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 ------ REL_14_STABLE Details ------- https://git.postgresql.org/pg/commitdiff/b0f6bd48f35ddfe4195804eb8197f477c88da6d2 Modified Files -------------- src/backend/storage/ipc/procarray.c | 21 +++++++++++++++++++-- 1 file changed, 19 insertions(+), 2 deletions(-)
