SGA之外是另一个标记为Database Smart Flash Cache的内存组件。它通过一个双向箭头连接到SGA内部的Buffer Cache框。SGA外部有三个框,分别为服务器进程1、服务器进程2和服务器进程3,以及两个框,分别为后台进程。这5个进程中的每一个都通过双向箭头连接到大SGA框,表示每个进程从SGA读取和写入数据。每个进程还通过一...
你的buffer size 设定的小啦。默认的是 10000 如果 dbms_output 超过 10000 就会报错
查询出来的结果Buffer Cache的命中率应该在90%以上,否则需要增加数据缓冲区的大小。 清空Buffer Cache和数据字典缓存 SQL> alter system flush shared_pool; //请勿随意在生产环境执行此语句 System altered SQL> alter system flush buffer_cache; //请勿随意在生产环境执行此语句 System altered bytes sent via SQL...
dbms_output.put_line('alter tablespace '||i.tablespace_name||' begin backup;'); for j in (select file_name from dba_data_files where tablespace_name=i.tablespace_name) loop dbms_output.put_line('host cp '||j.file_name||' /home/oracle/hot_backup'); end loop; dbms_output.put_line...
刷新BUFFER CACHE ALTER SESSION SET EVENTS 'immediate trace name flush_cache'; DROP_SEGMENTS 手工删除临时段。当这些临时段无法自动清除的时候可以手工清除 alter session set events 'immediate trace name DROP_SEGMENTSlevel ts#+1'; ts#是指要删除临时段的表空间的ts# ...
segment_name from dba_segments where segment_namein(select segment_name from dba_lobs where table_name='MACLEAN_LOB'and owner='MACLEAN');alter system flush buffer_cache;alter system flush shared_pool;alter systemsetevents'44951 trace name context forever, level 1024';exec dbms_workload_...
("tempblob", OracleType.Blob)).Direction = ParameterDirection.Output; command.ExecuteNonQuery();vartempLob = (OracleLob)command.Parameters[0].Value;vartempbuff =newbyte[10000]; tempLob.BeginBatch(OracleLobOpenMode.ReadWrite); tempLob.Write(tempbuff,0,tempbuff.Length); tempLob.EndBatch(); ...
OUTPUT_MESSAGE_TO_REPORT RESET_USEREXIT_STATS SET_COLUMN_VALUE_BY_INDEX SET_COLUMN_VALUE_BY_NAME SET_OPERATION_TYPE SET_RECORD_BUFFER SET_SESSION_CHARSET SET_TABLE_NAME Part II Oracle GoldenGate Classic Architecture 4 Summary of Extract Parameters (Classic Architecture) THREADOPTIONS AUTOSTART RMT...
Oracle Database creates server processes to handle the requests of user processes connected to an instance. A server process can be either of the following: Adedicated server process, which services only one user process Ashared server process, which can service multiple user processes ...
execute dbms_stats.gather_table_stats(user,'t3') alter table t3 add constraint t3_uk unique(n1); select /*+ leading(t3 t1) use_nl(t1) index(t1(rand)) */ t3.n1, max(t1.v1) from t3, t1 where t1.rand = t3.n1 group by t3.n1 / PLAN_TABLE_OUTPUT --- SQL_ID 7mxmx715yfb73...