问题描述
java命令的帮助菜单显示，-server选项用于选择服务器" VM.它还指出服务器"是默认选项.为什么这么多余?
The help menu for java command says that -server option is to select the "server" VM. It also states that 'server' is the default option. Why so redundant?
如果有帮助，则"java -version"将产生:
If it is of any help, "java -version" yields:
java version "1.8.0_191"
Java(TM) SE Runtime Environment (buil 1.8.0_191-b12)
Java HotSpot(TM) 64-Bit Server VM (build 25.191-b12, mixed mode)
推荐答案
-client和-server在现代JVM上被忽略，就这么简单. JIT 编译器 C1和C2有两个，但是有5个 tiers ，整个荣耀中的所有细节都是此处在评论中.
-client and -server are ignored on modern JVMs, as easy as that. There are two JITcompilers C1 and C2, but there are 5 tiers, all the details in the entire glory are here in the comments.
这些标志用于控制C1和C2的行为-禁用或不禁用；现在，这由另外两个标志控制:XX:-TieredCompilation-XX:TieredStopAtLevel=1
These flags used to control how C1 and C2 would act - disable or not; this is now controlled by two other flags : XX:-TieredCompilation -XX:TieredStopAtLevel=1
这篇关于当服务器VM为默认选项时，为什么-server选项在那里?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！