$ php plot_graph.php 2; date
16:27:59: Script Starting
16:27:59: executing Query
16:28:01: Number of results:53068
16:28:01: Fetching Results
16:28:03: Freeing result set
16:28:03: Closing DB connection
16:28:03: Done
16:28:03: Exiting
Thu May 10 16:28:22 BST 2007
Looks like this is the only one you need to worry about.
Does it happen consistently (ie every time) ? Maybe the server was under load and it took a while to release the resources or something.
If it does happen consistently maybe you can use gdb or something to work out what/where/why.
--
Postgresql & php tutorials
http://www.designmagick.com/