Обсуждение: pgsql: Correct StartupSUBTRANS for page wraparound

Correct StartupSUBTRANS for page wraparound

StartupSUBTRANS() incorrectly handled cases near the max pageid in the subtrans
data structure, which in some cases could lead to errors in startup for Hot
Standby.
This patch wraps the pageids correctly, avoiding any such errors.
Identified by exhaustive crash testing by Jeff Janes.

Jeff Janes

Branch
------
master

Details
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http://git.postgresql.org/pg/commitdiff/481725c0ba731b77fb32cadb12013373e378011a

Modified Files
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src/backend/access/transam/subtrans.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)