On Thu, Jul 13, 2017 at 10:02 AM, Peter Geoghegan <p...@bowt.ie> wrote: > The number of leaf pages at the left hand side of the leaf level seems > to be ~50 less than the unpatched 128 client case was the first time > around, which seems like a significant difference. I wonder why. Maybe > autovacuum ran at the right/wrong time this time around?
To reiterate what I say above: The number of leaf pages with dead items is 20 with this most recent run (128 clients, patched + unpatched). The leftmost internal page one level up from the leaf level contains 289 items. Whereas last time it was 353 items. That's a difference between having 20 hot/bloated leaf pages, and probably 84 hot/bloated pages, which I infer must have been the total number of bloated leaf pages within "result.txt". I think that something about all the "pgbench_index_*txt" tests are very different to what we see within "result.txt". It's as if there was a problem when "result.txt" ran, but that problem somehow didn't come up when you did new tests. -- Peter Geoghegan -- Sent via pgsql-hackers mailing list (email@example.com) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers