10000 Document that effective cache size does not assume data remains in the · postgres/postgres@6c6e6f7 · GitHub
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Document that effective cache size does not assume data remains in the
cache between queries.
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‎doc/src/sgml/config.sgml

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@@ -2424,7 +2424,9 @@ SET ENABLE_SEQSCAN TO OFF;
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space. This parameter has no effect on the size of shared
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memory allocated by <productname>PostgreSQL</productname>, nor
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does it reserve kernel disk cache; it is used only for estimation
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purposes. The default is 128 megabytes (<literal>128MB</>).
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purposes. The system also does not assume data remains in
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the disk cache between queries. The default is 128 megabytes
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(<literal>128MB</>).
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</para>
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</listitem>
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</varlistentry>

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