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From: Ron Johnson <ronljohnsonjr@gmail.com>
Date: Wed, 28 Jan 2026 10:31:36 -0500
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 <CANzqJaD0Nj2SvXrGCM-p_TUaeN84TzRteo7jxqSdARaZDiXABA@mail.gmail.com>
Subject: Setting huge_pages=off when HugePages are allocated in Linux?
To: Pgsql-admin <pgsql-admin@lists.postgresql.org>
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In the example in this (quite helpful) Cybertec post, 10475 HugePages are
allocated.
https://www.cybertec-postgresql.com/en/huge-pages-postgresql/

If we set "huge_pages = off" within PG and then restart PG, will Linux see
those 10475 HugePages as off-limits to normal 4KiB allocations?

-- 
Death to <Redacted>, and butter sauce.
Don't boil me, I'm still alive.
<Redacted> lobster!

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<div dir=3D"ltr"><div>In the example in this (quite helpful) Cybertec post,=
=C2=A010475 HugePages are allocated.=C2=A0</div><div><a href=3D"https://www=
.cybertec-postgresql.com/en/huge-pages-postgresql/">https://www.cybertec-po=
stgresql.com/en/huge-pages-postgresql/</a></div><div><br></div><div>If we s=
et &quot;huge_pages =3D off&quot; within PG and then restart PG, will Linux=
 see those 10475 HugePages as off-limits to normal 4KiB allocations?</div><=
div><br></div><span class=3D"gmail_signature_prefix">-- </span><br><div dir=
=3D"ltr" class=3D"gmail_signature" data-smartmail=3D"gmail_signature"><div =
dir=3D"ltr">Death to &lt;Redacted&gt;, and butter sauce.<div>Don&#39;t boil=
 me, I&#39;m still alive.<br><div><div>&lt;Redacted&gt; lobster!</div></div=
></div></div></div></div>

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