Thread: pgsql: Ignore nextOid when replaying an ONLINE checkpoint.
Ignore nextOid when replaying an ONLINE checkpoint. The nextOid value is from the start of the checkpoint and may well be stale compared to values from more recent XLOG_NEXTOID records. Previously, we adopted it anyway, allowing the OID counter to go backwards during a crash. While this should be harmless, it contributed to the severity of the bug fixed in commit 0408e1ed5, by allowing duplicate TOAST OIDs to be assigned immediately following a crash. Without this error, that issue would only have arisen when TOAST objects just younger than a multiple of 2^32 OIDs were deleted and then not vacuumed in time to avoid a conflict. Pavan Deolasee Discussion: https://postgr.es/m/CABOikdOgWT2hHkYG3Wwo2cyZJq2zfs1FH0FgX-=h4OLosXHf9w@mail.gmail.com Branch ------ REL9_4_STABLE Details ------- https://git.postgresql.org/pg/commitdiff/6943fb9275a50f3a9d177da1a06ea387bf490ead Modified Files -------------- src/backend/access/transam/xlog.c | 19 ++++++++++++++----- 1 file changed, 14 insertions(+), 5 deletions(-)