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From: Ron Johnson <ronljohnsonjr@gmail.com>
Date: Sun, 2 Feb 2025 09:57:06 -0500
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 <CANzqJaCP0C63feoHBG-jCG_=MWrzhs6jNykANf_KrUHTtbuw+g@mail.gmail.com>
Subject: Re: Parameter Settings - Instance-Database-Specific
To: Pgsql-admin <pgsql-admin@lists.postgresql.org>
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On Sun, Feb 2, 2025 at 7:53=E2=80=AFAM Edwin UY <edwin.uy@gmail.com> wrote:

> Hi,
>
> I have PostgreSQL Instance that has several DBs.
> I assume there are instance specific and database specific parameter
> settings?
> How do I check this? Using the source column of pg_setting?
> Is this true for both Aurora PostgreSQL / RDS and non-AWS PostgreSQL?
>
> =3D> \d pg_settings
>                View "pg_catalog.pg_settings"
>      Column      |  Type   | Collation | Nullable | Default
> -----------------+---------+-----------+----------+---------
>  name            | text    |           |          |
>  setting         | text    |           |          |
>
 [snip]

>
> select distinct source from pg_settings ;
>        source
> --------------------
>  client
>  configuration file
>  default
>  database
>  override
>  command line
> (6 rows)
>

What do you get when you run:
SELECT * FROM pg_setting WHERE source =3D ''database';

More important, though, is the fact that pg_settings does not have a
"datname" column.  Thus, it's values are all global to the instance.

--=20
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 dir=3D"ltr"><div dir=3D"ltr">On Sun, Feb 2, 2025 at 7=
:53=E2=80=AFAM Edwin UY &lt;<a href=3D"mailto:edwin.uy@gmail.com" target=3D=
"_blank">edwin.uy@gmail.com</a>&gt; wrote:</div><div class=3D"gmail_quote">=
<blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-=
left:1px solid rgb(204,204,204);padding-left:1ex"><div dir=3D"ltr"><div><sp=
an style=3D"font-family:monospace">Hi,</span></div><div><span style=3D"font=
-family:monospace"><br></span></div><div><span style=3D"font-family:monospa=
ce">I have PostgreSQL Instance that has several DBs.</span></div><div><span=
 style=3D"font-family:monospace">I assume there are instance specific and d=
atabase specific parameter settings?<br></span></div><div><span style=3D"fo=
nt-family:monospace">How do I check this? Using the source column of pg_set=
ting?</span></div><div><span style=3D"font-family:monospace">Is this true f=
or both Aurora PostgreSQL / RDS and non-AWS PostgreSQL?<br></span></div><di=
v><span style=3D"font-family:monospace"><br></span></div><div><span style=
=3D"font-family:monospace">=3D&gt; \d pg_settings<br></span></div><div><spa=
n style=3D"font-family:monospace">=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0=
 =C2=A0=C2=A0 View &quot;pg_catalog.pg_settings&quot;<br>=C2=A0 =C2=A0 =C2=
=A0Column =C2=A0 =C2=A0 =C2=A0| =C2=A0Type =C2=A0 | Collation | Nullable | =
Default<br>-----------------+---------+-----------+----------+---------<br>=
=C2=A0name =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0| text =C2=A0 =C2=A0| =
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 | =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0|<br=
>=C2=A0setting =C2=A0 =C2=A0 =C2=A0 =C2=A0 | text =C2=A0 =C2=A0| =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 | =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0|<br></span></=
div></div></blockquote><div>=C2=A0[snip]</div><blockquote class=3D"gmail_qu=
ote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,20=
4);padding-left:1ex"><div dir=3D"ltr"><div><span style=3D"font-family:monos=
pace"><br></span></div><div><span style=3D"font-family:monospace">select di=
stinct source from pg_settings ;<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0source<br>--=
------------------<br>=C2=A0client<br>=C2=A0configuration file<br>=C2=A0def=
ault<br>=C2=A0database<br>=C2=A0override<br>=C2=A0command line<br>(6 rows)<=
br></span></div><div><span style=3D"font-family:monospace"></span></div></d=
iv></blockquote></div><div><br clear=3D"all"></div><div>What do you get whe=
n you run:</div><div>SELECT * FROM pg_setting WHERE source =3D &#39;&#39;da=
tabase&#39;;</div><div><br></div><div>More important, though, is the fact t=
hat pg_settings does not have a &quot;datname&quot; column.=C2=A0 Thus, it&=
#39;s values are all global to the instance.</div><div><br></div><span clas=
s=3D"gmail_signature_prefix">-- </span><br><div dir=3D"ltr" class=3D"gmail_=
signature"><div dir=3D"ltr">Death to &lt;Redacted&gt;, and butter sauce.<di=
v>Don&#39;t boil me, I&#39;m still alive.<br><div><div>&lt;Redacted&gt; lob=
ster!</div></div></div></div></div></div>
</div>

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