ERROR at line 1: ORA-16000: database or pluggable database open for read-only access 实现机制探究 备库: SQL> alter session set events '10046 trace name context forever,level 12'; SQL> insert into t1 select * from t1; 257 rows created. SQL> commit; Commit complete. SQL> alter session...
waits_controfileio.Query=SELECTto_char(sum(decode(event,'control file sequential read', total_waits, 'controlfile single write', total_waits, 'control file parallel write',total_waits,0)))ControlFileIO FROM V$system_event WHERE 1=1 AND event not in ( 'SQL*Net messagefrom client', 'SQL*...
DB_FILE_MULTIBLOCK_READ_COUNT parameter is used to specifies the maximum number of blocks read in one I/O operation during a sequential scan. SQL>show parameter DB_FILE_MULTIBLOCK_READ_COUNT NAME TYPE VALUE--- --- ---db_file_multiblock_read_countinteger128 SQL>alt...
ACFS delivers CSS membership changes to the Oracle cluster file system. These membership changes are required for the file system to maintain file system consistency within the cluster. Oracle ASM instances, Oracle RAC ACMS Atomic Control File to Memory Service Process Coordinates consistent updates to...
If the process finds the data already in the cache (a cache hit), it can read the data directly from memory. If the process cannot find the data in the cache (a cache miss), it must copy the data block from a data file on disk into a buffer in the cache before accessing the ...
This includes the device details along with required permissions to enable grid and oracle user to have read/write privileges on these devices. To configure the UDEV rules on all Oracle RAC Nodes, follow this step: 1. Assign IO Policy by creating a new file named “71-nvme-iopolicy-...
E) DBA_DATA_FILES must be resynchronized manually with the control file an order to have it display the new file names. Answer:BD 解析:数据文件改名字,数据字典和动态性能视图会自动更新 Q39.You execute this command: 1. Which two statements are true about the BIG_TBS tablespace? (Choose two...
Configure read-write SNMP community string (yes/no) [n]: Enter Enter the switch name: <nexus-A-hostname> Continue with Out-of-band (mgmt0) management configuration? (yes/no) [y]: Enter Mgmt0 IPv4 address: <nexus-A-mgmt0-ip> Mgmt0 IPv4 netmask: <nexus-A-mgmt0-netmask> ...