本篇內(nèi)容主要講解“怎么查詢MySQL和oracle數(shù)據(jù)庫(kù)空間”，感興趣的朋友不妨來看看。本文介紹的方法操作簡(jiǎn)單快捷，實(shí)用性強(qiáng)。下面就讓小編來帶大家學(xué)習(xí)“怎么查詢mysql和oracle數(shù)據(jù)庫(kù)空間”吧!
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-- 查看所有數(shù)據(jù)庫(kù)容量大小 SELECT table_schema AS '數(shù)據(jù)庫(kù)', sum( table_rows ) AS '記錄數(shù)', sum( TRUNCATE ( data_length / 1024 / 1024, 2 )) AS '數(shù)據(jù)容量(MB)', sum( TRUNCATE ( index_length / 1024 / 1024, 2 )) AS '索引容量(MB)' FROM information_schema.TABLES GROUP BY table_schema ORDER BY sum( data_length ) DESC, sum( index_length ) DESC;
SELECT table_schema AS '數(shù)據(jù)庫(kù)', table_name AS '表名', table_rows AS '記錄數(shù)', TRUNCATE ( data_length / 1024 / 1024, 2 ) AS '數(shù)據(jù)容量(MB)', TRUNCATE ( index_length / 1024 / 1024, 2 ) AS '索引容量(MB)' FROM information_schema.TABLES ORDER BY data_length DESC, index_length DESC;
SELECT table_schema AS '數(shù)據(jù)庫(kù)', sum( table_rows ) AS '記錄數(shù)', sum( TRUNCATE ( data_length / 1024 / 1024, 2 )) AS '數(shù)據(jù)容量(MB)', sum( TRUNCATE ( index_length / 1024 / 1024, 2 )) AS '索引容量(MB)' FROM information_schema.TABLES WHERE table_schema = '數(shù)據(jù)庫(kù)名';
SELECT table_schema AS '數(shù)據(jù)庫(kù)', table_name AS '表名', table_rows AS '記錄數(shù)', TRUNCATE ( data_length / 1024 / 1024, 2 ) AS '數(shù)據(jù)容量(MB)', TRUNCATE ( index_length / 1024 / 1024, 2 ) AS '索引容量(MB)' FROM information_schema.TABLES WHERE table_schema = '數(shù)據(jù)庫(kù)名' ORDER BY data_length DESC, index_length DESC;
SHOW TABLE STATUS;
-- 不需要DBA權(quán)限 SELECT SEGMENT_NAME TABLENAME,(BYTES/1024/1024) MB ,RANK() OVER (PARTITION BY NULL ORDER BY BYTES DESC) RANK_ID //根據(jù)表大小進(jìn)行排序 FROM USER_SEGMENTS WHERE SEGMENT_TYPE='TABLE' -- 需要DBA權(quán)限,一般情況下很少會(huì)給這么高的權(quán)限,可以說這個(gè)權(quán)限基本沒有,所以一般工作中不是DBA的人不會(huì)常用到這個(gè)命令 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;
SELECT a.tablespace_name "表空間名稱", total / (1024 * 1024) "表空間大小(M)", free / (1024 * 1024) "表空間剩余大小(M)", (total - free) / (1024 * 1024 ) "表空間使用大小(M)", total / (1024 * 1024 * 1024) "表空間大小(G)", free / (1024 * 1024 * 1024) "表空間剩余大小(G)", (total - free) / (1024 * 1024 * 1024) "表空間使用大小(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
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;
SELECT MEMBER FROM v$logfile;
SELECT owner, object_type, status, COUNT(*) count# FROM all_objects GROUP BY owner, object_type, status;
SELECT version FROM product_component_version WHERE substr(product, 1, 6) = 'Oracle';
SELECT created, log_mode, log_mode FROM v$database;
SELECT T.TABLESPACE_NAME,D.FILE_NAME, D.AUTOEXTENSIBLE,D.BYTES,D.MAXBYTES,D.STATUS FROM DBA_TABLESPACES T,DBA_DATA_FILES D WHERE T.TABLESPACE_NAME =D.TABLESPACE_NAME ORDER BY TABLESPACE_NAME,FILE_NAME;
--查看數(shù)據(jù)庫(kù)表空間文件 select * from dba_data_files;
--查看所有表空間的總?cè)萘? select dba.TABLESPACE_NAME, sum(bytes)/1024/1024 as MB from dba_data_files dba group by dba.TABLESPACE_NAME;
--查看數(shù)據(jù)庫(kù)表空間使用率 select total.tablespace_name,round(total.MB, 2) as Total_MB,round(total.MB - free.MB, 2) as Used_MB,round((1-free.MB / total.MB)* 100, 2) || '%' as Used_Pct from ( select tablespace_name, sum(bytes) /1024/1024 as MB from dba_free_space group by tablespace_name) free, (select tablespace_name, sum(bytes) / 1024 / 1024 as MB from dba_data_files group by tablespace_name) total where free.tablespace_name = total.tablespace_name order by used_pct desc;
--查看表空間總大小、使用率、剩余空間 select a.tablespace_name, total, free, total-free as used, substr(free/total * 100, 1, 5) as "FREE%", substr((total - free)/total * 100, 1, 5) as "USED%" from (select tablespace_name, sum(bytes)/1024/1024 as total from dba_data_files group by tablespace_name) a, (select tablespace_name, sum(bytes)/1024/1024 as free from dba_free_space group by tablespace_name) b where a.tablespace_name = b.tablespace_name order by a.tablespace_name
