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authorBruce Momjian <bruce@momjian.us>2001-02-15 22:21:23 +0000
committerBruce Momjian <bruce@momjian.us>2001-02-15 22:21:23 +0000
commitca71c6619086ac3b6e3787c2826363faeab02ac9 (patch)
treeaf8879b31e11eec911255db9d1e58deaaeb8b9ef /doc/src
parentbb1095c66d48b492236993ce793371e3236d051e (diff)
downloadpostgresql-ca71c6619086ac3b6e3787c2826363faeab02ac9.tar.gz
postgresql-ca71c6619086ac3b6e3787c2826363faeab02ac9.zip
Update FAQ.
Diffstat (limited to 'doc/src')
-rw-r--r--doc/src/FAQ/FAQ.html43
1 files changed, 32 insertions, 11 deletions
diff --git a/doc/src/FAQ/FAQ.html b/doc/src/FAQ/FAQ.html
index 59ad51047f8..61d955211ed 100644
--- a/doc/src/FAQ/FAQ.html
+++ b/doc/src/FAQ/FAQ.html
@@ -127,15 +127,17 @@
<SMALL>TID</SMALL>?<BR>
<A href="#4.18">4.18</A>) What is the meaning of some of the terms
used in PostgreSQL?<BR>
- <A href="#4.19">4.19</A>) How do I tell what PostgreSQL version I
+ <A href="#4.19">4.19</A>) Why do I get the error <I>"ERROR:
+ Memory exhausted in AllocSetAlloc()?"</I><BR>
+ <A href="#4.20">4.20</A>) How do I tell what PostgreSQL version I
am running? <BR>
- <A href="#4.20">4.20</A>) My large-object operations get
+ <A href="#4.21">4.21</A>) My large-object operations get
<I>invalid large obj descriptor.</I> Why?<BR>
- <A href="#4.21">4.21</A>) How do I create a column that will
+ <A href="#4.22">4.22</A>) How do I create a column that will
default to the current time?<BR>
- <A href="#4.22">4.22</A>) Why are my subqueries using
+ <A href="#4.23">4.23</A>) Why are my subqueries using
<CODE><SMALL>IN</SMALL></CODE> so slow?<BR>
- <A href="#4.23">4.23</A>) How do I perform an outer join?<BR>
+ <A href="#4.24">4.24</A>) How do I perform an outer join?<BR>
<CENTER>
@@ -147,7 +149,7 @@
and functions to PostgreSQL?<BR>
<A href="#5.3">5.3</A>) How do I write a C function to return a
tuple?<BR>
- <A href="#5.4">5.4</A>) I have changed a source file. Why does the
+ <A href="#5.4">5.3</A>) I have changed a source file. Why does the
recompile not see the change?<BR>
<HR>
@@ -1132,13 +1134,32 @@ BYTEA bytea variable-length byte array (null-safe)
<P>A list of general database terms can be found at: <A href=
"http://www.comptechnews.com/~reaster/dbdesign.html">http://www.comptechnews.com/~reaster/dbdesign.html</A></P>
- <H4><A name="4.19">4.19</A>) How do I tell what PostgreSQL version
+ <H4><A name="4.19">4.19</A>) Why do I get the error <I>"ERROR:
+ Memory exhausted in AllocSetAlloc()?"</I><BR>
+ </H4>
+
+ <P>It is possible you have run out of virtual memory on your
+ system, or your kernel has a low limit for certain resources. Try
+ this before starting the <I>postmaster:</I></P>
+<PRE>
+ ulimit -d 262144
+ limit datasize 256m
+</PRE>
+ Depending on your shell, only one of these may succeed, but it will
+ set your process data segment limit much higher and perhaps allow
+ the query to complete. This command applies to the current process,
+ and all subprocesses created after the command is run. If you are
+ having a problem with the <SMALL>SQL</SMALL> client because the
+ backend is returning too much data, try it before starting the
+ client.
+
+ <H4><A name="4.20">4.20</A>) How do I tell what PostgreSQL version
I am running?<BR>
</H4>
<P>From <I>psql,</I> type <CODE>select version();</CODE></P>
- <H4><A name="4.20">4.20</A>) My large-object operations get
+ <H4><A name="4.21">4.21</A>) My large-object operations get
<I>invalid large obj descriptor.</I> Why?<BR>
</H4>
@@ -1155,7 +1176,7 @@ BYTEA bytea variable-length byte array (null-safe)
<P>If you are using a client interface like <SMALL>ODBC</SMALL> you
may need to set <CODE>auto-commit off.</CODE></P>
- <H4><A name="4.21">4.21</A>) How do I create a column that will
+ <H4><A name="4.22">4.22</A>) How do I create a column that will
default to the current time?<BR>
</H4>
@@ -1165,7 +1186,7 @@ BYTEA bytea variable-length byte array (null-safe)
</CODE>
</PRE>
- <H4><A name="4.22">4.22</A>) Why are my subqueries using
+ <H4><A name="4.23">4.23</A>) Why are my subqueries using
<CODE><SMALL>IN</SMALL></CODE> so slow?<BR>
</H4>
@@ -1188,7 +1209,7 @@ BYTEA bytea variable-length byte array (null-safe)
</PRE>
We hope to fix this limitation in a future release.
- <H4><A name="4.23">4.23</A>) How do I perform an outer join?<BR>
+ <H4><A name="4.24">4.24</A>) How do I perform an outer join?<BR>
</H4>
<P>PostgreSQL 7.1 and later supports outer joins using the SQL