JDK-8324287 : Record total and free swap space in JFR
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: jfr
  • Affected Version: 23
  • Priority: P4
  • Status: Resolved
  • Resolution: Fixed
  • OS: generic
  • CPU: generic
  • Submitted: 2024-01-22
  • Updated: 2024-03-03
  • Resolved: 2024-02-01
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JDK 23
23 b09Fixed
Related Reports
Relates :  
JDK-8325139 - JFR SwapSpace event - add free swap space information on Linux when running in a container environment
Relates :  
JDK-8327171 - Fix more NULL usage backsliding
Description
Total and free swap space should be recorded in JFR, because it is important to know e.g. in case of memory shortages.

Currently we only have a container related event (ContainerMemoryUsage) that provides some info but no general event.
PhysicalMemory could be enhanced or a new event added.

There is already some coding (see Java_com_sun_management_internal_OperatingSystemImpl_getTotalSwapSpaceSize0 and
Java_com_sun_management_internal_OperatingSystemImpl_getFreeSwapSpaceSize0)  for the swap space info retrieval.
Comments
Changeset: cab74b07 Author: Matthias Baesken <mbaesken@openjdk.org> Date: 2024-02-01 12:50:18 +0000 URL: https://git.openjdk.org/jdk/commit/cab74b075e4572529a21bf8ac652ec2f1ab4fcaf
01-02-2024
A pull request was submitted for review. URL: https://git.openjdk.org/jdk/pull/17581 Date: 2024-01-26 07:54:22 +0000
26-01-2024
A separate event would probably be best.
23-01-2024