Oracle表空間增長率監(jiān)控腳本

在數(shù)據(jù)主機上建立tbs_usage表反映數(shù)據(jù)中數(shù)據(jù)文件的使用量，其中tbs_timeid為該表主鍵，作為唯一標(biāo)識當(dāng)日數(shù)據(jù)庫表空間的id構(gòu)造tbs

由于最近業(yè)務(wù)量大增大，，導(dǎo)致表空間增長速度變得很快，客戶也開始擔(dān)憂表空間的增長率。因此也提出了每日監(jiān)控表空間增長量的需求。筆者根據(jù)客戶的需求，在這里寫了個簡單的腳本，主體思想是通過，將每日查詢到的表空間增長率插入到自己建的表中，然后通過構(gòu)造查詢語句，反映出表空間的增長率，具體實施不走如下

在數(shù)據(jù)主機上建立tbs_usage表反映數(shù)據(jù)中數(shù)據(jù)文件的使用量，其中tbs_timeid為該表主鍵，作為唯一標(biāo)識當(dāng)日數(shù)據(jù)庫表空間的id構(gòu)造tbs_timeid為df.tablespace_name||"-"||(sysdate)
1、pansky用戶作為日常管理，目前主要用戶表空間數(shù)據(jù)量的監(jiān)控
SQL> create user pansky identified by pansky default tablespace users quota 50M on users;
User created.

SQL> grant create session to pansky;
Grant succeeded.

SQL> grant create table to pansky;
Grant succeeded.

SQL> grant select on dba_data_files to pansky;
Grant succeeded.

SQL> grant select on dba_free_space to pansky;
Grant succeeded.

2、以pansky用戶創(chuàng)建tbs_usage表
create table tbs_usage
as
SELECT df.tablespace_name||"-"||(sysdate) tbs_timeid ,df.tablespace_name||"-"||(sysdate-1) ys_tbs_timeid,df.tablespace_name,
COUNT(*) datafile_count,
ROUND(SUM(df.BYTES) / 1048576) size_mb,
ROUND(SUM(free.BYTES) / 1048576, 2) free_mb,
ROUND(SUM(df.BYTES) / 1048576 - SUM(free.BYTES) / 1048576, 2) used_mb,
ROUND(MAX(free.maxbytes) / 1048576, 2) maxfree,
100 - ROUND(100.0 * SUM(free.BYTES) / SUM(df.BYTES), 2) pct_used,
ROUND(100.0 * SUM(free.BYTES) / SUM(df.BYTES), 2) pct_free,(sysdate) time
FROM dba_data_files df,
(SELECT tablespace_name,
file_id,
SUM(BYTES) BYTES,
MAX(BYTES) maxbytes
FROM dba_free_space
GROUP BY tablespace_name, file_id) free
WHERE df.tablespace_name = free.tablespace_name(+)
AND df.file_id = free.file_id(+)
GROUP BY df.tablespace_name
ORDER BY 8;

3、創(chuàng)建主鍵約束
alter table tbs_usage add constraint tbs_usage_pk_tbs_timeid primary key(tbs_timeid);

4、在crontab中運行每日7點30分更新數(shù)據(jù)庫表空間信息的腳本update_tbs_info.sh
30 07 * * * /Oracle10g/update_tbs_info.sh
其中 update_tbs_info.sh腳本內(nèi)容如下
#!/bin/ksh
#FileName: update_tbs_info.sh
#CreateDate:2011-10-09
#Discription:take the basic information to insert into the table tbs_usage
PATH=/usr/kerberos/bin:/usr/local/bin:/usr/bin:/bin:/usr/X11R6/bin:/home/oracle/bin:/home/ oracle/bin:/oracle10g/app/oracle/product/10.2.0/db_1/bin;export PATH

ORACLE_SID=zgscdb1;export ORACLE_SID
ORACLE_BASE=/oracle10g/app/oracle;export ORACLE_BASE
ORACLE_HOME=/oracle10g/app/oracle/product/10.2.0/db_1;export ORACLE_HOME
PATH=$ORACLE_HOME/bin:$PATH;export PATH

date >> /oracle10g/log/update_tbs_info.log
sqlplus pansky/pansky <> /oracle10g/log/update_tbs_info.log 2>&1
insert into pansky.tbs_usage
SELECT df.tablespace_name||"-"||(sysdate) tb_timeid,df.tablespace_name||"-"||(sysdate-1) y s_tb_timeid,df.tablespace_name,
COUNT(*) datafile_count,
ROUND(SUM(df.BYTES) / 1048576) size_mb,
ROUND(SUM(free.BYTES) / 1048576, 2) free_mb,
ROUND(SUM(df.BYTES) / 1048576 - SUM(free.BYTES) / 1048576, 2) used_mb,
ROUND(MAX(free.maxbytes) / 1048576, 2) maxfree,
100 - ROUND(100.0 * SUM(free.BYTES) / SUM(df.BYTES), 2) pct_used,
ROUND(100.0 * SUM(free.BYTES) / SUM(df.BYTES), 2) pct_free,sysdate time
FROM dba_data_files df,
(SELECT tablespace_name,
file_id,
SUM(BYTES) BYTES,
MAX(BYTES) maxbytes
FROM dba_free_space
GROUP BY tablespace_name, file_id) free
WHERE df.tablespace_name = free.tablespace_name(+)
AND df.file_id = free.file_id(+)
GROUP BY df.tablespace_name
ORDER BY 8;
commit;
EOF
echo >> /oracle10g/log/update_tbs_info.log

4、查詢數(shù)據(jù)庫表空間使用情況的SQL,下例可查詢出2011-10-08的表空間使用情況以及相較于2011-10-09日的表空間增長量(MB),并根據(jù)pct_used降序排列。
Set linesize 150
Col tablespace_name for a22
select a.tablespace_name,a.datafile_count,a.size_mb,a.free_mb,a.used_mb,a.maxfree,a.pct_used,a.pct_free,to_char(a.time,"yyyy-mm-dd hh24:mi") time,(a.USED_MB-b.USED_MB) increase_mb from pansky.tbs_usage a,pansky.tbs_usage b
where a.YS_TBs_TIMEid= b.TBs_TIMEid
and a.time>=to_date("2011-11-02","yyyy-mm-dd") and a.time< to_date("2011-11-03","yyyy-mm-dd") order by pct_used desc;

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