Re: read-only GUC variables - supporting doc changes
От | Tom Lane |
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Тема | Re: read-only GUC variables - supporting doc changes |
Дата | |
Msg-id | 6823.1070688162@sss.pgh.pa.us обсуждение исходный текст |
Ответ на | read-only GUC variables - supporting doc changes (Joe Conway <mail@joeconway.com>) |
Список | pgsql-patches |
Joe Conway <mail@joeconway.com> writes: > The attached is the supporting documentation for the read-only GUC > variable changes. Comments? Most of this paragraph strikes me as noise: > + Shows the size of a disk block. It is determined by the value > + of <literal>BLCKSZ</> when building the server. The default > + value is 8192 bytes. Each data file (heap or index) is divided > + into disk blocks which may be thought of as the unit of I/O. > + A <productname>PostgreSQL</productname> buffer contains exactly > + one disk block. A <productname>PostgreSQL</productname> disk page > + is an abstraction layered on top of a disk block. Specifically, > + while a disk block can be unformatted, a disk page is always a > + formatted page. The <varname>shared_buffers</varname> setting is > + influenced by <varname>block_size</varname>. See > + <xref linkend="runtime-config-resource"> for information. I think you could drop the middle four sentences ("Each ... formatted page") without losing much. Otherwise it looks fine ... regards, tom lane
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