Oracle常用的几个父栓

Oracle中的父闩大致可以分成2类:有子闩的父闩或者独居的父闩,我们来看看这些父闩的属性:

SQL> select * from v$version;
BANNER
----------------------------------------------------------------
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bi
PL/SQL Release 10.2.0.4.0 - Production
CORE    10.2.0.4.0      Production
TNS for IBM/AIX RISC System/6000: Version 10.2.0.4.0 - Productio
NLSRTL Version 10.2.0.4.0 - Production

SQL> select count(distinct name) from v$latch_children;
COUNT(DISTINCTNAME)
-------------------
                 82

/* 10.2.0.4下共有82种不同子闩,同比11.2.0.1是75种,要比10g中少一些,因为一部分闩在11g中被mutex替代了 */

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