Windows Server
A family of Microsoft server operating systems that support enterprise-level management, data storage, applications, and communications.
12,942 questions
SetProcessWorkingSetSizeEx() is not working on Windows Server 2022 - x64 OS.
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Arjun Annam
1
Reputation point
We are planning to test and use SetProcessWorkingSetSizeEx() for setting limit on memory (working set) consumed by a service so that working set by our service never exceeds the limit set in dwMaximumWorkingSetSize parameter of this API. We are calling the API with QUOTA_LIMITS_HARDWS_MAX_ENABLE.
We are aware of the impact of this on System's performance when the limit is exceeds as there can be a lot of page faults though the memory is available, depending the on multiple factors. We are in the process of evaluating this, for evaluating we are setting 1/10th of Physical Memory Bytes as limit.
We tested this API on Windows Server 10 - x64, Windows Server 2019 - x64. The API returns success and the working set of our process never exceeds the limit.
And on Windows Server 2022 - x64, the API returns success but the limit is not honored by the OS. The working set by our process exceeds the limit.
As per the documentation of this API, minimum supported OS are
Minimum supported client Windows Vista [desktop apps | UWP apps]
Minimum supported server Windows Server 2003 [desktop apps
Could anyone please help us on this, if anyone using this API? If there is any change in the behavior of this API on Windows Server 2022 OS.
If more details needed for understanding the issue, let me know. I am happy to share more details.
If this is not the correct forum could you please let me know the right forum in which I would get info?
Regards,
Arjun Annam
Windows Server
Windows API - Win32
Windows API - Win32
A core set of Windows application programming interfaces (APIs) for desktop and server applications. Previously known as Win32 API.
2,587 questions
C++
C++
A high-level, general-purpose programming language, created as an extension of the C programming language, that has object-oriented, generic, and functional features in addition to facilities for low-level memory manipulation.
3,690 questions
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David Lowndes 4,711 Reputation points2022-09-12T12:46:16.133+00:00 Reading the API documentation, there seems to be considerable scope for the OS to ignore these settings and do what it thinks is best. Have you tested with exactly the same hardware and all other software the same & the machine load the same?
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RLWA32 45,236 Reputation points2022-09-12T13:01:25.737+00:00 We are calling the API with QUOTA_LIMITS_HARDWS_MAX_ENABLE.
The questioner indicated that the flag is set and the docs say "The QUOTA_LIMITS_HARDWS_MIN_ENABLE and QUOTA_LIMITS_HARDWS_MAX_ENABLE flags enable you to ensure that limits are enforced."
So to me the question seems to be is the questioner's observed behavior indicative of a bug or a documentation error?
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David Lowndes 4,711 Reputation points
2022-09-12T13:39:59.697+00:00 True, I missed reading that last sentence :(
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RLWA32 45,236 Reputation points
2022-09-12T13:46:57.007+00:00 Technical documentation is difficult to write. It's also difficult to read. :)
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Arjun Annam 1 Reputation point
2022-09-12T14:38:45.677+00:00 Thanks for the queries.
The hardware used is different for Server 2019 machine and Server 2022 machine. As you already noticed we are using QUOTA_LIMITS_HARDWS_MAX_ENABLE, so that limit is enforced. IMO, as per the documentation and with this flag limit should be enforced irrespective of the hardware.
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David Lowndes 4,711 Reputation points
2022-09-12T14:42:35.457+00:00 Other than calling MS (paid) support, or adding your feedback to the documentation and hoping you hear back; unless someone here just knows what the situation is, I'm not aware of how you can get a definitive answer.
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Arjun Annam 1 Reputation point
2022-09-13T05:42:31.013+00:00 Thanks for the suggestion. I will post feed back on the documentation page.
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