查看数据库历史增长情况

此处是通过计算数据库所有表空间的历史增长情况来计算数据库历史情况。

--不含undo和temp

with tmp as

(select rtime,

                       sum(tablespace_usedsize_kb) tablespace_usedsize_kb,

                       sum(tablespace_size_kb) tablespace_size_kb

                  from (select rtime,

                               e.tablespace_id,

                               (e.tablespace_usedsize) * (f.block_size) / 1024 tablespace_usedsize_kb,

                               (e.tablespace_size) * (f.block_size) / 1024 tablespace_size_kb

                          from dba_hist_tbspc_space_usage e,

                               dba_tablespaces            f,

                               v$tablespace               g

                         where e.tablespace_id = g.TS#

                           and f.tablespace_name = g.NAME

                           and f.contents not in ('TEMPORARY','UNDO'))

                 group by rtime)

       select tmp.rtime,

              tablespace_usedsize_kb,

              tablespace_size_kb,

              (tablespace_usedsize_kb -

              LAG(tablespace_usedsize_kb, 1, NULL) OVER(ORDER BY tmp.rtime)) AS DIFF_KB

         from tmp,

              (select max(rtime) rtime

                 from tmp

                group by substr(rtime, 1, 10)) t2

        where t2.rtime = tmp.rtime;

--含undo和temp

with tmp as

(select min(rtime) rtime,

                       sum(tablespace_usedsize_kb) tablespace_usedsize_kb,

                       sum(tablespace_size_kb) tablespace_size_kb

                  from (select rtime,

                               e.tablespace_id,

                               (e.tablespace_usedsize) * (f.block_size) / 1024 tablespace_usedsize_kb,

                               (e.tablespace_size) * (f.block_size) / 1024 tablespace_size_kb

                          from dba_hist_tbspc_space_usage e,

                               dba_tablespaces            f,

                               v$tablespace               g

                         where e.tablespace_id = g.TS#

                           and f.tablespace_name = g.NAME)

                 group by rtime)

       select tmp.rtime,

              tablespace_usedsize_kb,

              tablespace_size_kb,

              (tablespace_usedsize_kb -

              LAG(tablespace_usedsize_kb, 1, NULL) OVER(ORDER BY tmp.rtime)) AS DIFF_KB

         from tmp,

              (select min(rtime) rtime

                 from tmp

                group by substr(rtime, 1, 10)) t2 where t2.rtime = tmp.rtime

##############################################################

SQL脚本:列出相关段对象在 快照时间内的使用空间的历史变化信息：

column owner format a16

column object_name format a36

column start_day format a11

column block_increase format 9999999999

select   obj.owner, obj.object_name,

         to_char(sn.BEGIN_INTERVAL_TIME,'RRRR-MON-DD') start_day,

         sum(a.db_block_changes_delta) block_increase

from     dba_hist_seg_stat a,

         dba_hist_snapshot sn,

         dba_objects obj

where    sn.snap_id = a.snap_id

and      obj.object_id = a.obj#

and      obj.owner not in ('SYS','SYSTEM')

and      end_interval_time between to_timestamp('17-FEB-2014','DD-MON-RRRR')

         and to_timestamp('25-FEB-2014','DD-MON-RRRR')

group by obj.owner, obj.object_name,

         to_char(sn.BEGIN_INTERVAL_TIME,'RRRR-MON-DD')

order by obj.owner, obj.object_name ;

select S.SNAP_ID,

                T.NAME,

                S.RTIME,

                (TABLESPACE_USEDSIZE - LAG(TABLESPACE_USEDSIZE, 1, NULL)

                 OVER(ORDER BY S.SNAP_ID)) AS DIFF

           from V$TABLESPACE T, DBA_HIST_TBSPC_SPACE_USAGE S

          where T.TS# = S.TABLESPACE_ID

            and T.name = 'TS_TEST01'

            and RTIME >= '02/18/20114 23:00:44'

------最近7天数据库增长情况

select  sum(space_used_total)/1024/1024/1024 "last 7 days db increase - G"

from

    dba_hist_seg_stat       s,

    dba_hist_seg_stat_obj   o,

    dba_hist_snapshot       sn

where

    s.obj# = o.obj#

and

    sn.snap_id = s.snap_id

and  begin_interval_time > sysdate-8

order by

    begin_interval_time

/