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Commitd96398d

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Restructure debug FAQ entry.
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‎doc/FAQ

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Original file line numberDiff line numberDiff line change
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Frequently Asked Questions (FAQ) for PostgreSQL
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Last updated: Mon Jan 3115:40:24 EST 2005
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Last updated: Mon Jan 3117:57:02 EST 2005
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Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us)
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@@ -383,24 +383,20 @@
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3.4) What debugging features are available?
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PostgreSQL has several features that report status information that
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can be valuable for debugging purposes.
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There are many log_* server configuration variables that enable
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printing of query and process statistics which can be very useful for
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debugging and performance measurements.
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First, by running configure with the --enable-cassert option, many
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assert()s monitor the progress of the backend and halt the program
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when something unexpected occurs.
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The following detailed debug instructions are to be used to provide
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more detailed information for server developers debugging a problem
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Both postmaster and postgres have several debug options available.
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First, whenever you start postmaster, make sure you send the standard
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output and error to a log file, like:
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cd /usr/local/pgsql
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./bin/postmaster >server.log 2>&1 &
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This will put a server.log file in the top-level PostgreSQL directory.
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This file contains useful information about problems or errors
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encountered by the server. Postmaster has a -d option that allows even
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more detailed information to be reported. The -d option takes a number
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that specifies the debug level. Be warned that high debug level values
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It is also possible to debug the server if it isn't operating
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properly. First, by running configure with the --enable-cassert
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option, many assert()s monitor the progress of the backend and halt
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the program when something unexpected occurs.
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The postmaster has a -d option that allows even more detailed
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information to be reported. The -d option takes a number that
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specifies the debug level. Be warned that high debug level values
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generate large log files.
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If postmaster is not running, you can actually run the postgres
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process with the debugger, set any breakpoints, and continue through
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the startup sequence.
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There are several log_* server configuration variables that enable
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printing of process statistics which can be very useful for debugging
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and performance measurements.
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You can also compile with profiling to see what functions are taking
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execution time. The backend profile files will be deposited in the
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pgsql/data/base/dbname directory. The client profile file will be put

‎doc/src/FAQ/FAQ.html

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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: Mon Jan 3115:40:24 EST 2005</P>
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<P>Last updated: Mon Jan 3117:57:02 EST 2005</P>
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<P>Current maintainer: Bruce Momjian (<Ahref=
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"mailto:pgman@candle.pha.pa.us">pgman@candle.pha.pa.us</A>)
@@ -519,29 +519,23 @@ <H4><A name="3.3">3.3</A>) How do I tune the database engine for
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<H4><Aname="3.4">3.4</A>) What debugging features are
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available?</H4>
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<P>PostgreSQL has several features that report status information
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that can be valuable for debugging purposes.</P>
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<P>There are many<CODE>log_*</CODE> server configuration variables
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that enable printing of query and process statistics which can be
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very useful for debugging and performance measurements.</P>
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<P>First, by running<I>configure</I> with the --enable-cassert
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<P><B>The following detailed debug instructions are to be used to
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provide more detailed information for server developers debugging a
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problem<B></P>
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<P>It is also possible to debug the server if it isn't operating
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properly. First, by running<I>configure</I> with the --enable-cassert
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option, many<I>assert()</I>s monitor the progress of the backend
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and halt the program when something unexpected occurs.</P>
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<P>Both<I>postmaster</I> and<I>postgres</I> have several debug
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options available. First, whenever you start<I>postmaster</I>,
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make sure you send the standard output and error to a log file,
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like:</P>
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<PRE>
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cd /usr/local/pgsql
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./bin/postmaster &gt;server.log 2&gt;&amp;1 &amp;
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</PRE>
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<P>This will put a server.log file in the top-level PostgreSQL
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directory. This file contains useful information about problems or
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errors encountered by the server.<I>Postmaster</I> has a<I>-d</I>
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option that allows even more detailed information to be reported.
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The<I>-d</I> option takes a number that specifies the debug level.
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Be warned that high debug level values generate large log
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files.</P>
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The<I>postmaster</I> has a<I>-d</I> option that allows even more
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detailed information to be reported. The<I>-d</I> option takes a
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number that specifies the debug level. Be warned that high debug
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level values generate large log files.</P>
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<P>If<I>postmaster</I> is not running, you can actually run the
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<I>postgres</I> backend from the command line, and type your
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the debugger, set any breakpoints, and continue through the startup
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sequence.</P>
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<P>There are several<CODE>log_*</CODE> server configuration variables
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that enable printing of process statistics which can be very useful
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for debugging and performance measurements.</P>
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<P>You can also compile with profiling to see what functions are
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taking execution time. The backend profile files will be deposited
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in the<I>pgsql/data/base/dbname</I> directory. The client profile

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