On Wednesday February 9 2005 3:13, Martijn van Oosterhout wrote: > > In general, the EXPLAIN ANALYZE output follows the planner > output as close as possible. If you look at the original query > posted, it showed an Index Scan costing 4.63..4.63 which means > the index scan is taking (on average) 4.63ms to return 1 row! > If it displayed as 4000 or something it would be a lot less > clear what was going on. > > Hope this helps,
Both replies help very much, thanks. Regarding 4.63ms to return a row, I know I/O speeds vary widely depending on conditions and hardware, but what would you say is a "red flag" value for the actual time to retrieve a row. I see that for most of the other times in this example, 0.01ms to 0.10ms is not unusual. Ed ---------------------------(end of broadcast)--------------------------- TIP 8: explain analyze is your friend
