获得表空间增长量和增长率的脚本

对于涉及到数据库的人员,管理员等 都会关心一点 就是每天数据的增长多少,增长率是多少?

SELECT A.NAME, B.TABLESPACE_ID,B.DATETIME,B.USED_SIZE_MB,B.INC_MB,
CASE WHEN SUBSTR(INC_RATE,1,1)='.' THEN '0'||INC_RATE
WHEN SUBSTR(INC_RATE,1,2)='-.' THEN '-0'||SUBSTR(INC_RATE,2,LENGTH(INC_RATE))
ELSE INC_RATE
END AS INC_RATEX
FROM V$TABLESPACE A,
(
SELECT TABLESPACE_ID,DATETIME,
USED_SIZE_MB,
(DECODE(PREV_USE_MB,0,0,USED_SIZE_MB)-PREV_USE_MB) AS  INC_MB,
TO_CHAR(ROUND((DECODE(PREV_USE_MB,0,0,USED_SIZE_MB)-PREV_USE_MB)/DECODE(PREV_USE_MB,0,1,PREV_USE_MB)*100,2))||'%' AS INC_RATE
FROM
(
SELECT TABLESPACE_ID,
TRUNC(TO_DATE(RTIME, 'mm/dd/yyyy hh24:mi:ss')) DATETIME,
MAX(TABLESPACE_USEDSIZE * 8 / 1024) USED_SIZE_MB,
LAG(MAX(TABLESPACE_USEDSIZE * 8 / 1024),1,0) OVER(PARTITION BY TABLESPACE_ID ORDER BY TRUNC(TO_DATE(RTIME, 'mm/dd/yyyy hh24:mi:ss')) ) AS PREV_USE_MB
FROM DBA_HIST_TBSPC_SPACE_USAGE
WHERE TRUNC(TO_DATE(RTIME, 'mm/dd/yyyy hh24:mi:ss')) > TRUNC(SYSDATE - 30)
GROUP BY TABLESPACE_ID, TRUNC(TO_DATE(RTIME, 'mm/dd/yyyy hh24:mi:ss'))

)
) B
WHERE A.TS# = B.TABLESPACE_ID
ORDER BY B.TABLESPACE_ID,DATETIME;

效果如下:

前提是必须有这个视图存在,不过10G以上都有. 可惜这个视图存的数据才最近9天的.

create or replace view dba_hist_tbspc_space_usage asselect tb.snap_id, tb.dbid, tablespace_id, tablespace_size,tablespace_maxsize, tablespace_usedsize, rtimefrom (select distinct snap_id, dbidfrom WRM$_SNAPSHOT where status = 0) sn,WRH$_TABLESPACE_SPACE_USAGE tbwhere     sn.snap_id         = tb.snap_idand sn.dbid            = tb.dbid;comment on table DBA_HIST_TBSPC_SPACE_USAGE is 'Tablespace Usage Historical Statistics Information';

为了获得长时间的数据 建议大家亲自动手把视图(dba_hist_tbspc_space_usage)的数据保存在固定表中. 建个过程,跑个JOB.