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| -rw-r--r-- | doc/FAQ | 4 | ||||
| -rw-r--r-- | doc/src/FAQ/FAQ.html | 4 |
2 files changed, 4 insertions, 4 deletions
@@ -1,7 +1,7 @@ Frequently Asked Questions (FAQ) for PostgreSQL - Last updated: Sun Mar 3 11:02:16 EST 2002 + Last updated: Sun Mar 3 13:35:39 EST 2002 Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us) @@ -707,7 +707,7 @@ 4.8) My queries are slow or don't make use of the indexes. Why? Indexes are not automatically used by every query. Indexes are only - used if the table is larger than a minimum size, and the index selects + used if the table is larger than a minimum size, and the query selects only a small percentage of the rows in the table. This is because the random disk access caused by an index scan is sometimes slower than a straight read through the table, or sequential scan. diff --git a/doc/src/FAQ/FAQ.html b/doc/src/FAQ/FAQ.html index dbb656686ea..7e6e97b1fcd 100644 --- a/doc/src/FAQ/FAQ.html +++ b/doc/src/FAQ/FAQ.html @@ -14,7 +14,7 @@ alink="#0000ff"> <H1>Frequently Asked Questions (FAQ) for PostgreSQL</H1> - <P>Last updated: Sun Mar 3 11:02:16 EST 2002</P> + <P>Last updated: Sun Mar 3 13:35:39 EST 2002</P> <P>Current maintainer: Bruce Momjian (<A href= "mailto:pgman@candle.pha.pa.us">pgman@candle.pha.pa.us</A>)<BR> @@ -903,7 +903,7 @@ <H4><A name="4.8">4.8</A>) My queries are slow or don't make use of the indexes. Why?</H4> Indexes are not automatically used by every query. Indexes are only - used if the table is larger than a minimum size, and the index + used if the table is larger than a minimum size, and the query selects only a small percentage of the rows in the table. This is because the random disk access caused by an index scan is sometimes slower than a straight read through the table, or sequential scan. |