自己总结的ORACLE日常运维常用的SQL

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wg_FFiiacBB 2018-01-27 19:49:33 博主文章分类：Oracle运维与SQL开发

文章标签 oracle运维j 文章分类 运维

-- 会话被阻塞
select t.BLOCKING_SESSION ,t.sid,t.serial# ,t.* from v$session t where t.BLOCKING_SESSION is not null;

历史session:
select * from V$ACTIVE_SESSION_HISTORY;

-- 当前正在执行的SQL
select sql.INST_ID,sql.SQL_TEXT,sql.SQL_ID,se.* from gv$sqlarea sql ,gv$session se where sql.ADDRESS=se.SQL_ADDRESS and sql.INST_ID=se.INST_ID;

--- 通过进程定位session
select p.SPID,s.* from gv$process p , gv$session s where p.ADDR=s.PADDR and p.INST_ID=s.INST_ID and p.SPID='2394';
select p.SPID from gv$process p , gv$session s where p.ADDR=s.PADDR and p.INST_ID=s.INST_ID and s.sid in (select sid from v$mystat);

-- 并发session
select * from v$px_session

--- 查看进程正在执行的SQL
select S.EVENT,s.BLOCKING_SESSION,s.BLOCKING_INSTANCE, p.SPID,sql.SQL_TEXT,s.* from gv$process p , gv$session s,gv$sqlarea sql
where p.ADDR=s.PADDR and p.INST_ID=s.INST_ID and sql.INST_ID=s.INST_ID
and sql.ADDRESS=s.SQL_ADDRESS
and s.BLOCKING_SESSION is not null
-- and p.SPID='2394';
;

# 查看阻塞其它session的session
select 'kill -9 ' || p.SPID,p.SPID,s.* from gv$process p ,
gv$session s where p.ADDR=s.PADDR and p.INST_ID=s.INST_ID
and (s.sid,s.inst_id) in (select t.BLOCKING_SESSION,t.BLOCKING_INSTANCE
from gv$session t where t.BLOCKING_SESSION is not null)

--查询谁锁定
SELECT /*+ rule */
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;

select SID,SERIAL# from V$session where SID in (select sid from v$enqueue_lock t where t.type='TO');

--释放session Sql 语法:
alter system kill session 'sid, serial#'
--例子：
alter system kill session '379, 21132';

-- 游标
select * from gv$open_cursor;
select inst_id,sid,count(1) from gv$open_cursor group by inst_id,sid order by count(1) desc;
select inst_id, substr(sql_text,1,80),count(1) from gv$open_cursor group by inst_id, substr(sql_text,1,80) order by count(1) desc;

-- 闪回查询
select * from t as of timestamp to_timestamp('2010-06-29 22:57:47', 'yyyy-mm-dd hh24:mi:ss');
select * from t as of scn 1060174;
select * from t as of timestamp sysdate-5/24/60;

撤销表空间使用情况：
SELECT sess.inst_id,sess.SID,sess.serial#, sess.osuser, sess.username,
rseg.segment_name SEGMENT, rseg.tablespace_name, trans.used_ublk,
trans.used_ublk*8 "UNDO SIZE(KB)", rseg.STATUS, sa.sql_text
FROM gv$session sess, gv$transaction trans, dba_rollback_segs rseg, gv$sqlarea sa
WHERE sess.inst_id=trans.inst_id and trans.inst_id=sa.inst_id
and sess.taddr=trans.addr AND trans.xidusn=rseg.segment_id(+)
AND sa.ADDRESS=sess.SQL_ADDRESS
ORDER BY sql_text;

SELECT * FROM dba_rollback_segs rseg;
SELECT * FROM gv$transaction ;
SELECT * FROM DBA_UNDO_EXTENTS t where t.status='ACTIVE';
SELECT t.STATUS,sum(t.BYTES)/1024/1024/1024 FROM DBA_UNDO_EXTENTS t group by t.STATUS
select * from dba_segments t where t.segment_name='_SYSSMU10_1197734989$';

--查看当前哪些用户使用撤销段以及段的大小，启动时间，活动状态等
SELECT t.xidusn,t.start_time,t.used_ublk,t.status, s.username,r.segment_name
FROM v$transaction t
JOIN v$session s ON t.ses_addr = s.saddr
JOIN dba_rollback_segs r ON r.segment_id = t.xidusn ;

-- SQL
SELECT seg.BYTES/1024/1024/1024, sql.SQL_TEXT, t.xidusn,t.start_time,t.used_ublk,t.status, s.username,r.segment_name
FROM gv$transaction t
JOIN gv$session s ON t.ses_addr = s.saddr and t.INST_ID = s.INST_ID
JOIN dba_rollback_segs r ON r.segment_id = t.xidusn
JOIN gV$sqlarea sql on sql.ADDRESS=s.SQL_ADDRESS and sql.INST_ID = s.INST_ID
JOIN dba_segments seg on r.segment_name=seg.segment_name

select t.TABLESPACE_NAME,t.STATUS,sum(t.BYTES)/1024/1024 from DBA_UNDO_EXTENTS t
group by t.TABLESPACE_NAME,t.STATUS
order by t.TABLESPACE_NAME,t.STATUS
-----------------------------------------------------------------------------
-- 查看表空间使用率

