spatial index

hi - a very simple question from a newbie. Im tyring to outdo my colleagues Perl code (running on the same machine) for
spatialoperations (point-in-poly) but on a vanilla install of postgres 7.1 his perl is 20 times faster!! Ive no spatial
indexbuilt on the polygon but I cant get one built as it complains of a tuple_row error which  i assume relates to the
useof the default 8Kb block size - my question is - how do I rebuild with a bigger block size so as I can build an
rtreeon the poly? (or can someone give me some idea of how postgres spatial operations perform relative to other
solutions- Id like to employ postgres for a gazetteer service but I need to get the speed of response up....any
ideas/thoughtsappreciated) 

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James S Reid,
National Service Coordinator UKBORDERS
EDINA ,                                          Tel: +44 0131 651 1383
Data Library,                                  Fax: +44 0131 650 3308
Main Library,
Edinburgh University,
Edinburgh EH8 9LJ,              E-mail: James.Reid@ed.ac.uk
Scotland.                           Internet: edina.ed.ac.uk/ukborders/

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