On Mon, Apr 13, 2020 at 4:16 PM Andres Freund <and...@anarazel.de> wrote: > I don't think so. If only one process does the splitting, the > exclusively locked section is just popping off a bunch of offsets of the > ring. And that could fairly easily be done with atomic ops (since what > we need is basically a single producer multiple consumer queue, which > can be done lock free fairly easily ). Whereas in the case of each > process doing the splitting, the exclusively locked part is splitting > along lines - which takes considerably longer than just popping off a > few offsets.
Hmm, that does seem believable. -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company
