I am testing postgres 7.02 and ms-sql server as back ends to ms access. I
created identical databases containing three tables with about 1.2 , 1.6
and 3 million records each. The machine that is running SQL server is a
dual pIII zeon machine with raid 0 and 512 megs of ram. The postgres
machine is a dual pIII 500 with 256 megs of ram no raid but nice fast scsi
drive running red hat. Given this scenario I do expect postgres to be
slower then ms sql server. What I find very odd is that in some tasks it
actually faster (very slightly) like when doing simple select * from table
where primarykey=x. But when I do select * from very_big_table (I know it's
not such a good idea) it is insanely slow. On one test the table with 1.2
million records too 12 seconds in postgres and less then a second in sql
server!. I suspect that this has something to do with the ODBC driver
because I am having a hard time believing that postgres is that slow. I
suspect that the MS-SQL server ODBC driver is not actually pulling up ALL
the records but just a few at a time (and perhaps spinning off another
thread to fetch the rest). Can anybody confirm this?
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Tim Uckun
Mobile Intelligence Unit.
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"There are some who call me TIM?"
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