原文链接:http://www.oracle.com/technetwork/articles/fuecks-lobs-095315.html Working with LOBs in Oracle and PHP by Harry Fuecks Hitting the 4,000-byte limit? Enter LOBs... Downloads for this article: Oracle Database 10g Zend Core for Oracle Apache HTTP…
http://www.oracle.com/technetwork/articles/fuecks-lobs-095315.html Working with LOBs in Oracle and PHPby Harry Fuecks Hitting the 4,000-byte limit? Enter LOBs... Downloads for this article:Oracle Database 10gZend Core for OracleApache HTTP Server 1.3…
LOBs and ORA-01555 troubleshooting (Doc ID 846079.1) APPLIES TO: Oracle Database Cloud Schema Service - Version N/A and laterOracle Database Exadata Express Cloud Service - Version N/A and laterOracle Database Exadata Cloud Machine - Version N/A and…
redo重做日志是Oracle数据库恢复(recovery)的基础:但在很多情况下可以通过禁用重做日志的产生来加速SQL语句的完成,也就是我们所说的可nologging化的操作,这些操作大多是或串行的或并行的数据载入. 那么哪些操作是允许被nologging化的呢?首先需要注意的是普通的DML操作,即:常规insert,update,和delete(以及merge)总是不能被nologging执行的.但以下SQL语句则可以以nologging选项执行: direct load (SQL*Load…
select size_for_estimate, buffers_for_estimate ,ESTD_PHYSICAL_READ_factor,ESTD_PHYSICAL_READS from v$db_cache_advice 2 where block_size='8192' and advice_status='ON'; 中,size_for_estimate表示预计的数据库高速缓冲区的大小(即:db_cache_size的值).ESTD_PHYSICAL_READS表…