. Implement or fix more of the OS specific statistics gathering functions.
This allows jconsole to show valid statistics for the following
OperatingSystem MBean statistics (some of these statistics are also shown
in the Summary and VM tab of jconsole):
TotalSwapSpaceSize, FreeSwapSpaceSize, FreePhysicalMemorySize and
Note that MaxFileDescriptorCount has always been correct as far as I
. Also, implement the function for ProcessCpuTime using a non-deprecated
function (getrusage(2) rather than times(3)).
These changes are restricted to 6.x and higher and have only been tested
on 6.x (where they appear to work correctly). The changes are not valid
for 4.x. Their validity on 5.x and 7.x is unknown (testing welcome).
The PR is not fully addressed by these changes since
CommittedVirtualMemorySize and OpenFileDescriptorCount remain bogus.
Suggestions on how to get these without using kvm(3) would be appreciated.