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@ -10,7 +10,7 @@ |
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alink="#0000ff"> |
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<H1>Frequently Asked Questions (FAQ) for PostgreSQL</H1> |
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<P>Last updated: Sat Jan 29 23:02:37 EST 2005</P> |
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<P>Last updated: Sat Jan 29 23:04:53 EST 2005</P> |
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<P>Current maintainer: Bruce Momjian (<A href= |
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"mailto:pgman@candle.pha.pa.us">pgman@candle.pha.pa.us</A>)<BR> |
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@ -82,8 +82,8 @@ |
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table, and a database?<BR> |
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<A href="#4.5">4.5</A>) How much database disk space is required |
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to store data from a typical text file?<BR> |
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<A href="#4.6">4.6</A>) My queries are slow or don't make use of |
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the indexes. Why?<BR> |
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<A href="#4.6">4.6</A>) Why are my queries slow? Why don't they |
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make use of indexes?<BR> |
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<A href="#4.7">4.7</A>) How do I see how the query optimizer is |
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evaluating my query?<BR> |
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<A href="#4.8">4.8</A>) What is an R-tree index?<BR> |
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@ -846,8 +846,8 @@ |
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<P><SMALL>NULL</SMALL>s are stored as bitmaps, so they |
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use very little space.</P> |
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<H4><A name="4.6">4.6</A>) My queries are slow or don't make use of |
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the indexes. Why?</H4> |
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<H4><A name="4.6">4.6</A>) Why are my queries slow? Why don't they |
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make use of indexes?</H4> |
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<P>Indexes are not automatically used by every query. Indexes are only |
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used if the table is larger than a minimum size, and the query |
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