oracle常用性能

标签：orm   execution   lstat   message   extent   obj   to_char   数据   表空间   

--根据sql查询具体sql的sql_id
select * from dba_hist_sqltext t where t.sql_text like ‘INSERT ALL INTO TT_DEDUCT_SCAT_DEDUCT_RESULT%‘;
--根据sql id查看执行计划aanqrwv9p5x5s
select * from table(dbms_xplan.display_cursor(‘9axn49wsxyn64‘));

-- 查看花费时间
SELECT T.TARGET,
T.SQL_ID,
T.TIME_REMAINING,
T.ELAPSED_SECONDS,
T.SOFAR,
T.TOTALWORK,
T.START_TIME,
T.LAST_UPDATE_TIME,
T.SID,
T.SERIAL#,
T.MESSAGE
FROM V$SESSION_LONGOPS T
WHERE T.SQL_ID IN (‘9axn49wsxyn64‘);

--查看SQL等待状态
select *
from V$SESSION_WAIT t
where t.SID IN
(SELECT v.SID FROM V$SESSION V WHERE V.SQL_ID IN (‘d0qs5muru61k8‘/*,‘dq47ryxhrccm0‘,‘d0qs5muru61k8‘*/));

-- 重建索引
alter index IDX_TT_BILLING_WAYBILL_1 REBUILD;

-- 重建分区索引
alter index IDX_TT_BILLING_WAYBILL_3 REBUILD partition BILLING_W_201012;

--表分析
analyze table TT_BILLING_WAYBILL compute statistics (sample 20%);

BEGIN
dbms_stats.gather_table_stats(ownname=>‘exp5‘,tabname=>‘TT_BILLING_WAYBILL‘,estimate_percent=>30,cascade=> TRUE);
END;

--索引分析
analyze index indexname compute statistics;

-- 分析表
analyze table ... validate structure;

-- 查看表空间
--col tablespace_name format a10;
SELECT F.TABLESPACE_NAME,
A.TOTAL,
U.USED,
F.FREE,
ROUND((U.USED / A.TOTAL) * 100) "% used",
ROUND((F.FREE / A.TOTAL) * 100) "% Free"
FROM (SELECT TABLESPACE_NAME, SUM(BYTES / (1024 * 1024)) TOTAL
FROM DBA_DATA_FILES
GROUP BY TABLESPACE_NAME) A,
(SELECT TABLESPACE_NAME, ROUND(SUM(BYTES / (1024 * 1024))) USED
FROM DBA_EXTENTS
GROUP BY TABLESPACE_NAME) U,
(SELECT TABLESPACE_NAME, ROUND(SUM(BYTES / (1024 * 1024))) FREE
FROM DBA_FREE_SPACE
GROUP BY TABLESPACE_NAME) F
WHERE A.TABLESPACE_NAME = F.TABLESPACE_NAME
AND A.TABLESPACE_NAME = U.TABLESPACE_NAME;

-- 查询锁定的表
SELECT /*+ rule */
S.USERNAME,
DECODE(L.TYPE, ‘TM‘, ‘TABLE LOCK‘, ‘TX‘, ‘ROW LOCK‘, NULL) LOCK_LEVEL,
O.OWNER,
O.OBJECT_NAME,
O.OBJECT_TYPE,
S.SID,
S.SERIAL#,
S.TERMINAL,
S.MACHINE,
S.PROGRAM,
S.OSUSER,
S.LOGON_TIME,
S.SID
FROM V$SESSION S, V$LOCK L, DBA_OBJECTS O
WHERE L.SID = S.SID
AND L.ID1 = O.OBJECT_ID(+)
AND S.USERNAME IS NOT NULL

--session正在执行的 sql
SELECT /*+ ORDERED */
SQL_TEXT
FROM V$SQLTEXT A
WHERE (A.HASH_VALUE, A.ADDRESS) IN
(SELECT DECODE(SQL_HASH_VALUE, 0, PREV_HASH_VALUE, SQL_HASH_VALUE),
DECODE(SQL_HASH_VALUE, 0, PREV_SQL_ADDR, SQL_ADDRESS)
FROM V$SESSION B
WHERE B.SID = ‘1549‘) /* 此处233 为SID*/
ORDER BY PIECE ASC;

--通过TOAD的WAITE事件查正在等待的什么

SELECT *

FROM DBA_EXTENTS E

WHERE E.FILE_ID = 1054

AND E.BLOCK_ID < 268553

AND E.BLOCK_ID + E.BLOCKS > 268553

--查看临时表空间使用
select b.SID,
b.SQL_ID,
b.MACHINE,
b.USERNAME,
sum(blocks) * 8 / 1024 / 1024 temp_size
from v$tempseg_usage a, v$session b
where a.SESSION_NUM = b.SERIAL#
group by b.SID,
b.SQL_ID,
b.MACHINE,
b.USERNAME,SESSION_NUM

--历史执行计划
select to_char(x.end_interval_time, ‘YYYYMMDD HH24:MI:SS‘),
Y.executions_total,

Y.*

from dba_hist_snapshot x, dba_hist_sqlstat y

where x.snap_id = y.snap_id

and y.sql_id in (‘53wb82q5m4ff9‘)

and x.instance_number = y.instance_number

and x.end_interval_time >

to_date(‘2017-03-01 00:30‘, ‘yyyy-mm-dd hh24:mi‘)

-- and y.executions_delta <> 0

and x.instance_number = y.instance_number

order by 2 desc,1 asc;

--查询事务回滚段的使用情况，数值有增加则在写数据否则在回滚

select sw.inst_id,
s.sid,
s.sql_hash_value,
s.osuser,
to_char(s.LOGON_TIME, ‘YYYY-MM-DD HH24:MI:SS‘) logontime,
sw.event,
s.username,
t.xidusn,
round(t.used_ublk * x.VALUE / 1024 / 1024, 2) "used_undo M"
from gv$transaction t, gv$session s, gv$session_wait sw, v$parameter x
where t.ADDR = s.TADDR
and t.INST_ID = s.INST_ID
and s.inst_id = sw.inst_id
and s.sid = sw.sid
and x.name = ‘db_block_size‘
order by "used_undo M" desc;

--查询SQLID的绑定变量值

select sql_id,
name,
datatype_string,
case datatype
when 180 then --TIMESTAMP
to_char(ANYDATA.accesstimestamp(t.value_anydata),
‘YYYY/MM/DD HH24:MI:SS‘)
else
t.value_string
end as bind_value,
last_captured
from v$sql_bind_capture t
where sql_id = ‘5c2gq85rvycay‘;

oracle常用性能

标签：orm   execution   lstat   message   extent   obj   to_char   数据   表空间   

原文地址：http://www.cnblogs.com/ng1991/p/7061477.html