Reset lastOverflowedXid on standby when needed Currently, lastOverflowedXid is never reset. It's just adjusted on new transactions known to be overflowed. But if there are no overflowed transactions for a long time, snapshots could be mistakenly marked as suboverflowed due to wraparound.
This commit fixes this issue by resetting lastOverflowedXid when needed altogether with KnownAssignedXids. Backpatch to all supported versions. Reported-by: Stan Hu Discussion: https://postgr.es/m/CAMBWrQ%3DFp5UAsU_nATY7EMY7NHczG4-DTDU%3DmCvBQZAQ6wa2xQ%40mail.gmail.com Author: Kyotaro Horiguchi, Alexander Korotkov Reviewed-by: Stan Hu, Simon Riggs, Nikolay Samokhvalov, Andrey Borodin, Dmitry Dolgov Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/05e6e78c1840d07154a4b52092178a2d1ad39445 Modified Files -------------- src/backend/storage/ipc/procarray.c | 21 +++++++++++++++++++-- 1 file changed, 19 insertions(+), 2 deletions(-)
