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Do flush only iof there are no in-glight prefetch requests

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Kosntantin Knizhnik
2025-07-21 13:29:38 +03:00
committed by Konstantin Knizhnik
parent b947deb07c
commit 588cb289d5
1 changed files with 11 additions and 7 deletions
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18
pgxn/neon/communicator.c
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@@ -470,14 +470,18 @@ communicator_prefetch_pump_state(void)
{
START_PREFETCH_RECEIVE_WORK();
/*
* Flush request to avoid requests pending for arbitrary long time,
* pinning LSN and holding GC at PS.
*/
if (!prefetch_flush_requests())
if (MyPState->ring_receive == MyPState->ring_flush && MyPState->ring_flush < MyPState->ring_unused)
{
END_PREFETCH_RECEIVE_WORK();
return;
/*
* Flush request to avoid requests pending for arbitrary long time,
* pinning LSN and holding GC at PS.
*/
if (!prefetch_flush_requests())
{
END_PREFETCH_RECEIVE_WORK();
return;
}
MyPState->ring_flush = MyPState->ring_unused;
}
while (MyPState->ring_receive != MyPState->ring_flush)
{