oracle 常用 系统查询

查索引

 

DBA_INDEXES 或 ALL_INDEXES 或 USER_INDEXES

 

系统统计信息

 

 v$sysstat

 

等待信息

 

v$session_wait

 

v$system_event

 

Oracle 标准的表空间使用情况查询：

 

 

 SELECT d.status "Status", d.tablespace_name "Name", d.contents "Type", d.extent_management "Extent Management", TO_CHAR(NVL(a.bytes / 1024 / 1024, 0), '99,999,990.900') "Size (M)", TO_CHAR(NVL(a.bytes - NVL(f.bytes, 0), 0) / 1024 / 1024, '99999999.999') || '/' || TO_CHAR(NVL(a.bytes / 1024 / 1024, 0), '99999999.999') "Used (M)", TO_CHAR(NVL((a.bytes - NVL(f.bytes, 0)) / a.bytes * 100, 0), '990.00') "Used %" FROM sys.dba_tablespaces d, (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) f WHERE d.tablespace_name = a.tablespace_name(+) AND d.tablespace_name = f.tablespace_name(+) AND NOT (d.extent_management like 'LOCAL' AND d.contents like 'TEMPORARY') UNION ALL SELECT d.status "Status", d.tablespace_name "Name", d.contents "Type", d.extent_management "Extent Management", TO_CHAR(NVL(a.bytes / 1024 / 1024, 0), '99,999,990.900') "Size (M)", TO_CHAR(NVL(t.bytes, 0) / 1024 / 1024, '99999999.999') || '/' || TO_CHAR(NVL(a.bytes / 1024 / 1024, 0), '99999999.999') "Used (M)", TO_CHAR(NVL(t.bytes / a.bytes * 100, 0), '990.00') "Used %" FROM sys.dba_tablespaces d, (select tablespace_name, sum(bytes) bytes from dba_temp_files group by tablespace_name) a, (select tablespace_name, sum(bytes_cached) bytes from v$temp_extent_pool group by tablespace_name) t WHERE d.tablespace_name = a.tablespace_name(+) AND d.tablespace_name = t.tablespace_name(+) AND d.extent_management like 'LOCAL' AND d.contents like 'TEMPORARY'