select a.tablespace_name,
round(a.maxbytes /1024/1024/1024) "Sum GB",
round((a.bytes - b.free_bytes) /1024/1024/1024) "used GB",
(a.bytes - b.free_bytes) "used ",
round((a.maxbytes-(a.bytes - b.free_bytes)) /1024/1024/1024) "free_all GB",
round(((a.bytes - b.free_bytes) / a.maxbytes) * 100, 2) "percent_used"
from (select tablespace_name, sum(decode(maxbytes,0,decode(autoextensible,'YES',34359721984,bytes),maxbytes)) maxbytes,sum(bytes) bytes
from dba_data_files
group by tablespace_name) a,
(select tablespace_name, sum(bytes) free_bytes
from dba_free_space
group by tablespace_name) b
where a.tablespace_name = b.tablespace_name
and a.tablespace_name in ('USERS')
order by ((a.bytes - b.free_bytes) / a.maxbytes) desc;

select

b.file_id 文件ID号,

b.tablespace_name 表空间名,

b.bytes/1024/1024||'M'字节数,

(b.bytes-sum(nvl(a.bytes,0)))/1024/1024||'M' 已使用,

sum(nvl(a.bytes,0))/1024/1024||'M' 剩余空间,

100 - sum(nvl(a.bytes,0))/(b.bytes)*100 占用百分比

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;

-- 查看哪个表的记录数最多
select t.num_rows,t.* from dba_tables t where owner='AMRDCS' order by t.num_rows desc;
-- 查询空块多的TABLE
select ex.owner,ex.segment_name,ex.segment_type,round(sum(ex.bytes)/1024/1024) tab_free from dba_free_space sp, dba_extents ex
where sp.block_id=ex.block_id
group by ex.owner,ex.segment_name,ex.segment_type
order by tab_free desc;

-- 查看数据库整体各个时间段的负载，每小时一天记录
WITH sysstat AS
(select sn.begin_interval_time begin_interval_time,
sn.end_interval_time end_interval_time,
ss.stat_name stat_name,
ss.value e_value,
lag(ss.value, 1) over(order by ss.snap_id) b_value
from dba_hist_sysstat ss, dba_hist_snapshot sn
where trunc(sn.begin_interval_time) >= sysdate - 7
and ss.snap_id = sn.snap_id
and ss.dbid = sn.dbid
and ss.instance_number = sn.instance_number
and ss.dbid = (select dbid from v$database)
and ss.instance_number = (select instance_number from v$instance)
and ss.stat_name = 'DB time')
select to_char (BEGIN_INTERVAL_TIME, 'mm-dd hh24:mi') || to_char (END_INTERVAL_TIME, '
hh24:mi') date_time, stat_name, round((e_value - nvl(b_value, 0)) / (extract(day
from(end_interval_time - begin_interval_time)) * 24 * 60 * 60 + extract(hour
from(end_interval_time - begin_interval_time)) * 60 * 60 + extract(minute
from(end_interval_time - begin_interval_time)) * 60 + extract(second
from(end_interval_time - begin_interval_time))), 0) per_sec
from sysstat
where(e_value - nvl(b_value, 0)) > 0 and nvl(b_value, 0) > 0

-----------------------------------------------------------------------------
查询归档日志大小
select t.thread#,sum(t.BLOCKS*t.BLOCK_SIZE/1024/1024/1024) from v$archived_log t where t.FIRST_TIME > sysdate-1 group by t.thread#;

SELECT * FROM table(DBMS_XPLAN.DISPLAY_CURSOR('0jytavpsa7yaj',0));

select t.thread#,to_char(t.FIRST_TIME,'yyyymmdd hh24'),round(sum(t.BLOCKS*t.BLOCK_SIZE/1024/1024/1024)) from v$archived_log t
where t.FIRST_TIME > sysdate-1 group by t.thread#,to_char(t.FIRST_TIME,'yyyymmdd hh24')
order by 1,2 ;

----------------------------------------------------------------------------
sql优化相关包
DBMS_ADVISOR, DBMS_SQLTUNE, DBMS_AUTO_SQLTUNE, and DBMS_WORKLOAD_REPOSITORY packages
select * from dba_advisor_definitions;
select * from DBA_ADVISOR_FINDINGS;
select dbms_space.asa_recommendations('TRUE', 'TRUE', 'FALSE') from dual;

根据SQL_ID查看执行计划
select * from table(dbms_xplan.display_awr('sql_id'));
select * from table(dbms_xplan.display_cursor('sql_id'))
select * from table(dbms_xplan.display_cursor('sql_id',null,'ADVANCED ALLSTATS LAST PEEKED_BINDS'));

select * from table(dbms_xplan.display_awr('sql_id'));

----------------------------------------------------------
关联关系查询：
select t.name,t.referenced_owner,t.referenced_name,s.type,s.text
from user_dependencies t,user_source s
where s.name=t.name and upper(s.text) like '%'||t.referenced_name ||'%'
--and t.name=upper('sa_customer_analysis_pkg')
and t.referenced_name=upper('hp_customer_temp_rec');
------------------------------------------------------------

查看备份进度（查询v$session_longops）
select sid,serial#,context,sofar,totalwork round(sofar/totalwork*100,2) "% Complete",
from v$session_longops
where opname like 'RMAN:%'
and opname NOT LIKE 'RMAN: aggregate%';

------------------------------------------------------------
12c 审计
select * from UNIFIED_AUDIT_TRAIL order by event_timestamp desc

------------------------------------------------------------
查询绑定变量值
SELECT SQL_ID,NAME, POSITION, value_string, ANYDATA.accesstimestamp(value_anydata)
From gV$sql_Bind_Capture A
Where sql_id='aqfcs7drzzcfw';