I have the following doubts.
1. Does postgres create an index on every primary key? Usually, queries
are performed against a table on the primary key, so, an index on it
will be very useful.
2. If 'm executing a complex query and it takes 10 seconds to return the
results -- it takes 10 seconds to execute the next time also. I'm
wondering if there's any kind of caching that can be enabled -- so, the
next time it takes <10 seconds to return the results.
Thanks
Dhanaraj
