SGA实际大小 = DB_CACHE_SIZE + DB_KEEP_CACHE_SIZE + DB_RECYCLE_CACHE_SIZE + DB_nk_CACHE_SIZE + SHARED_POOL_SIZE + LARGE_POOL_SIZE + JAVA_POOL_SIZE + STREAMS_POOL_SIZE(10g中的新内存池) + LOG_BUFFERS+11K(Redo Log Buffer的
shmmax - Half the size of physical memory in bytes. See My Oracle Support Note 567506.1 for additional information about configuring shmmax.再根据redhat的官方文档(https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/performance_tuning_guide/sect-red_hat_enterprise_linux-per...
如果该表不是在线重新定义的候选对象,则此过程会引发错误,指示无法在线重新定义该表的原因。 3). 创建具有所有所需逻辑和物理属性的空临时表(与要重新定义的表在同一schema中)。如果要删除列,则不要将它们包括在临时表的定义中。如果要添加列,则将列定义添加到临时表中。如果要修改列,则在临时表中使用所需的属...
(BYTES)/1024/1024 as SIZE_Mb from dba_segments where segment_type = 'TABLE' group by owner order by 2; #查看用户所拥有表即其使用大小 select owner,segment_name,tablespace_name,BYTES/1024/1024 size_mb from dba_segments where segment_type='TABLE' and owner = 'DDCW' #查看用户使用表空间(...
set pagesize 100 (可以自己设置每页显示的行数) ---(9)&的用法 例:select * from xxcj_emp where job='&job'; 3.Oracle用户管理 通过putty或其他工具登录Linux服务器输入管理员用户名和密码进入系统 然后输入sqlplus /nolog命令 , ---(1)创建用户、给用户赋予权限、回收权限、删除用户 ...
DBMS_STATS.GATHER_SCHEMA_STATS ( ownname VARCHAR2, estimate_percent NUMBER DEFAULT to_estimate_percent_type (get_param('ESTIMATE_PERCENT')), block_sample BOOLEAN DEFAULT FALSE, method_opt VARCHAR2 DEFAULT get_param('METHOD_OPT'), degree NUMBER DEFAULT to_degree_type(get_param('DEGREE')), ...
systemPassword SysPassword1 -createAsContainerDatabase true -numberOfPDBs 1 -pdbName ${PDB_NAME} -pdbAdminPassword PdbPassword1 -databaseType MULTIPURPOSE -memoryMgmtType auto_sga -totalMemory 2000 -storageType FS -datafileDestination "${DATA_DIR}" -redoLogFileSize 50 -emConfiguration NONE -...
COMMENTONCOLUMNuser.T18_SYNC.SYNC_DATA_SIZEIS'同步数据条数';COMMENTONCOLUMNuser.T18_SYNC.LANDING_TABLENAMEIS'落地表名';COMMENTONCOLUMNuser.T18_SYNC.LANDING_SCHEMAIS'落地模式名';/* 向目标库 插入全库同步作业 */INSERTINTOuser.T18_SYNC (SYNC_SQL, PRE_SQL,STATUS, LANDING_SCHEMA)SELECTCASE...
SQL> alter system set db_recovery_file_dest_size = 10G; System altered. SQL> alter system set db_recovery_file_dest = '/home/oracle/oracle-data' scope=spfile; System altered. SQL> shutdown immediate; Database closed. Database dismounted. ORACLE instance shut down. SQL> startup mount; ...
In addition, the smaller the size of a row, the more rows are retrieved per data block, which increases the likelihood that more than one desired row will be retrieved in a single I/O operation. And the smaller the row, the more rows will be kept in Oracle’s system buffers, which ...