

round(((f.bytes_free + f.bytes_used) - nvl(p.bytes_used, 0)) / 1024 / 1024,

2) "Free MB",

round(nvl(p.bytes_used, 0) / 1024 / 1024, 2) "Used MB",

round((round(nvl(p.bytes_used, 0) / 1024 / 1024, 2) /

round((f.bytes_free + f.bytes_used) / 1024 / 1024, 2)) * 100,

2) as "Used_Rate(%)"

from SYS.V_$TEMP_SPACE_HEADER f,

DBA_TEMP_FILES d,

SYS.V_$TEMP_EXTENT_POOL p

where f.tablespace_name(+) = d.tablespace_name

and f.file_id(+) = d.file_id

and p.file_id(+) = d.file_id;

查看session使用回滚段

SELECT r.name 回滚段名,

s.sid,

s.serial#,

s.username 用户名,

t.status,

t.cr_get,

t.phy_io,

t.used_ublk,

t.noundo,

substr(s.program, 1, 78) 操作程序

FROM sys.v_$session s,sys.v_$transaction t,sys.v_$rollname r

WHERE t.addr = s.taddr and t.xidusn = r.usn

ORDER BY t.cr_get,t.phy_io;

查看当前临时表空间使用大小与正在占用临时表空间的sql语句

select sess.SID, segtype, blocks * 8 / 1000 "MB", sql_text

from v$sort_usage sort, v$session sess, v$sql sql

where sort.SESSION_ADDR = sess.SADDR

and sql.ADDRESS = sess.SQL_ADDRESS

order by blocks desc;

Temp表空间上进程的查询

select a.tablespace, b.sid, b.serial#, a.blocks,c.sql_text

from v$sort_usage a,v$session b,v$sqltext c

where a.session_addr = b.saddr

and b.sql_address = c.address

order by a.tablespace,b.sid,b.serial#,c.address, c.piece;

查看SGA区剩余可用内存

select name,

　　　　　　sgasize/1024/1024　　　　　　　　"Allocated(M)",

　　　　　　bytes/1024　　　　　　　　　　　 "**空间(K)",

　　　　　　round(bytes/sgasize*100, 2)　　　"**空间百分比(%)"

　　 from (select sum(bytes) sgasize from sys.v_$sgastat) s, sys.v_$sgastat f

　　 where f.name = 'free memory';

监控表空间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;

监控SGA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 ;

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 ;

监控 SGA **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;

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');

监控内存和硬盘的排序比率，最好使它小于 .10

SELECT name, value

FROM v$sysstat

WHERE name IN ('sorts (memory)', 'sorts (disk)') ;

监控字典缓冲区

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

FROM V$ROWCACHE ;

非系统用户建在SYSTEM表空间中的表

SELECT owner,table_name

FROM DBA_TABLES

WHERE tablespace_name in('SYSTEM','USER_DATA') AND

owner NOT IN('SYSTEM','SYS','OUTLN', 'ORDSYS','MDSYS','SCOTT', 'HOSTEAC');

性能最差的SQL

SELECT * FROM ( SELECT PARSING_USER_ID EXECUTIONS,SORTS,COMMAND_TYPE,DISK_READS,sql_text

FROM v$sqlarea

ORDER BY disk_reads DESC)

WHERE ROWNUM<100;

读磁盘数超100次的sql

select * from sys.v_$sqlarea where disk_reads>100;

查找消耗资源比较的sql语句

Select se.username,

se.sid,

su.extents,

su.blocks * to_number(rtrim(p.value)) as Space,

tablespace,

segtype,

sql_text

from v$sort_usage su, v$parameter p, v$session se, v$sql s

where p.name = 'db_block_size'

and su.session_addr = se.saddr

and s.hash_value = su.sqlhash

and s.address = su.sqladdr

order by se.username, se.sid;

最频繁执行的sql

select * from sys.v_$sqlarea where executions>100;

查询使用CPU多的用户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;

当前每个会话使用的对象数

SELECT a.sid,s.terminal,s.program,count(a.sid)

FROM V$ACCESS a,V$SESSION s

WHERE a.owner <> 'SYS'AND s.sid = a.sid

GROUP BY a.sid,s.terminal,s.program

ORDER BY count(a.sid) ;

查看数据库库对象

SELECT owner, object_type, status, COUNT(*) count#

FROM all_objects

GROUP BY owner, object_type, status;

