On Fri, Aug 12, 2016 at 1:40 AM, Mark Kirkwood <mark.kirkw...@catalyst.net.nz> wrote: > After examining the benchmark design - I see we are probably not being > helped by the repeated insertion of keys all of form 'userxxxxxxx' leading > to some page splitting.
But shouldn't that still leave us with a 75% full index, rather than slightly over 50% full? The leaf pages start at 50%, grow to 100%, then split back to 50%, then grow back to 100%. So the average should be about 75%. > However your index rebuild gets you from 5 to 3 GB - does that really help > performance significantly? It can make a big difference, depending on how much RAM you have. Cheers, Jeff -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
