Richard Broersma Jr wrote:
--- Gregory Williamson <[EMAIL PROTECTED]> wrote:

A very low fill factor means that pages are
"sparse" and so inserts and updates are less likely to trigger massive b-tree rebalancings.

I take it that "massive b-tree rebalancings" could cause a problem with the 
performance of disk
writing though-put from UPDATEs and INSERTs?

Regards,
Richard Broersma Jr.
Precisely -- even if it can keep everything in RAM it can occupy quite a few cycles to rebalance a large b-tree. And eventually those changes do need to get written to disk so the next checkpoint (I think) will also have more work.
G

---------------------------(end of broadcast)---------------------------
TIP 4: Have you searched our list archives?

              http://archives.postgresql.org/

Reply via email to