future2012lg

摘要： APPLIES TO:Oracle Database - Enterprise Edition - Version 8.1.5.0 and laterInformation in this document applies to any platform.GOALHow to release Tem... 阅读全文

摘要： APPLIES TO:Oracle Database - Enterprise Edition - Version 8.1.7.4 to 11.2.0.1 [Release 8.1.7 to 11.2]Information in this document applies to any platf... 阅读全文

摘要： 11gR2 Clusterware Key Facts11gR2 Clusterware is required to be up and running prior to installing a 11gR2 Real Application Clusters database.The GRID ... 阅读全文

摘要： # 总核数 = 物理CPU个数 X 每颗物理CPU的核数 # 总逻辑CPU数 = 物理CPU个数 X 每颗物理CPU的核数 X 超线程数# 查看物理CPU个数cat /proc/cpuinfo| grep "physical id"| sort| uniq| wc -l# 查看每个物理CPU中cor... 阅读全文

摘要： What is "Library cache lock" ?This event controls the concurrency between clients of the library cache. It acquires a lock on the object handle so tha... 阅读全文

摘要： What is a 'library cache: mutex X' wait?The mutex feature is a mechanism to control access to in memory structures. It is used in a number of areas in... 阅读全文

摘要： 模拟一下goldengata中断后，重新同步操作：1、关掉源端抽取进程GGSCI(20081122-2105)15>infoallProgramStatusGroupLagTimeSinceChkptMANAGERRUNNINGEXTRACTRUNNINGEORA00:00:0000:00:03EX... 阅读全文

摘要： 1.Goldengate的起停启动goldengate a> 启动goldengate时最好先从target节点开始，然后是source节点.否则data pump进程可能会由于没有收到target端的响应而异常退出。 b> manager进程是其他进程的管理程序，需要先启动。如果manager配置... 阅读全文

摘要： 该特性主要针对 统计信息陈旧、无直方图或虽然有直方图但仍基数计算不准确的情况， Cardinality基数的计算直接影响到后续的JOIN COST等重要的成本计算评估，造成CBO选择不当的执行计划Oracle Database - Enterprise Edition - Version 11.2.... 阅读全文

摘要： 环境：DB VERSION: 11.2.0.4.0RAC 2 nodes问题：邮件显示rman备份失败，查看rman备份日志Starting Control File and SPFILE Autobackup at 2013-12-30 04:07:02released channel: c1re... 阅读全文