SYSAUX表空间中的WRH$_SQLTEXT，WRH$_SQL_PLAN 移动LOBSEGMENT类型

SELECT A.TABLE_NAME,

A.COLUMN_NAME,

B.SEGMENT_NAME,

B.SEGMENT_TYPE,

B.TABLESPACE_NAME,

B.BYTES / 1024 / 1024,

B.BLOCKS,

B.EXTENTS

FROM dba_LOBS A, dba_SEGMENTS B

WHERE A.SEGMENT_NAME = B.SEGMENT_NAME

ORDER BY B.BYTES DESC;

表名 字段名 占用空间M

WRH$_SQLTEXT SQL_TEXT SYS_LOB0000006331C00004$$ LOBSEGMENT SYSAUX 2320 296960 263

WRH$_SQL_PLAN OTHER_XML SYS_LOB0000006339C00038$$ LOBSEGMENT SYSAUX 2264 289792 280

WRH$_SQLTEXT：保存的是快照期间的SQL。

SQL>SELECT * FROM WRH$_SQLTEXT;

WRH$_SQL_PLAN：保留了快照期间SQL的执行计划。

SQL>SELECT * FROM WRH$_SQL_PLAN

SQL> TRUNCATE TABLE WRH$_SQLTEXT;

Table truncated.

SQL> TRUNCATE TABLE WRH$_SQL_PLAN;

Table truncated.

--清除awr的历史记录,shared pool及buffer cache

exec dbms_workload_repository.drop_snapshot_range(xxx,xxx);

alter system flush shared_pool;

alter system flush buffer_cache;

--清除dba_hist_sql_plan视图,实际上清除wrh$_sql_plan, wrh$_sqltext, wrh$_sqlstat

truncate table wrh$_sql_plan;

--清除dba_hist_sql_sqltext以及dba_hist_sqlstat视图

truncate table wrh$_sqltext;

truncate table wrh$_sqlstat;

select count(*) from dba_hist_sql_plan;

　　COUNT(*)

　　----------

　　0

select count(*) from dba_hist_sqltext;

　　COUNT(*)

　　----------

　　0

exec DBMS_WORKLOAD_REPOSITORY.DROP_SNAPSHOT_RANGE(low_snap_id => 543, high_snap_id => 544, dbid => 3580899532);



select * from dba_tablespaces

select 'ALTER TABLE '||owner||'.'||table_name||' MOVE TABLESPACE NNC_DATA01_NEW;' from dba_tables where tablespace_name='NNC_DATA01'

select 'ALTER INDEX '||owner||'.'||INDEX_NAME||' REBUILD TABLESPACE NNC_DATA02_NEW;' from dba_indexes

where owner='xxx' and tablespace_name='NNC_DATA02'

select OWNER,SEGMENT_NAME,SEGMENT_TYPE,TABLESPACE_NAME from dba_segments

where owner='xxx' and tablespace_name='NNC_DATA01'

and SEGMENT_TYPE='LOBSEGMENT';

SELECT A.TABLE_NAME,

A.COLUMN_NAME,

B.SEGMENT_NAME,

B.SEGMENT_TYPE,

B.TABLESPACE_NAME,

B.BYTES / 1024 / 1024,

B.BLOCKS,

B.EXTENTS

FROM dba_LOBS A, dba_SEGMENTS B

WHERE A.SEGMENT_NAME = B.SEGMENT_NAME

and b.segment_name in (select SEGMENT_NAME

from dba_segments

where owner='xxx' and tablespace_name='NNC_DATA01'

and SEGMENT_TYPE='LOBSEGMENT');

--ALTER TABLE NCV56.tablename MOVE TABLESPACE INDEX01 LOB(FILECONTENT) STORE AS(TABLESPACE INDEX01_NEW);

SELECT 'ALTER TABLE NCV56.'||A.TABLE_NAME||' MOVE TABLESPACE NNC_DATA01 LOB('||COLUMN_NAME||') STORE AS(TABLESPACE NNC_DATA01_NEW);'

FROM dba_LOBS A, dba_SEGMENTS B

WHERE A.SEGMENT_NAME = B.SEGMENT_NAME

and b.segment_name in (select SEGMENT_NAME

from dba_segments

where owner='xxx' and tablespace_name='NNC_DATA01'

and SEGMENT_TYPE='LOBSEGMENT')

ORDER BY B.BYTES DESC;