[ZDP] BackTalk to Document The Zope Book (2.6 Edition)/Relational Database Connectivity

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A comment to the paragraph below was recently added via http://zope.org/Documentation/Books/ZopeBook/2_6Edition/RelationalDatabases.stx#2-3

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    Zope can connect to all the above-listed database systems; however,
    you should be satisfied that the database is running and operating
    in a satisfactory way on its own before attempting to connect it to
    Zope.  An exception to this policy is Gadfly, which is included with
    Zope and requires no setup.

      % Anonymous User - Mar. 25, 2004 6:57 am:
       It seems Gadfly isn't thread safe. I learned this the hard way when using it to count page views on a
       2-processor machine. This caused regular crashes when two requests came in simultaneously and tried to modify
       the database, resulting in Zope getting stuck in a state that required manual intervention (kill -9) to bring
       it up again.
       Too bad, because it's nice to be able to rely on a database that always comes with Zope.