概述
今天主要總結一下Oracle表空間每日增長和歷史情況統計的一些腳本，僅供參考。
11g統計表空間的每日增長量
SELECT a.snap_id, c.tablespace_name ts_name, to_char(to_date(a.rtime, 'mm/dd/yyyy hh24:mi:ss'), 'yyyy-mm-dd hh24:mi') rtime, round(a.tablespace_size * c.block_size / 1024 / 1024, 2) ts_size_mb, round(a.tablespace_usedsize * c.block_size / 1024 / 1024, 2) ts_used_mb, round((a.tablespace_size - a.tablespace_usedsize) * c.block_size / 1024 / 1024, 2) ts_free_mb, round(a.tablespace_usedsize / a.tablespace_size * 100, 2) pct_used FROM dba_hist_tbspc_space_usage a, (SELECT tablespace_id, substr(rtime, 1, 10) rtime, max(snap_id) snap_id FROM dba_hist_tbspc_space_usage nb group by tablespace_id, substr(rtime, 1, 10)) b, dba_tablespaces c, v$tablespace d where a.snap_id = b.snap_id and a.tablespace_id = b.tablespace_id and a.tablespace_id = d.TS# and d.NAME = c.tablespace_name and to_date(a.rtime, 'mm/dd/yyyy hh24:mi:ss') >= sysdate - 30 order by a.tablespace_id, to_date(a.rtime, 'mm/dd/yyyy hh24:mi:ss') desc;
12c統計表空間的每日增長量
SELECT a.snap_id, a.con_id, e.name pdbname, c.tablespace_name ts_name, to_char(to_date(a.rtime, 'mm/dd/yyyy hh24:mi:ss'), 'yyyy-mm-dd hh24:mi') rtime, round(a.tablespace_size * c.block_size / 1024 / 1024, 2) ts_size_mb, round(a.tablespace_usedsize * c.block_size / 1024 / 1024, 2) ts_used_mb, round((a.tablespace_size - a.tablespace_usedsize) * c.block_size / 1024 / 1024, 2) ts_free_mb, round(a.tablespace_usedsize / a.tablespace_size * 100, 2) pct_used FROM cdb_hist_tbspc_space_usage a, (SELECT tablespace_id, nb.con_id, substr(rtime, 1, 10) rtime, max(snap_id) snap_id FROM dba_hist_tbspc_space_usage nb group by tablespace_id, nb.con_id,substr(rtime, 1, 10)) b, cdb_tablespaces c, v$tablespace d, V$CONTAINERS e where a.snap_id = b.snap_id and a.tablespace_id = b.tablespace_id and a.con_id=b.con_id and a.con_id=c.con_id and a.con_id=d.con_id and a.con_id=e.con_id and a.tablespace_id=d.TS# and d.NAME=c.tablespace_name and to_date(a.rtime, 'mm/dd/yyyy hh24:mi:ss') >=sysdate-30 order by a.CON_ID,a.tablespace_id,to_date(a.rtime, 'mm/dd/yyyy hh24:mi:ss') desc;
估算oracle 數據庫，數據庫對象歷史增長情況
--最近七天數據庫的增長情況，這個只是一個估算值。 select sum(space_used_total) / 1024 / 1024 / 1024 "last 7 days db increase - G" from dba_hist_seg_stat s, dba_hist_seg_stat_obj o, dba_hist_snapshot sn where s.obj# = o.obj# and sn.snap_id = s.snap_id and begin_interval_time > sysdate - 8 order by begin_interval_time
查看數據庫歷史增長情況
此處是通過計算數據庫所有表空間的歷史增長情況來計算數據庫歷史情況。
--不含undo和temp
with tmp as (
select rtime,sum(tablespace_usedsize_kb) tablespace_usedsize_kb, sum(tablespace_size_kb) tablespace_size_kb
from (select rtime, e.tablespace_id, (e.tablespace_usedsize)*(f.block_size)/1024 tablespace_usedsize_kb,
(e.tablespace_size)*(f.block_size)/1024 tablespace_size_kb from dba_hist_tbspc_space_usage e, dba_tablespaces f, v$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
列出相關段對象在 快照時間內的使用空間的歷史變化信息
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('01-OCT-2019', 'DD-MON-RRRR') and
to_timestamp('09-OCT-2019', '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;
