----查表的数据量
select table_name, num_rows, blocks, empty_blocks
from user_tables
where table_name in
('DW_PRODUCT', 'DW_BIRTH_INTEGRAL', 'DW_COSTMARK_N', 'DW_CUXIAO_STLS',
'DW_C_VIP', 'DW_DALEIMARK', 'DW_DIM_WARH', 'DW_DIM_WARH_XS',
'DW_DIM_XS_WARH', 'DW_DISPLAY', 'DW_HYJYL', 'DW_MENDIANDAOHUO');
----1、oracle查询表空间信息
select * from DBA_DATA_FILES;
----2、oracle查询表空间使用情况语句
SELECT UPPER(F.TABLESPACE_NAME) "表空间名",
D.TOT_GROOTTE_MB "表空间大小(M)",
D.TOT_GROOTTE_MB - F.TOTAL_BYTES "已使用空间(M)",
TO_CHAR(ROUND((D.TOT_GROOTTE_MB - F.TOTAL_BYTES) / D.TOT_GROOTTE_MB * 100,2),'990.99') || '%' "使用比",
F.TOTAL_BYTES "空闲空间(M)",
F.MAX_BYTES "最大块(M)"
FROM (SELECT TABLESPACE_NAME,
ROUND(SUM(BYTES) / (1024 * 1024), 2) TOTAL_BYTES,
ROUND(MAX(BYTES) / (1024 * 1024), 2) MAX_BYTES
FROM SYS.DBA_FREE_SPACE
GROUP BY TABLESPACE_NAME) F,
(SELECT DD.TABLESPACE_NAME,
ROUND(SUM(DD.BYTES) / (1024 * 1024), 2) TOT_GROOTTE_MB
FROM SYS.DBA_DATA_FILES DD
GROUP BY DD.TABLESPACE_NAME) D
WHERE D.TABLESPACE_NAME = F.TABLESPACE_NAME
ORDER BY 4 DESC;
----3、查询表空间的free space
select tablespace_name,
count(*) as extends,
round(sum(bytes) / 1024 / 1024, 2) as MB,
sum(blocks) as blocks
from dba_free_space
group by tablespace_name;
----4、查询表空间的总容量
select tablespace_name, sum(bytes) / 1024 / 1024 as MB
from dba_data_files
group by tablespace_name;
-----5、查找当前表级锁的SQL如下：
select sess.sid,
sess.serial#,
lo.oracle_username,
lo.os_user_name,
ao.object_name,
lo.locked_mode
from v$locked_object lo,
dba_objects ao,
v$session sess
where ao.object_id = lo.object_id and lo.session_id = sess.sid;
----6、杀掉锁表进程：
----6.1、PLSQL层面查杀
select SID,serial# from v$session where sid = '@待查杀的SID@' ;
alter system kill session 'SID,serial#' immediate;
-----6.2、OS层面查杀
select paddr from v$session where sid = '@待查杀的SID@' ；
select spid from v$process where addr = '@上SQL查询的paddr@'
-----登陆OS 执行 kill -9 @上SQL查询的spid@
----6.3、查询DDL锁
select * from dba_ddl_locks ;
---7、RAC环境中锁查找：
SELECT inst_id,DECODE(request,0,'Holder: ','Waiter: ')||sid sess,
id1, id2, lmode, request, type,block,ctime
FROM GV$LOCK
WHERE (id1, id2, type) IN
(SELECT id1, id2, type FROM GV$LOCK WHERE request>0)
ORDER BY id1, request;
----8、监控当前数据库谁在运行什么SQL语句
select osuser, username, sql_text
from v$session a, v$sqltext b
where a.sql_address =b.address order by address, piece;
----9、查看当前数据库正在执行的SQL
SELECT USERNAME,EVENT, WAIT_CLASS, SQL_TEXT, SQL_FULLTEXT
FROM V$SESSION A, v$sqlarea B
WHERE A.SQL_ID = B.SQL_ID
AND A.WAIT_CLASS <> 'Idle';
----10、Kill执行超时Job（超过一天的为超时）
select 'alter system kill session ''' || sid || ',' || serial# ||
''' immediate ;'
from v$session
where sid in
(select sid from dba_jobs_running t where t.this_date < sysdate - 1)
----11、查询会话执行的实际SQL
SELECT a.SID, a.username, s.sql_text
FROM v$session a, v$sqltext s
WHERE a.sql_address = s.address
AND a.sql_hash_value = s.hash_value
AND a.status = 'ACTIVE'
ORDER BY a.username, a.SID, s.piece;
--12、找使用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$sesstat c
where c.statistic#=12 and
c.sid=a.sid and
a.paddr=b.addr
order by value desc;
----13、查看死锁信息
SELECT (SELECT username
FROM v$session
WHERE SID = a.SID) blocker, a.SID, 'is blocking',
(SELECT username
FROM v$session
WHERE SID = b.SID) blockee, b.SID
FROM v$lock a, v$lock b
WHERE a.BLOCK = 1 AND b.request > 0 AND a.id1 = b.id1 AND a.id2 = b.id2;
----14、具有最高等待的对象
SELECT o.OWNER,o.object_name, o.object_type, a.event,
SUM (a.wait_time + a.time_waited) total_wait_time
FROM v$active_session_history a, dba_objects o
WHERE a.sample_time BETWEEN SYSDATE - 30 / 2880 AND SYSDATE
AND a.current_obj# = o.object_id
GROUP BY o.OWNER,o.object_name, o.object_type, a.event
ORDER BY total_wait_time DESC;
----或
SELECT a.session_id, s.osuser, s.machine, s.program, o.owner, o.object_name,
o.object_type, a.event,
SUM (a.wait_time + a.time_waited) total_wait_time
FROM v$active_session_history a, dba_objects o, v$session s
WHERE a.sample_time BETWEEN SYSDATE - 30 / 2880 AND SYSDATE
AND a.current_obj# = o.object_id
AND a.session_id = s.SID
GROUP BY o.owner,
o.object_name,
o.object_type,
a.event,
a.session_id,
s.program,
s.machine,
s.osuser
ORDER BY total_wait_time DESC;
-----15、查询当前连接会话数
select s.value,s.sid,a.username
from v$sesstat S,v$statname N,v$session A
where n.statistic#=s.statistic# and name='session pga memory' and s.sid=a.sid
order by s.value;
-----16、等待最多的用户
SELECT a.program,
a.session_id,
a.user_id,
d.username,
s.sql_text,
SUM(a.wait_time + a.time_waited) total_wait_time
FROM v$active_session_history a, v$sqlarea s, dba_users d
WHERE a.sample_time BETWEEN SYSDATE - 30 / 2880 AND SYSDATE
AND a.sql_id = s.sql_id
AND a.user_id = d.user_id
GROUP BY a.program, a.session_id, a.user_id, s.sql_text, d.username;
----17、查看消耗资源最多的SQL
SELECT hash_value, executions, buffer_gets, disk_reads, parse_calls
FROM V$SQLAREA
WHERE buffer_gets > 10000000 OR disk_reads > 1000000
ORDER BY buffer_gets + 100 * disk_reads DESC;
----18、查看数据库报告的 语句 @E:\oracle\product\10.2.0\client_1\RDBMS\ADMIN\awrrpt.sql;