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Postgres FD Implementation
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Abuhujair Javed
Postgres FD Implementation
Commits
5ab02fd1
Commit
5ab02fd1
authored
Mar 03, 2002
by
Bruce Momjian
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Update FAQ.
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View file @
5ab02fd1
Frequently Asked Questions (FAQ) for PostgreSQL
Last updated: Sun Mar 3 1
1:02:16
EST 2002
Last updated: Sun Mar 3 1
3:35:39
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.
...
...
doc/src/FAQ/FAQ.html
View file @
5ab02fd1
...
...
@@ -14,7 +14,7 @@
alink=
"#0000ff"
>
<H1>
Frequently Asked Questions (FAQ) for PostgreSQL
</H1>
<P>
Last updated: Sun Mar 3 1
1:02:16
EST 2002
</P>
<P>
Last updated: Sun Mar 3 1
3:35:39
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.
...
...
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