Python批量统计Oracle数据库的空间使用量

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'  );

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