回收站及flashback drop实验部分(4)
作者：互联网
等待十几分钟后查看数据：
SYS@oralhr> select * from xb_split_job_lhr;
STARTROWNUM ENDROWNUM FLAG
----------- ---------- ----------
1 40000
40001 80000
80001 120000
120001 159915
SYS@oralhr>
SYS@oralhr> col owner for a5
SYS@oralhr> col CPU_USED for a18
SYS@oralhr> col ELAPSED_TIME for a18
SYS@oralhr> select OWNER,JOB_NAME,CPU_USED,ELAPSED_TIME,RUNNING_INSTANCE from dba_scheduler_running_jobs;
OWNER JOB_NAME CPU_USED ELAPSED_TIME RUNNING_INSTANCE
----- ------------------------------ ------------------ ------------------ ----------------
SYS JOB_SUBJOB_SPLIT_LHR1 +000 00:10:18.36 +000 00:19:15.29 1
SYS JOB_SUBJOB_SPLIT_LHR2 +000 00:10:14.71 +000 00:19:15.07 1
SYS JOB_SUBJOB_SPLIT_LHR3 +000 00:10:12.77 +000 00:19:14.95 1
SYS JOB_SUBJOB_SPLIT_LHR4 +000 00:10:14.70 +000 00:19:14.78 1
SYS@oralhr>
若系统CPU强劲的话，该SQL会很快完成的，查询dba_scheduler_running_jobs视图将无数据表示job已完成。
4 实验总结
1、11.2.0.4中若回收站对象过多的情况下，dba_free_space查询过慢的问题已经解决了
2、实验二的脚本具有通用性，很多操作可以同时执行的时候我们可以修改该程序
第二章 实验中用到的SQL总结
实验一：
dbca -silent -createDatabase -templateName General_Purpose.dbc -responseFile NO_VALUE \
-gdbname oralhr -sid oralhr \
-sysPassword oracle -systemPassword lhr \
-datafileDestination 'DATA2/' -recoveryAreaDestination 'DATA2/' \
-redoLogFileSize 50 \
-storageType ASM -asmsnmpPassword lhr -diskGroupName 'DATA2' \
-characterset AL32UTF8 -nationalCharacterSet AL16UTF16 \
-sampleSchema false \
-automaticMemoryManagement true -totalMemory 2048 \
-databaseType OLTP \
-emConfiguration NONE
show parameter recy
create table tb_20160627_lhr as select * from dual;
drop table tb_20160627_lhr;
select * from dba_recyclebin;
drop table tb_20160627_lhr;
drop table tb_20160627_lhr;
select * from dba_recyclebin;
实验二：
begin
for cur in 1 .. 100000 loop
execute immediate 'create table tb_recyclebin_' || cur ||
' nologging tablespace users as select * from dual';
execute immediate 'create index idx_recyclebin_' || cur ||
' on tb_recyclebin_' || cur ||' (dummy) nologging tablespace users';
end loop;
end;
/
begin
for cur in 1 .. 100000 loop
execute immediate 'create table tb_recyclebin_lhr_' || cur ||
' nologging tablespace users as select * from dual';
execute immediate 'create index idx_recyclebin_lhr_' || cur ||
' on tb_recyclebin_lhr_' || cur ||' (dummy) nologging tablespace users';
end loop;
end;
/
begin
for cur in 1 .. 100000 loop
execute immediate 'create table tb_recyclebin_lhr1_' || cur ||
' nologging tablespace users as select * from dual';
execute immediate 'create index idx_recyclebin_lhr1_' || cur ||
' on tb_recyclebin_lhr1_' || cur ||' (dummy) nologging tablespace users';
end loop;
end;
begin
for cur in (SELECT d.table_name
FROM dba_tables d
WHERE d.table_name like 'TB_RECYCLEBIN%') loop
execute immediate 'drop table ' || cur.table_name;
end loop;
end;
/
CREATE TABLE XB_recyclebin_LHR NOLOGGING AS
SELECT ROWNUM RN, 'PURGE ' || A.type || ' ' || A.owner || '."' || A.object_name || '"' EXEC_SQL
FROM dba_recyclebin A
where a.type = 'TABLE';
CREATE INDEX IDX_recyclebin_rn on XB_recyclebin_LHR(rn) NOLOGGING ;
create table XB_SPLIT_JOB_LHR
(
startrownum NUMBER(18),
endrownum NUMBER(18),
flag NUMBER(1)
);
col CPU_USED for a18
col ELAPSED_TIME for a18
select OWNER,JOB_NAME,CPU_USED,ELAPSED_TIME,RUNNING_INSTANCE from dba_scheduler_running_jobs;
标签：cur,drop,oralhr,lhr,recyclebin,table,flashback,tb,回收站 来源： https://blog.51cto.com/lhrbest/2708060