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@ -1,5 +1,5 @@ |
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<!-- |
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$PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.16 2005/09/13 01:51:18 alvherre Exp $ |
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$PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.17 2005/09/13 15:24:56 neilc Exp $ |
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--> |
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<chapter Id="runtime-config"> |
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<title>Run-time Configuration</title> |
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@ -1715,20 +1715,20 @@ archive_command = 'copy "%p" /mnt/server/archivedir/"%f"' # Windows |
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<para> |
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Sets the planner's assumption about the effective size of the |
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disk cache that is available to a single index scan. This is |
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factored into estimates of the cost of using an index; a higher |
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value makes it more likely index scans will be used, a lower |
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value makes it more likely sequential scans will be used. When |
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setting this parameter you should consider both |
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factored into estimates of the cost of using an index; a |
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higher value makes it more likely index scans will be used, a |
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lower value makes it more likely sequential scans will be |
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used. When setting this parameter you should consider both |
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<productname>PostgreSQL</productname>'s shared buffers and the |
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portion of the kernel's disk cache that will be used for |
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<productname>PostgreSQL</productname> data files. Also, take into |
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account the expected number of concurrent queries using different |
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indexes, since they will have to share the available space. |
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This parameter has no effect on the size of shared memory |
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allocated by PostgreSQL, nor does it reserve kernel disk cache; |
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it is used only for estimation purposes. |
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The value is measured in disk pages, which are |
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normally 8192 bytes each. The default is 1000. |
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<productname>PostgreSQL</productname> data files. Also, take |
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into account the expected number of concurrent queries using |
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different indexes, since they will have to share the available |
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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 |
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estimation purposes. The value is measured in disk pages, |
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which are normally 8192 bytes each. The default is 1000. |
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</para> |
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</listitem> |
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</varlistentry> |
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@ -3662,7 +3662,8 @@ dynamic_library_path = 'C:\tools\postgresql;H:\my_project\lib;$libdir' |
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determines whether OIDs will be included in tables created by |
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<command>SELECT INTO</command>. In <productname>PostgreSQL</> |
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8.1 <varname>default_with_oids</> is disabled by default; in |
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prior versions of PostgreSQL, it was on by default. |
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prior versions of <productname>PostgreSQL</productname>, it |
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was on by default. |
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</para> |
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<para> |
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