查看数据库的版本　

SELECT version

FROM product_component_version

WHERE substr(product, 1, 6) = 'Oracle';

查看数据库的创建日期和归档方式

SELECT created, log_mode, log_mode FROM v$database;

检查角色和权限设置

根据用户名进行授权的对象级特权

select b.owner || '.' || b.table_name obj,

b.privilege what_granted,

b.grantable,

a.username

from sys.dba_users a, sys.dba_tab_privs b

where a.username = b.grantee

order by 1, 2, 3;

根据被授权人进行授权的对象级特权

Select owner || '.' || table_name obj,

privilege what_granted,

grantable,

grantee

from sys.dba_tab_privs

where not exists (select 'x' from sys.dba_users where username = grantee)

order by 1, 2, 3;

根据用户名进行授予的系统级特权

select b.privilege what_granted, b.admin_option, a.username

from sys.dba_users a, sys.dba_sys_privs b

where a.username = b.grantee

order by 1, 2;

根据被授权人进行授予的系统级特权

select privilege what_granted, admin_option, grantee

from sys.dba_sys_privs

where not exists (select 'x' from sys.dba_users where username = grantee)

order by 1, 2;

根据用户名授予的角色

select b.granted_role ||

decode(admin_option, 'YES', ' (With Admin Option)', null) what_granted,

a.username

from sys.dba_users a, sys.dba_role_privs b

where a.username = b.grantee

order by 1;

根据被授权人授予的角色

select granted_role ||

decode(admin_option, 'YES', ' (With Admin Option)', null) what_granted,

grantee

from sys.dba_role_privs

where not exists (select 'x' from sys.dba_users where username = grantee)

order by 1;

用户名及已被授予的相应权限

select a.username,

b.granted_role ||

decode(admin_option, 'YES', ' (With Admin Option)', null) what_granted

from sys.dba_users a, sys.dba_role_privs b

where a.username = b.grantee

UNION

select a.username,

b.privilege ||

decode(admin_option, 'YES', ' (With Admin Option)', null) what_granted

from sys.dba_users a, sys.dba_sys_privs b

where a.username = b.grantee

UNION

select a.username,

b.table_name || '-' || b.privilege ||

decode(grantable, 'YES', ' (With Grant Option)', null) what_granted

from sys.dba_users a, sys.dba_tab_privs b

where a.username = b.grantee

order by 1;

查询用户名及相应的配置文件、默认的表空间和临时表空间

Select username, profile, default_tablespace, temporary_tablespace, created

from sys.dba_users

order by username;

等待事件V$视图

在Oracle 10g中V$SESSION_WAIT中的所有等待事件列现在都在V$SESSION中。因此，确保查询等待信息的 V$SESSION，因为它是一个更快的视图。V$ACTIVE_SESSION_HISTORY (ASH)将许多重要统计数据合并为一个视图或一个报表(ASH报表)。

马上该谁等待–查询V$SESSION_WAIT / V$SESSION

select event,

sum(decode(wait_time, 0, 1, 0)) "Waiting Now",

sum(decode(wait_time, 0, 0, 1)) "Previous Waits",

count(*) "Total"

from v$session_wait

group by event

order by count(*);

马上该谁等待；SPECIFIC Waits–查询V$SESSION_WAIT

SELECT /*+ ordered */

sid, event, owner, segment_name, segment_type, p1, p2, p3

FROM v$session_wait sw, dba_extents de

WHERE de.file_id = sw.p1

AND sw.p2 between de.block_id and de.block_id + de.blocks - 1

AND (event = 'buffer busy waits' OR event = 'write complete waits')

AND p1 IS NOT null

ORDER BY event, sid;

谁在等待 - 最后10 个等待数–查询V$SESSION_WAIT_HISTORY

SELECT /*+ ordered */

sid, event, owner, segment_name, segment_type, p1, p2, p3

FROM v$session_wait sw, dba_extents de

WHERE de.file_id = sw.p1

AND sw.p2 between de.block_id and de.block_id + de.blocks - 1

AND (event = 'buffer busy waits' OR event = 'write complete waits')

AND p1 IS NOT null

ORDER BY event, sid;

查找P1, P2, P3代表什么–查询 V$EVENT_NAME

select event#, name, parameter1 p1, parameter2 p2, parameter3 p3

from v$event_name

where name in ('buffer busy waits', 'write complete waits');

