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At end of recovery, reset all sinval-managed caches.

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An inplace update's invalidation messages are part of its transaction's
commit record.  However, the update survives even if its transaction
aborts or we stop recovery before replaying its transaction commit.
After recovery, a backend that started in recovery could update the row
without incorporating the inplace update.  That could result in a table
with an index, yet relhasindex=f.  That is a source of index corruption.

This bulk invalidation avoids the functional consequences.  A future
change can fix the !RecoveryInProgress() scenario without changing the
WAL format.  Back-patch to v17 - v12 (all supported versions).  v18 will
instead add invalidations to WAL.

Discussion: https://postgr.es/m/20240618152349.7f.nmisch@google.com
This commit is contained in:
Noah Misch
2024-10-25 06:51:06 -07:00
parent d34ffbaa10
commit 3baf804b72
3 changed files with 67 additions and 0 deletions
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src/include/storage/sinvaladt.h
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@@ -37,6 +37,7 @@ extern void BackendIdGetTransactionIds(int backendID, TransactionId *xid, Transa
extern void SIInsertDataEntries(const SharedInvalidationMessage *data, int n);
extern int SIGetDataEntries(SharedInvalidationMessage *data, int datasize);
extern void SICleanupQueue(bool callerHasWriteLock, int minFree);
extern void SIResetAll(void);
extern LocalTransactionId GetNextLocalTransactionId(void);