have you tried both? the oracle eula prevents disclosing performance stats. pg allows user defined indexes to be added to kernel and integrated with optimizer

have you tried both? the oracle eula prevents disclosing performance stats. pg allows user defined indexes to be added to kernel and integrated with optimizer, creating some pretty sophisticated optimization techniques. we have the text search index easily handling 20mil+ pdfs with the rum index from postgrespro http://github.com/postgrespro/rum http://github.com/postgrespro/rum.