一，設(shè)計背景
由于所在公司ORACLE數(shù)據(jù)庫較多，傳統(tǒng)人工監(jiān)控表空間的方式較耗時，且無法記錄歷史表空間數(shù)據(jù)，無法判斷每日表空間增長量，在沒有g(shù)ridcontrol/cloudcontrol軟件的情況下，筆者設(shè)計如下表空間監(jiān)控方案，大家也可以根據(jù)自己的實際情況對下面的方案進行修改。
二，設(shè)計思路
通過dblink將來查詢到的表空間數(shù)據(jù)集中匯總到一張表里通過crontab跑定時任務(wù)從各臺服務(wù)器獲取表空間使用情況信息。
三，具體實施步驟
1.所在oracle數(shù)據(jù)庫ip地址信息（下面為舉例說明具體情況要根據(jù)所在環(huán)境設(shè)置）
2.在tbsmonitor主機上創(chuàng)建tbsmonitor表空間
復(fù)制代碼 代碼如下:
create tablespace tbsmonitor datafile '/opt/u01/app/oradata/tbsmonitor/tsmonitor.dbf' size 50M autoextend on;
3.在tbsmonitor和database1/database2/database3上建立tbsmonitor用戶用來做表空間監(jiān)控。
create user tsmonitor identified by I11m8cb default tablespace tsmonitor;
4.為了tbsmonitor用戶賦權(quán)用來查找表空間使用情況。
grant resource to tbsmonitor;
grant create session to tbsmonitor;
grant create table to tbsmonitor;
grant select on dba_data_files to tbsmonitor;
grant select on dba_free_space to tbsmonitor;
5.在tbsmonitor上建立database1/ database2/ database3的tnsnames.ora連接，在tnsnames.ora文件中加入
DATABASE1 =
(DESCRIPTION=
(ADDRESS=(PROTOCOL=TCP)(HOST=10.1.21.1)(PORT=1521))
(CONNECT_DATA=(SID= database1)))
DATABASE2 =
(DESCRIPTION=
(ADDRESS=(PROTOCOL=TCP)(HOST=10.1.21.2)(PORT=1521))
(CONNECT_DATA=(SID= database2)))
DATABASE3 =
(DESCRIPTION=
(ADDRESS=(PROTOCOL=TCP)(HOST=10.1.21.3)(PORT=1521))
(CONNECT_DATA=(SID= database3)))
6.修改/etc/hosts文件，如果有dns服務(wù)器的話可以略過
10.1.21.2 database1
10.1.21.3 database2
10.1.21.4 database3
7.在tbsmonitor主機設(shè)置dblink，這樣就能通過dblink從被監(jiān)控服務(wù)器遠程抽取表空間信息。
create database link TO_DATABASE1
connect to TSMONITOR identified by I11m08cb
using 'DATABASE1';
create database link TO_DATABASE2
connect to TSMONITOR identified by I11m08cb
using 'DATABASE2';
create database link TO_DATABASE3
connect to TSMONITOR identified by I11m08cb
using 'DATABASE3';
8.建立tbsmonitor表，表空間統(tǒng)計數(shù)據(jù)將插入這張表。
create table tbsmonitor.tbsmonitor
(
ipaddress VARCHAR2(200),
instancename VARCHAR2(200),
tablespace_name VARCHAR2(200),
datafile_count NUMBER,
size_mb NUMBER,
free_mb NUMBER,
used_mb NUMBER,
maxfree NUMBER,
pct_used NUMBER,
pct_free NUMBER,
time DATE
) tablespace tbsmonitor;
9. 在crontab中運行每日0點1分更新數(shù)據(jù)庫表空間信息的腳本tbsmonitor.sh（我根據(jù)業(yè)務(wù)需要每日統(tǒng)計一次，大家也可以通過業(yè)務(wù)要求修改統(tǒng)計頻率）
1 0 * * * /opt/u01/app/oracle/tbsmonitor.sh
#!/bin/bash
#FileName: tbsmonitor.sh
#CreateDate:2016-01-1
#version:1.0
#Discription:take the basic information to insert into the table tbs_usage
# Author:FUZHOU HOT
#Email:15980219172@139.com
ORACLE_SID= tbsmonitor
ORACLE_BASE=/opt/u01/app
ORACLE_HOME=/opt/u01/app/oracle
PATH=$ORACLE_HOME/bin:$PATH;export PATH
export ORACLE_SID ORACLE_BASE ORACLE_HOME
date>>/opt/u01/app/oracle/tbsmonitor.sh
sqlplus sys/I11m08cb as sysdba EOF >> /opt/u01/app/oracle/tbsmonitor.log 2>1
@/opt/u01/app/oracle/tbsmonitor/ tbsmonitor.sql;
@/opt/u01/app/oracle/tbsmonitor/database1.sql;
@/opt/u01/app/oracle/tbsmonitor/database2.sql;
@/opt/u01/app/oracle/tbsmonitor/database3.sql;
EOF
echo >> /opt/u01/app/oracle/ tbsmonitor.log
11.創(chuàng)建插入腳本（拿database1舉例，以此類推）
/opt/u01/app/oracle/tbsmonitor/database1.sql; /opt/u01/app/oracle/tbsmonitor/database2.sql;
/opt/u01/app/oracle/tbsmonitor/database3.sql;
/opt/u01/app/oracle/tbsmonitor/ tbsmonitor.sql;
Sql腳本如下
insert into tsmonitor.tbsmonitor SELECT utl_inaddr.get_host_address('DATABASE1') ipaddress,
(select instance_name from v$instance) instancename,
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@TO_DATABASE1 df,
(SELECT tablespace_name,
file_id,
SUM(BYTES) BYTES,
MAX(BYTES) maxbytes
FROM dba_free_space@TO_DATABASE1
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 6;
12.查看表空間使用占比可以使用如下語句(如果要查看某臺機器可以帶上條件where ipaddress='xxxx' and instance='xxxxx' and to_char(time,'yyyy-mm-dd')='xxxx-xx-xx')
SELECT IPADDRESS ,
Instancename,
tablespace_name,
datafile_count,
size_mb "表空間大小(M)",
used_mb "已使用空間(M)",
TO_CHAR(ROUND((used_mb) / size_mb * 100,
2),
'990.99') "使用比",
free_mb "空閑空間(M)"
FROM tbsmonitor. tbsmonitor order by "使用比" desc
13.查看每日增量可以使用如下腳本。（下面顯示的是4-8日10.1.21.2表空間增長的情況）
select a.tablespace_name,(b.used_mb-a.used_mb) increase,a.ipaddress from
(select * from tsmonitor.tbs_usage where to_char(time,'yyyy-mm-dd')='2016-01-04') a,
(select * from tsmonitor.tbs_usage where to_char(time,'yyyy-mm-dd')='2016-01-08') b
where a.tablespace_name=b.tablespace_name and a.IPADDRESS=b.IPADDRESS order by increase desc
select * from tbsmonitor. tbsmonitor where ipaddress='10.1.21.2' and to_char(time,'yyyy-mm-dd')='2016-01-08'
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