#揭秘Oracle 12c in-memory option#
#揭秘Oracle 12c in-memory option# #揭秘Oracle 12c in-memory option#?参数inmemory_columnar_size将控制IMCC的大小,注释为:size in bytes of imc pool。使用前提之一应当是compatible为12.0.0以上,所以这个IMCC特性是几乎不可能backport到11.2上。Orac
#揭秘Oracle 12c in-memory option#
#揭秘Oracle 12c in-memory option#?参数inmemory_columnar_size将控制IMCC的大小,注释为:size in bytes of imc pool。使用前提之一应当是compatible为12.0.0以上,所以这个IMCC特性是几乎不可能backport到11.2上。Oracle 12c最卖座特性!
#揭秘Oracle 12c in-memory option#和Oracle的其他特性一样,IMCC特性也会引入一些隐藏参数来控制特性行为,这些参数会包括_enable_imc_sys 是否在SYSTEM表空间上启用IMC,_imc_dbg_scan 用来debug IMC扫描,同时引入了IMC_SCAN TRACE机制,喜欢研究新特性的同学有的搞了
#揭秘Oracle 12c in-memory option#这个option在内部叫做in memory columnar & compression (IMCC) project,缩写IMCC,例如其引入了一个新的in-memory数据引擎,称之为IMCC-DE。 IMCC项目最早大概在2006年被提出,该项目的三大目标:快的离谱的全表扫描,连接和聚集,DML于内存压缩数据的速度几乎一样
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原文地址:#揭秘Oracle 12c in-memory option#, 感谢原作者分享。

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