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在看一个东西的时候,有个词:Sun JRE installer,这是什么呢?
附上原文:
CDS is supported on platforms where the Java HotSpot Client VM is the
default, except for Windows 95/98/ME. When the JRE is installed on
supported platforms using the Sun provided installer, the installer
loads a set of classes from the system jar file into a private
internal representation, and dumps that representation to a file,
called a "shared archive". If the Sun JRE installer is not being used,
the shared archive can be created manually, as is explained in the
Java HotSpot VM documentation (linked to from the 1.5.0 release
notes). During subsequent JVM invocations, the shared archive is
memory-mapped in, saving the cost of loading those classes and
allowing much of the JVM's metadata for these classes to be shared
among multiple JVM processes. |
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