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Set last written LSN for prefetched pages to avoid false invalidation of prefetch results

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Konstantin Knizhnik
2022-12-10 17:50:59 +02:00
parent 700a36ee6b
commit f6f87bb6f3
1 changed files with 8 additions and 0 deletions
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8
pgxn/neon/pagestore_smgr.c
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@@ -681,6 +681,14 @@ prefetch_do_request(PrefetchRequest *slot, bool *force_latest, XLogRecPtr *force
Assert(slot->my_ring_index == MyPState->ring_unused);
page_server->send((NeonRequest *) &request);
/* Remember request LSN for the prefetched page to avoid false pefetch invalidations */
SetLastWrittenLSNForBlock(
request.req.lsn,
slot->buftag.rnode,
slot->buftag.forkNum,
slot->buftag.blockNum
);
/* update prefetch state */
MyPState->n_requests_inflight += 1;
MyPState->n_unused -= 1;