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Postgres FD Implementation
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Abuhujair Javed
Postgres FD Implementation
Commits
bbefccec
Commit
bbefccec
authored
Jan 30, 2005
by
Bruce Momjian
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Reword index/slow query item.
parent
97052bc9
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doc/FAQ
View file @
bbefccec
Frequently Asked Questions (FAQ) for PostgreSQL
Last updated: Sat Jan 29 23:0
2:37
EST 2005
Last updated: Sat Jan 29 23:0
4:53
EST 2005
Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us)
...
...
@@ -56,7 +56,7 @@
4.4) What is the maximum size for a row, a table, and a database?
4.5) How much database disk space is required to store data from a
typical text file?
4.6)
My queries are slow or don't make use of the indexes. Why
?
4.6)
Why are my queries slow? Why don't they make use of indexes
?
4.7) How do I see how the query optimizer is evaluating my query?
4.8) What is an R-tree index?
4.9) What is the Genetic Query Optimizer?
...
...
@@ -683,7 +683,7 @@ log_*
NULLs are stored as bitmaps, so they use very little space.
4.6)
My queries are slow or don't make use of the indexes. Why
?
4.6)
Why are my queries slow? Why don't they make use of indexes
?
Indexes are not automatically used by every query. Indexes are only
used if the table is larger than a minimum size, and the query selects
...
...
doc/src/FAQ/FAQ.html
View file @
bbefccec
...
...
@@ -10,7 +10,7 @@
alink=
"#0000ff"
>
<H1>
Frequently Asked Questions (FAQ) for PostgreSQL
</H1>
<P>
Last updated: Sat Jan 29 23:0
2:37
EST 2005
</P>
<P>
Last updated: Sat Jan 29 23:0
4:53
EST 2005
</P>
<P>
Current maintainer: Bruce Momjian (
<A
href=
"mailto:pgman@candle.pha.pa.us"
>
pgman@candle.pha.pa.us
</A>
)
<BR>
...
...
@@ -82,8 +82,8 @@
table, and a database?
<BR>
<A
href=
"#4.5"
>
4.5
</A>
) How much database disk space is required
to store data from a typical text file?
<BR>
<A
href=
"#4.6"
>
4.6
</A>
)
My queries are slow or don't make use of
the indexes. Why
?
<BR>
<A
href=
"#4.6"
>
4.6
</A>
)
Why are my queries slow? Why don't they
make use of indexes
?
<BR>
<A
href=
"#4.7"
>
4.7
</A>
) How do I see how the query optimizer is
evaluating my query?
<BR>
<A
href=
"#4.8"
>
4.8
</A>
) What is an R-tree index?
<BR>
...
...
@@ -846,8 +846,8 @@
<P><SMALL>
NULL
</SMALL>
s are stored as bitmaps, so they
use very little space.
</P>
<H4><A
name=
"4.6"
>
4.6
</A>
)
My queries are slow or don't make use of
the indexes. Why
?
</H4>
<H4><A
name=
"4.6"
>
4.6
</A>
)
Why are my queries slow? Why don't they
make use of indexes
?
</H4>
<P>
Indexes are not automatically used by every query. Indexes are only
used if the table is larger than a minimum size, and the query
...
...
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