On Sun, Aug 2, 2020 at 9:39 PM Kyotaro Horiguchi <horikyota.ntt@xxxxxxxxx> wrote: > All of the cited log lines seem suggesting relation with deleted btree > page items. As a possibility I can guess, that can happen if the pages > were flushed out during a vacuum after the last checkpoint and > full-page-writes didn't restored the page to the state before the > index-item deletion happened(that is, if full_page_writes were set to > off.). (If it found to be the cause, I'm not sure why that didn't > happen on 9.5.) There is also a Heap/HOT_UPDATE log line with similar errors. -- Peter Geoghegan
