""John Surnow"" <surnow@xxxxxxxxxx> wrote > Does this mean that read access is not concurrent, or write access, or > both? For old GiST, you can have several connections read-*only* at the same time, but write/write or read/write is unsafe. GiST in 8.1 is concurrent safe already. Regards, Qingqing ---------------------------(end of broadcast)--------------------------- TIP 6: explain analyze is your friend