pvillard31 commented on code in PR #7891:
URL: https://github.com/apache/nifi/pull/7891#discussion_r1362383549
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nifi-bootstrap/src/main/java/org/apache/nifi/bootstrap/RunNiFi.java:
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@@ -1392,6 +1407,45 @@ public boolean accept(final File dir, final String
filename) {
}
}
+ private String printBasicOSJavaDetails(final String xms, final String xmx)
{
+ ObjectMapper mapper = new ObjectMapper();
+ ObjectNode details = mapper.createObjectNode();
+
+ // java version
+ details.put("javaVersion", System.getProperty("java.version"));
+
+ // num cores
+ final OperatingSystemMXBean os =
ManagementFactory.getOperatingSystemMXBean();
+ details.put("cores", os.getAvailableProcessors());
+
+ // max file descriptor count + total physical memory
+ try {
+ final OperatingSystemMXBean osStats =
ManagementFactory.getOperatingSystemMXBean();
+ final Class<?> unixOsMxBeanClass =
Class.forName("com.sun.management.UnixOperatingSystemMXBean");
+ if (unixOsMxBeanClass.isAssignableFrom(osStats.getClass())) {
+ final Method totalPhysicalMemory =
unixOsMxBeanClass.getMethod("getTotalPhysicalMemorySize");
Review Comment:
I believe that some users tend to set a very high heap, not leaving enough
room for off-heap. Having the total memory available on the host may be useful.
If the information is not available, we would see a null value.
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