Oracle Database - Enterprise Edition - Version 12.2.0.1 and laterInformation in this document applies to any platform.SymptomsThe granule size is determined based on the amount of memory requested at the instance startup. It is based on the SGA_MAX_SIZE.SGA...
ORA-00849: SGA_TARGET 10737418240 cannot be set to more than MEMORY_MAX_TARGET 0. --1.查看当前内存组件参数值 col name for a30; col VALUE for a30; select INST_ID,name, VALUE / 1024 / 1024 size_MB, issys_modifiable from gv$parameter where name in ('pga_aggregate_target', 'memory_tar...
Oracle Database increments SCNs in the system global area (SGA). When a transaction modifies data, the database writes a new SCN to the undo data segment assigned to the transaction. The log writer process then writes the commit record of the transaction immediately to the online redo log....
Services in Oracle Database 10g Migrate datbase from single instance to Oracle RAC Oracle RAC 连接到指定实例 Oracle RAC 负载均衡测试(结合服务器端与客户端) Oracle RAC 服务器端连接负载均衡(Load Balance) Oracle RAC 客户端连接负载均衡(Load Balance) ORACLE RAC 下非缺省端口监听配置(listener.ora tnsna...
MyBatisBatchItemWriter Cannot change the ExecutorType when there is an existing transaction,但凡使用mybatis,同时与spring集成使用时,接下来要说的这个问题是躲不了的。众所周知,mybatis的SqlSessionFactory在获取一个SqlSession时使用默认Executor或必须要指定一
*.sga_target=289406976*.undo_management='MANUAL' *.undo_tablespace='SYSTEM' *.user_dump_dest='/oradata/oracle/admin/ORA10GR2/udump' :q -bash-3.00$ sqlplus / as sysdba SQL*Plus: Release 10.2.0.5.0 - Production on Tue Jun 26 16:40:58 2012 ...
ターミナル・ウィンドウを使用し、DBAユーザーとしてSQL*Plusセッションを開始したら、flush.sqlスクリプトを実行して各種のSGAキャッシュを空にします。 sqlplus / as sysdba @flush 3. Oracle Enterprise Managerに戻り、「Exadata Simulation」をクリックします。 4. Task NameにCOMPARE_EXADATA...
每次修改cache buffer中的这些block时,需要先在PGA中生成对应的change vector,然后由server process从PGA copy到SGA REDO LOG BUFFER。user process修改数据时产生redo entries,此时redo存于pga中,将PGA中redo copy到 redo log buffer 需要redo copy latch,LGWR只有等待进程COPY 完成才能把目标log buffer block写入redo...
A.RBAL B.CKPT C.SMON D.PMON E.MMON F.CTWRG.DBWR 查看答案
V$BLOCK_CHANGE_TRACKING table to determine whether change tracking is enabled and CTWR dba buffer is being used: SELECT status FROM v$block_change_tracking If the CTWR process is enabled, you can view the size of the CTWR dba buffer by looking at v$sgastat: SELECT * FROM v$sgastat WHERE ...