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Update FAQ_DEV.

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Bruce Momjian
2002-11-03 04:02:32 +00:00
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<H1>Developer's Frequently Asked Questions (FAQ) for
PostgreSQL</H1>
<P>Last updated: Tue Aug 13 16:41:02 EDT 2002</P>
<P>Last updated: Sat Nov 2 23:02:16 EST 2002</P>
<P>Current maintainer: Bruce Momjian (<A href=
"mailto:pgman@candle.pha.pa.us">pgman@candle.pha.pa.us</A>)<BR>
@ -39,7 +39,9 @@
<A href="#1.6">1.6</A>) What books are good for developers?<BR>
<A href="#1.7">1.7</A>) What is configure all about?<BR>
<A href="#1.8">1.8</A>) How do I add a new port?<BR>
<A href="#1.9">1.9</A>) Why don't we use threads in the backend?<BR>
<A href="#1.9">1.9</A>) Why don't you use threads/raw
devices/async-I/O, &amp;insert your favorite wizz-bang feature
here&amp;?<BR>
<A href="#1.10">1.10</A>) How are RPM's packaged?<BR>
<A href="#1.11">1.11</A>) How are CVS branches handled?<BR>
<A href="#1.12">1.12</A>) Where can I get a copy of the SQL
@ -381,10 +383,24 @@
handling. There is a <I>backend/port</I> directory if you need
special files for your OS.</P>
<H3><A name="1.9">1.9</A>) Why don't we use threads in the
backend?</H3>
<H3><A name="1.9">1.9</A>) Why don't you use threads/raw
devices/async-I/O, &amp;insert your favorite wizz-bang feature
here&amp;?</H3>
<P>There are several reasons threads are not used:</P>
<P>There is always a temptation to use the newest operating system
features as soon as they arrive. We resist that temptation.</P>
<P>First, we support 15+ operating systems, so any new feature has
to be well established before we will consider it. Second, most new
<I>wizz-bang</I> features don't provide <I>dramatic</I>
improvements. Third, the usually have some downside, such as
decreased reliability or additional code required. Therefore, we
don't rush to use new features but rather wait for the feature to be
established, then ask for testing to show that a measurable
improvement is possible.</P>
<P>As an example, threads are not currently used in the backend code
because:</P>
<UL>
<LI>Historically, threads were unsupported and buggy.</LI>
@ -397,6 +413,11 @@
<LI>The backend code would be more complex.</LI>
</UL>
<P>So, we are not "asleep at the switch" as they say with regard to
new features, it is just that we are cautious about their
adoption. The TODO list often contains links to discussions
showing our reasoning in these areas.</P>
<H3><A name="1.10">1.10</A>) How are RPM's packaged?</H3>
<P>This was written by Lamar Owen:</P>