we are new to Postgres and we are evaluating Postgres 7.4 on MacOS X as an alternative to FrontBase 3.6.27.

From the available features Postgres is the choice #1.

We have some tests to check the performance and FrontBase is about 10 times faster than Postgres. We already played around with explain analyse select. It seems that for large tables Postgres does not use an index. We often see the scan message in the query plan. Were can we find more hints about tuning the performance? The database is about 350 MB large, without BLOB's. We tried to define every important index for the selects but it seems that something still goes wrong: FrontBase needs about 23 seconds for about 4300 selects and Postgres needs 4 minutes, 34 seconds.

Any clues?

regards David

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