| From: | Alexander Korotkov <akorotkov(at)postgresql(dot)org> |
|---|---|
| To: | pgsql-committers(at)lists(dot)postgresql(dot)org |
| Subject: | pgsql: Reset lastOverflowedXid on standby when needed |
| Date: | 2021-11-06 16:14:15 |
| Message-ID: | E1mjOKd-0000Kg-1g@gemulon.postgresql.org |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-committers |
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(-)
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Alexander Korotkov | 2021-11-06 16:14:21 | pgsql: Reset lastOverflowedXid on standby when needed |
| Previous Message | Alexander Korotkov | 2021-11-06 16:13:47 | pgsql: Reset lastOverflowedXid on standby when needed |