Oracle 常用脚本

Posted 2020-11-10 漠漠颜

ORACLE数据库存储空间使用情况查询

使用系统sys或者dba权限的账户创建视图如下:

1. 主要从数据库的表dba_data_files,dba_segments两张表中获取。
2. 默认数据库保存的是byte单位，转换关系如下: 
   1024bytes = 1kb 
   1024KB = 1M 
   1024M = 1G

   CREATE OR REPLACE VIEW V_GET_DISKSPACE AS
    SELECT A.TABLESPACE_NAME,
    A.USE "USED (MB)",
    (B.TOTAL-A.USE) "FREE (MB)",
    B.TOTAL "TOTAL (MB)",
    round((B.TOTAL-A.USE)/B.TOTAL,5)*100||‘%‘ "PER_FREE"
    FROM
    (
    select TABLESPACE_NAME,sum(bytes)/(1024*1024) as USE from dba_segments
    /*where tablespace_name NOT IN (‘USERS‘,‘SYSAUX‘,‘UNDOTBS1‘,‘SYSTEM‘,‘UNDOTBS2‘)*/
    GROUP BY TABLESPACE_NAME
    ) A ,
    (
    WITH TABLESPACE_TOTAL AS
    (
    SELECT tablespace_name,sum(MAXBYTES)/(1024*1024) TOTAL FROM DBA_DATA_FILES T
    WHERE /*T.TABLESPACE_NAME NOT IN (‘USERS‘,‘SYSAUX‘,‘UNDOTBS1‘,‘SYSTEM‘,‘UNDOTBS2‘)
    AND*/ T.AUTOEXTENSIBLE=‘YES‘ group by tablespace_name
    UNION ALL
    SELECT tablespace_name,sum(bytes) TOTAL FROM DBA_DATA_FILES T
    WHERE /*T.TABLESPACE_NAME NOT IN (‘USERS‘,‘SYSAUX‘,‘UNDOTBS1‘,‘SYSTEM‘,‘UNDOTBS2‘)
    AND*/ T.AUTOEXTENSIBLE=‘NO‘ group by tablespace_name
    )
    SELECT TABLESPACE_NAME,SUM(TOTAL) TOTAL FROM TABLESPACE_TOTAL GROUP BY TABLESPACE_NAME
    ) B
    WHERE A.TABLESPACE_NAME=B.TABLESPACE_NAME;

   LINUX服务器查询

   1. du -sch * 使用该命令查询当前目录下文件夹占用的空间的情况

   2. df -hl 查询磁盘剩余空间