数据库表空间资源使用情况查询
数据库表空间资源使用情况查询
mysql 查看表占用空间大小
1、切换数据库
use information_schema;
2、查看数据库使用大小
select concat(round(sum(data_length/1024/1024),2),'MB') as data from tables where table_schema='zzz' ;
3、查看表使用大小
select concat(round(sum(data_length/1024/1024),2),'MB') as data from tables where table_schema='zzz' and table_name='terminal_statistics_handle';
oracle 查看表空间的大小及使用情况
1、查看表空间的名称及大小
SELECT t.tablespace_name, round(SUM(bytes / (1024 * 1024)), 0) ts_size
FROM dba_tablespaces t, dba_data_files d
WHERE t.tablespace_name = d.tablespace_name
GROUP BY t.tablespace_name;
2、查看表空间物理文件的名称及大小
SELECT tablespace_name,
file_id,
file_name,
round(bytes / (1024 * 1024), 0) total_space
FROM dba_data_files
ORDER BY tablespace_name;
3、查看回滚段名称及大小
SELECT segment_name,
tablespace_name,
r.status,
(initial_extent / 1024) initialextent,
(next_extent / 1024) nextextent,
max_extents,
v.curext curextent
FROM dba_rollback_segs r, v$rollstat v
WHERE r.segment_id = v.usn(+)
ORDER BY segment_name;
4、查看控制文件
SELECT NAME FROM v$controlfile;
5、查看日志文件
SELECT MEMBER FROM v$logfile;
6、查看表空间的使用情况
SELECT SUM(bytes) / (1024 * 1024) AS free_space, tablespace_name
FROM dba_free_space
GROUP BY tablespace_name;
SELECT a.tablespace_name,
a.bytes total,
b.bytes used,
c.bytes free,
(b.bytes * 100) / a.bytes "% USED ",
(c.bytes * 100) / a.bytes "% FREE "
FROM sys.smtsavaila,sys.smtsavaila,sys.smts_used b, sys.sm$ts_free c
WHERE a.tablespace_name = b.tablespace_name
AND a.tablespace_name = c.tablespace_name;
7、查看数据库库对象
SELECT owner, object_type, status, COUNT(*) count#
FROM all_objects
GROUP BY owner, object_type, status;
8、查看数据库的版本
SELECT version
FROM product_component_version
WHERE substr(product, 1, 6) = 'Oracle';
9、查看数据库的创建日期和归档方式
SELECT created, log_mode, log_mode FROM v$database;
表空间使用情况
1G=1024MB
1M=1024KB
1K=1024Bytes
1M=11048576Bytes
1G=1024*11048576Bytes=11313741824Bytes
SELECT a.tablespace_name "表空间名",
total "表空间大小",
free "表空间剩余大小",
(total - free) "表空间使用大小",
total / (1024 * 1024 * 1024) "表空间大小(G)",
free / (1024 * 1024 * 1024) "表空间剩余大小(G)",
(total - free) / (1024 * 1024 * 1024) "表空间使用大小(G)",
round((total - free) / total, 4) * 100 "使用率 %"
FROM (SELECT tablespace_name, SUM(bytes) free
FROM dba_free_space
GROUP BY tablespace_name) a,
(SELECT tablespace_name, SUM(bytes) total
FROM dba_data_files
GROUP BY tablespace_name) b
WHERE a.tablespace_name = b.tablespace_name
Oracle 临时表资源
1、临时表空间，请查询DBA_TEMP_FREE_SPACE
SELECT TABLESPACE_NAME, FREE_SPACE/1024/1024 AS "FREE SPACE(M)"
FROM DBA_TEMP_FREE_SPACE
WHERE TABLESPACE_NAME = '&tablespace_name';
2、临时表空间，请查询DBA_TEMP_FILES
SELECT TABLESPACE_NAME, FILE_ID, FILE_NAME, BYTES/1024/1024 AS "SPACE(M)"
FROM DBA_TEMP_FILES
WHERE TABLESPACE_NAME = '&tablespace_name';
3、为空间不足的表空间增加数据文件 如不需要请勿执行
ALTER TABLESPACE &tablespace_name ADD DATAFILE '&datafile_name' SIZE 2G;
增加物理文件，扩充空间
alter tablespace system add datafile 'D:ORCL\SYSTEM03.DBF' size 10G autoextend off;
4、注：如果要为临时表空间扩容，使用下面的语句 如不需要请勿执行
ALTER TABLESPACE &tablespace_name ADD TEMPFILE '&datafile_name' SIZE 2G;
版权声明：本文为博客园博主「Spear_J」的原创文章，编写不易，转载请附上原文出处链接及本声明。
https://www.cnblogs.com/lmh15054109/articles/16250099.html