会话开始后的所有等待数–查询 V$SESSION_EVENT

select sid, event, total_waits, time_waited, event_id

from v$session_event

where time_waited > 0

order by time_waited;

类的所有会话等待数–查询V$SESSION_WAIT_CLASS

select sid, wait_class, total_waits from v$session_wait_class;

系统启动后的所有等待数–查询V$SYSTEM_EVENT

select event, total_waits, time_waited, event_id

from v$system_event

where time_waited > 0

order by time_waited;

类的系统等待数–查询V$SYSTEM_WAIT_CLASS

select wait_class, total_waits

from v$system_wait_class

order by total_waits desc;

类的系统等待数–查询V$ACTIVE_SESSION_HISTORY

–In the query below, the highest count session is leader in non-idle wait events.

select session_id, count(1)

from v$active_session_history

group by session_id

order by 2;

–In the query below, find the SQL for the leader in non-idle wait events.

select c.sql_id, a.sql_text

from v$sql a,

(select sql_id, count(1)

from v$active_session_history b

where sql_id is not null

group by sql_id order by 2 desc) c

where rownum <= 5

order by rownum;

自动工作量仓库(AWR) 的基本信息

自动工作量仓库(AWR)在默认情况下，仓库用小时填充，保留期是7天。

AWR使用多少空间

SQL> Select occupant_name,occupant_desc,space_usage_kbytes from v$sysaux_occupants where occupant_name like '%AWR%';

OCCUPANT_NAME OCCUPANT_DESC SPACE_USAGE_KBYTES

----------------- ---------------------------------- ------------------

SM/AWR Server Manageability - Automatic Workload Repository 215616

SQL>

系统上最原始的AWR信息是什么？

SQL> select dbms_stats.get_stats_history_availability from dual;

GET_STATS_HISTORY_AVAILABILITY

-------------------------------------------------------------

20-OCT-16 12.04.49.088829000 AM -04:00

什么是AWR信息的保留期？

SQL> select dbms_stats.get_stats_history_retention from dual;

GET_STATS_HISTORY_RETENTION

---------------------------

将AWR信息的保留期更改为15天？

SQL> EXEC dbms_stats.alter_stats_history_retention(15);

PL/SQL 过程已成功完成。

获取生成的trace文件

开启SQL跟踪后，会生成一个trace文件，通过初始化参数user_dump_dest配置其所在目录，该参数的值可以通过下面方法获取到：

select name, value from v$parameter where name = 'user_dump_dest'

trace文件的名字是独立于版本和平台的，在大部分常见的平台下，命名结构如下：

{instance name}_{process name}_{process id}.trc

1）instance name

初始化参数instance_name的小写值。通过v$instance视图的instance_name列可以得到这个值。

2）process name

产生跟踪文件进程的名字的小写值。对于专有服务器进程，使用ora，对于共享服务器进程，可以通过v$diapatcher或v$shared_server视图的name列获得。对于并行从属进程，可以通过v$px_process视图server_name列获得，对于其他多数后台进程来说，可以通过v$bgprocess视图的name列获得。

3）process id

操作系统层面的进程标记。这个值可以通过v$process视图的spid列获取。

根据这些信息，可以通过下面的方式获取trace文件名：

select s.SID,

s.SERVER,

lower(case

when s.SERVER in ('DEDICATED', 'SHARED') then

i.INSTANCE_NAME || '_' || nvl(pp.SERVER_NAME, nvl(ss.NAME, 'ora')) || '_' ||

p.SPID || '.trc'

else

null

end) as trace_file_name

from v$instance i,

v$session s,

v$process p,

v$px_process pp,

v$shared_server ss

where s.PADDR = p.ADDR

and s.SID = pp.SID(+)

and s.PADDR = ss.PADDR(+)

and s.TYPE = 'USER'

and s.SID = 'your sid'

order by s.SID

将上面的’your sid’替换为你的session的sid就可以查出指定session生成的trace文件的名字，session的sid在v$session视图中得到，或者直接查询当前session的sid：

select userenv('sid') from dual

或者

select sid from v$mystat a where rownum=1 ;

将路径（user_dump_dest）和文件名结合在一起，我们就得到了trace文件的完整路径。

而在Oracel 11g中，查询当前会话生成的trace文件则非常简单：

select value from v$diag_info where name = 'Default Trace File'

---------------------

作者：小小工匠

来源：CSDN

原文：https://blog.csdn.net/yangshangwei/article/details/52449489

标签：数据库

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