今天天主要总结一下Oracle表空间每日增长和历史情况统计的一些脚本，仅供参考。
11g统计表空间的每日增长量
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$tablespace d
where a.snap_id = b.snap_id
and a.tablespace_id = b.tablespace_id
and a.tablespace_id = d.TS#
and d.NAME = c.tablespace_name
and to_date(a.rtime, 'mm/dd/yyyy hh24:mi:ss') >= sysdate - 30
order by a.tablespace_id, to_date(a.rtime, 'mm/dd/yyyy hh24:mi:ss') desc;
12c统计表空间的每日增长量
SELECT a.snap_id,
a.con_id,
e.name pdbname,
c.tablespace_name ts_name,
to_char(to_date(a.rtime, 'mm/dd/yyyy hh24:mi:ss'), 'yyyy-mm-dd hh24:mi') rtime,
round(a.tablespace_size * c.block_size / 1024 / 1024, 2) ts_size_mb,
round(a.tablespace_usedsize * c.block_size / 1024 / 1024, 2) ts_used_mb,
round((a.tablespace_size - a.tablespace_usedsize) * c.block_size / 1024 / 1024,
2) ts_free_mb,
round(a.tablespace_usedsize / a.tablespace_size * 100, 2) pct_used
FROM cdb_hist_tbspc_space_usage a,
(SELECT tablespace_id,
nb.con_id,
substr(rtime, 1, 10) rtime,
max(snap_id) snap_id
FROM dba_hist_tbspc_space_usage nb
group by tablespace_id, nb.con_id,substr(rtime, 1, 10)) b,
cdb_tablespaces c,
v$tablespace d,
V$CONTAINERS e
where a.snap_id = b.snap_id
and a.tablespace_id = b.tablespace_id
and a.con_id=b.con_id
and a.con_id=c.con_id
and a.con_id=d.con_id
and a.con_id=e.con_id
and a.tablespace_id=d.TS#
and d.NAME=c.tablespace_name
and to_date(a.rtime, 'mm/dd/yyyy hh24:mi:ss') >=sysdate-30
order by a.CON_ID,a.tablespace_id,to_date(a.rtime, 'mm/dd/yyyy hh24:mi:ss') desc;
估算oracle 数据库，数据库对象历史增长情况
最近七天数据库的增长情况，这个只是一个估算值。
select sum(space_used_total) / 1024 / 1024 / 1024 "last 7 days db increase - G"
from dba_hist_seg_stat s, dba_hist_seg_stat_obj o, dba_hist_snapshot sn
where s.obj# = o.obj#
and ssn.snap_id = s.snap_id
and begin_interval_time > sysdate - 8
order by begin_interval_time
查看数据库历史增长情况
此处是通过计算数据库所有表空间的历史增长情况来计算数据库历史情况。
不含undo和temp：
with tmp as (
select rtime,sum(tablespace_usedsize_kb) tablespace_usedsize_kb, sum(tablespace_size_kb) tablespace_size_kb
from (select rtime, e.tablespace_id, (e.tablespace_usedsize)*(f.block_size)/1024 tablespace_usedsize_kb,
(e.tablespace_size)*(f.block_size)/1024 tablespace_size_kb from dba_hist_tbspc_space_usage e, dba_tablespaces f, v$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
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
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;