--查看表空間使用率(包含臨時(shí)表空間) select * from ( Select a.tablespace_name, (a.bytes- b.bytes) "表空間使用大小(BYTE)", a.bytes/(1024*1024*1024) "表空間大小(GB)", b.bytes/(1024*1024*1024) "表空間剩余大小(GB)", (a.bytes- b.bytes)/(1024*1024*1024) "表空間使用大小(GB)", to_char((1 - b.bytes/a.bytes)*100,'99.99999') || '%' "使用率" from (select tablespace_name, sum(bytes) bytes from dba_data_files group by tablespace_name) a, (select tablespace_name, sum(bytes) bytes from dba_free_space group by tablespace_name) b where a.tablespace_name = b.tablespace_name union all select c.tablespace_name, d.bytes_used "表空間使用大小(BYTE)", c.bytes/(1024*1024*1024) "表空間大小(GB)", (c.bytes-d.bytes_used)/(1024*1024*1024) "表空間剩余大小(GB)", d.bytes_used/(1024*1024*1024) "表空間使用大小(GB)", to_char(d.bytes_used*100/c.bytes,'99.99999') || '%' "使用率" from (select tablespace_name,sum(bytes) bytes from dba_temp_files group by tablespace_name) c, (select tablespace_name,sum(bytes_cached) bytes_used from v$temp_extent_pool group by tablespace_name) d where c.tablespace_name = d.tablespace_name ) order by tablespace_name
--查看具體表的占用空間大小 select * from ( select t.tablespace_name,t.owner, t.segment_name, t.segment_type, sum(t.bytes / 1024 / 1024) mb from dba_segments t where t.segment_type='TABLE' group by t.tablespace_name,t.OWNER, t.segment_name, t.segment_type ) t order by t.mb desc
alter database datafile ‘...\system_01.dbf' autoextend on; alter database datafile ‘...\system_01.dbf' resize 1024M;
alter tablespace SYSTEM add datafile '/****' size 1000m autoextend on next 100m;
0RA-03217: 變更TEMPORARY TABLESPACE 無效的選項(xiàng)
解決方法: datafile改為tempfile
alter tablespace TEMP01 add tempfile'/****' size 1000m autoextend on next 100m maxsize 10000m
針對(duì)temp臨時(shí)表空間使用率爆滿問題
臨時(shí)表空間主要用途是在數(shù)據(jù)庫(kù)進(jìn)行排序運(yùn)算、管理索引、訪問視圖等操作時(shí)提供臨時(shí)的運(yùn)算空間，當(dāng)運(yùn)算完成之后系統(tǒng)會(huì)自動(dòng)清理，但有些時(shí)候我們會(huì)遇到臨時(shí)段沒有被釋放，TEMP表空間幾乎滿使用率情況；
引起臨時(shí)表空間增大主要使用在以下幾種情況：
1、order by or group by (disc sort占主要部分)；
2、索引的創(chuàng)建和重創(chuàng)建；
3、distinct操作；
4、union & intersect & minus sort-merge joins；
5、Analyze 操作；
6、有些異常也會(huì)引起TEMP的暴漲。
解決方法一：用上述方法給temp增加表空間文件
解決方法二：在服務(wù)器資源空間有限的情況下，重新建立新的臨時(shí)表空間替換當(dāng)前的表空間
--1.查看當(dāng)前的數(shù)據(jù)庫(kù)默認(rèn)表空間： select * from database_properties where property_name='DEFAULT_TEMP_TABLESPACE'; --2.創(chuàng)建新的臨時(shí)表空間 create temporary tablespace TEMP01 tempfile '/home/temp01.dbf' size 31G; --3.更改默認(rèn)臨時(shí)表空間 alter database default temporary tablespace TEMP01; --4.刪除原來的臨時(shí)表空間 drop tablespace TEMP02 including contents and datafiles; --如果刪除原來臨時(shí)表空間報(bào)錯(cuò)ORA-60100：由于排序段，已阻止刪除表空間... --（說明有語句正在使用原來的臨時(shí)表空間，需要將其kill掉再刪除，此語句多為排序的語句） --查詢語句 Select se.username,se.sid,se.serial#,su.extents,su.blocks*to_number(rtrim(p.value))as Space, tablespace,segtype,sql_text from v$sort_usage su,v$parameter p,v$session se,v$sql s where p.name='db_block_size' and su.session_addr=se.saddr and s.hash_value=su.sqlhash and s.address=su.sqladdr order by se.username,se.sid; --刪除對(duì)應(yīng)的'sid,serial#' alter system kill session 'sid,serial#'
附：查看表空間是否具有自動(dòng)擴(kuò)展的能力
--查看表空間是否具有自動(dòng)擴(kuò)展的能力 SELECT T.TABLESPACE_NAME,D.FILE_NAME, D.AUTOEXTENSIBLE,D.BYTES,D.MAXBYTES,D.STATUS FROM DBA_TABLESPACES T,DBA_DATA_FILES D WHERE T.TABLESPACE_NAME =D.TABLESPACE_NAME ORDER BY TABLESPACE_NAME,FILE_NAME;
到此，相信大家對(duì)“怎么查詢mysql和oracle數(shù)據(jù)庫(kù)空間”有了更深的了解，不妨來實(shí)際操作一番吧！這里是創(chuàng)新互聯(lián)網(wǎng)站，更多相關(guān)內(nèi)容可以進(jìn)入相關(guān)頻道進(jìn)行查詢，關(guān)注我們，繼續(xù)學(xué)習(xí)！
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