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Hi Jonathan, </div>
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<span class="elementToProof">Thank you for your question regarding the swapped_warn event.</span></div>
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<span class="elementToProof">In IBM Spectrum Scale, different categories of health events serve different purposes:</span></div>
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<span class="elementToProof"><b>State-change events (such as degraded, failed, etc.)</b> indicate actual problems or failures. These events typically resolve automatically; only a small number require manual resolution using the mmhealth event resolve command.</span></div>
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<span class="elementToProof"><b>TIP events</b> provide recommendations or highlight minor issues, best\u2011practice deviations, or configuration optimizations. These events do not indicate a failure. If desired, TIP events can be permanently hidden using mmhealth
event hide, and once hidden they will not appear again.</span></div>
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<span class="elementToProof">The <b>swapped_warn </b>event falls into the <b>TIP event category</b>.</span></div>
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<span class="elementToProof">You are correct that a small amount of swap usage is not necessarily problematic, especially when plenty of RAM is available and the system is not actively swapping. However, we have seen multiple real-world cases where even moderate
swap usage negatively impacted system responsiveness and overall Scale performance.</span></div>
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<span class="elementToProof">Because of this, the TIP is intended to help users who want to extract maximum performance from their systems. If swap usage is not a concern in your environment, you can safely hide the TIP and continue operating normally. </span></div>
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<span class="elementToProof">I hope this clarifies the purpose of the event and the available options. Please let me know if you need any additional information.</span></div>
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best regards<br>
<br>
Mathias Dietz</div>
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Storage Scale RAS Architect <br>
<br>
IBM Deutschland Research & Development GmbH</div>
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Vorsitzender des Aufsichtsrats: Wolfgang Wendt</div>
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Geschäftsführung: David Faller</div>
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Sitz der Gesellschaft: Böblingen / Registergericht: Amtsgericht Stuttgart, HRB 243294</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> gpfsug-discuss <gpfsug-discuss-bounces@gpfsug.org> on behalf of Jonathan Buzzard <jonathan.buzzard@strath.ac.uk><br>
<b>Sent:</b> Sunday, February 15, 2026 11:32 PM<br>
<b>To:</b> gpfsug main discussion list <gpfsug-discuss@gpfsug.org><br>
<b>Subject:</b> [EXTERNAL] [gpfsug-discuss] swapped_warn event</font>
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I have a question about the swapped_warn event. It would appear the only <br>
way to clear this message is to reboot the node or do a swapoff/swapon<br>
<br>
If I try an mmhealth event resolve swapped_warn I get a message to say <br>
swapped_warn is not manually resolvable.<br>
<br>
Looking at one of the nodes showing this event, there is 1.2GB of swap <br>
being used which is not usual on a Linux server. There is however 160GB <br>
of free RAM, the server is not actually "swapping" at the moment and the <br>
event is not resolving.<br>
<br>
It does not appear to be a configurable threshold either.<br>
<br>
So given that a Linux server is likely to "use" swap even if it has <br>
*never* actually ran out of RAM and swapped since it was booted. What's <br>
the purpose of this event and can I do something about it?<br>
<br>
<br>
JAB.<br>
<br>
-- <br>
Jonathan A. Buzzard Tel: +44141-5483420<br>
HPC System Administrator, ARCHIE-WeSt.<br>
University of Strathclyde, John Anderson Building, Glasgow. G4 0NG<br>
<br>
<br>
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