消息的含义“在安全点期间合并的操作” [英] Meaning of message "operations coalesced during safepoint"
问题描述
Java应用程序运行时使用以下标志:-XX:+ PrintSafepointStatistics,然后
在标准输出控制台上生成以下行:
2个虚拟机操作在安全点合并
任何人都在意解释这是什么意思?
更一般地说 - 是否有一个Java参考手册,用于详细说明所有JVM标志,它们的使用以及最重要的预期输出,并提供相关说明?
这里列出了可能的虚拟机操作。
当VM处于安全点时处理的每个随后的虚拟机操作都会增加该计数器,即,如果处理1个虚拟操作系统比未增加虚拟操作系统,则处理2个虚拟操作系统会增加一次,如果处理3个虚拟操作系统增加两次(等等)。
A java app runs with the following flag: -XX:+PrintSafepointStatistics, and then produces the following line on the standard output console:
2 VM operations coalesced during safepoint
Anyone cares to explain what this mean ?
More generally - is there a Java reference manual somewhere detailling all JVM flags, their use and, most importantly, the expected output, with relevant explanations ?
Here is a list of the possible VM operations.
This counter is incremented for each subsequent vm operation dealt with while the VM is at a safepoint, i.e. if 1 vm op is processed than it is not incremented, if 2 vm ops are processed it is incremented once, if 3 vm ops are processed it is incremented twice (etc etc).
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