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Fix rare missing cancellations in Hot Standby.

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The machinery around XLOG_HEAP2_CLEANUP_INFO failed
to correctly pass through the necessary information
on latestRemovedXid, avoiding cancellations in some
infrequent concurrent update/cleanup scenarios.

Backpatchable fix to 9.0

Detailed bug report and fix by Noah Misch,
backpatchable version by me.
This commit is contained in:
Simon Riggs 2013-01-24 14:24:17 +00:00
parent 3cef2179e0
commit b544ea1a41
1 changed files with 1 additions and 1 deletions
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2
src/backend/access/heap/pruneheap.c
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@ -171,7 +171,7 @@ heap_page_prune(Relation relation, Buffer buffer, TransactionId OldestXmin,
* initialize the rest of our working state. * initialize the rest of our working state.
*/ */
prstate.new_prune_xid = InvalidTransactionId; prstate.new_prune_xid = InvalidTransactionId;
prstate.latestRemovedXid = InvalidTransactionId; prstate.latestRemovedXid = *latestRemovedXid;
prstate.nredirected = prstate.ndead = prstate.nunused = 0; prstate.nredirected = prstate.ndead = prstate.nunused = 0;
memset(prstate.marked, 0, sizeof(prstate.marked)); memset(prstate.marked, 0, sizeof(prstate.marked));