1.查看已分配内存,看到memory_max_target为20GSQL> show parameter sga NAME TYPE VALUE------------------------------------ ----------- ------------------------------lock_sga boolean FALSEpre_page_sga bool
--1.查看表空间的名称及大小 )), ) 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, ), ) total_space FROM dba_data_files ORDER
查看当前用户的缺省表空间 SQL>select username,default_tablespace from user_users; 查看当前用户的角色 SQL>select * from user_role_privs; 查看当前用户的系统权限和表级权限 SQL>select * from user_sys_privs; SQL>select * from user_tab_privs; 查看用户下所有的表 SQL>select * from user_tables;
Eclipse崩溃,错误提示:MyEclipse has detected that less than 5% of the 64MB of Perm Gen (Non-heap memory) space remains. It is strongly recommendedthat you exit and restart MyEclipse with new virtual machine memoryparamters to increase this memory. Failure
/*备注:表空间是数据库的逻辑组成部分从物理上将:数据库数据存放在数据文件中从逻辑上将:数据库则是存放在表空间中表空间由一个或是多个数据文件组成*/ --1.查看用户下面的所有的表SELECT * FROM USER_TABLES;SELECT * FROM DBA_TABLES WHERE OWNER = 'COMM_USER'; --1.1查看表所在的表空间 select TABLE_NAME,TABLESPACE_NAME from dba_tables t where t.table_n
http://www.2cto.com/database/201107/95313.html 一种是分配给一个表的物理空间数量,而不管空间是否被使用.可以这样查询获得字节数:select segment_name, bytes from user_segments where segment_type = 'TABLE'; 或 Select Segment_Name,Sum(bytes)/1024/1024 from User_Extents Group By Segment_Name; 另一种
查看当前用户的缺省表空间 SQL>select username,default_tablespace from user_users; 查看当前用户的角色 SQL>select * from user_role_privs; 查看当前用户的系统权限和表级权限 SQL>select * from user_sys_privs; SQL>select * from user_tab_privs; 查看用户下所有的表 SQL>select * from user_tables;
修改oracle内存占用 >show parameter sga; (查看内存占用情况) NAME TYPE VALUE ------------------------------------ ----------- ------------- lock_sga boolean FALSE pre_page_sga