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数据库的空间使用情况是好多单位需要关注的，当 Oracle 数据库服务器比较多的时候，手动统计就显得费时费力了，下面编写了 Python 脚本批量统计 Oracle 的表空间总使用量
#! /usr/bin/python
# -*- coding: UTF-8 -*-
import cx_Oracle as oracle
import time
def nowdate():
#获取当前时间
nowdate=time.strftime(“%Y%m%d”,time.localtime())
return nowdate
def get_connect(userinfo):
#获取 Oracle 数据库的登陆信息
try:
conn=oracle.connect(userinfo)
cursor=conn.cursor()
except Exception as error:
print(error)
else:
return cursor
def get_sql(filename):
#获取统计 Oracle 数据库的 sql 语句
filename=filename
try:
with open(filename) as file:
sql=file.read()
except FileNotFoundError:
error=”Sorry,the file ” + filename + ” does not exist.”
print(error)
else:
return sql
def get_data(sql):
#获取 Oracle 数据库的表空间使用情况
cursor.execute(sql)
data = cursor.fetchall()
return data
def get_instance_name():
#获取 Oracle 数据库实例名字
cursor.execute(‘select instance_name from v$instance’)
data = cursor.fetchall()
cursor.close()
# conn.close()
return data
def put_data(instance_name,instance_data,nowtime):
#将得到的数据 insert 到特定的实例的表中, 这里选择的是 202 的实例
host = “10.29.29.1”
port = “1521”
sid = “test209”
dsn = oracle.makedsn(host, port, sid)
conn =oracle.connect(“liuwenhe”, “liuwenhe”, dsn)
cursor = conn.cursor()
insert_sql=”insert into liuwenhe.tongji values (‘”+instance_name+”‘,'”+str(instance_data)+”‘,'”+nowtime+”‘)”
cursor.execute(insert_sql)
cursor.close()
conn.commit()
conn.close()
if __name__==’__main__’:
try:
userinfofile=’userinfo.txt’
with open(userinfofile) as file:
userinfos=file.readlines()
for userinfo in userinfos:
cursor=get_connect(userinfo)
instance_name1=get_instance_name()
instance_name=instance_name1[0][0]
sql=get_sql(‘select’)
cursor=get_connect(userinfo)
instance_data1=get_data(sql)
instance_data=instance_data1[0][0]
nowtime=nowdate()
put_data(instance_name,instance_data,nowtime)
except Exception as e:
print (e)
其中统计 Oracle 表空间的的 sql 为（不包含 undo 表空间和临时表空间）：
select
sum(round(used_gb))used_M
from (select a.tablespace_name tablespace_name,
round((a.bytes_alloc – nvl(b.bytes_free, 0)) / power(2, 30),
2) used_gb,
round(a.maxbytes / power(2, 30), 2) max_gb
from (select f.tablespace_name,
sum(f.bytes) bytes_alloc,
sum(decode(f.autoextensible,
‘YES’,
f.maxbytes,
‘NO’,
f.bytes)) maxbytes
from dba_data_files f
group by tablespace_name) a,
(select f.tablespace_name, sum(f.bytes) bytes_free
from dba_free_space f
group by tablespace_name) b
where a.tablespace_name = b.tablespace_name(+) and a.tablespace_name!=’UNDOTBS1′ and a.tablespace_name!=’UNDOTBS’ );
