Renan Alves Fonseca writes:
> histogram. In my tests, not always, a small annoying difference shows
> up. Actually, it is really annoying, I'm struggling with it and I hope
> someone helps me to find the missing bits.
Finally, I've found out that this error has been triggered by my test
script.
Hi all,
in the scope of improving the autovacuum algorithm, this patch proposes
to maintain a histogram of *smallest prunable xid per page* for each
relation. It allows to estimate the number of pages that would
be pruned by vacuum for a given cutoff.
The *smallest prunable xid per page* is prune
