=?iso-8859-1?Q?Daniel_=C5kerud?= <zilch@home.se> writes:
> Anyone know what causes the signifacant performance decrease after 7 indexe=
> s?
I'd bet that somewhere around there, you are starting to see thrashing
of the buffer pool due to needing to touch too many different pages to
insert each tuple. What is your -B setting? If you increase it,
does the performance improve?
regards, tom lane