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Use an LWLock instead of a spinlock in waitlsn.c

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This should prevent busy-waiting when number of waiting processes is high.

Discussion: https://postgr.es/m/202404030658.hhj3vfxeyhft%40alvherre.pgsql
Author: Alvaro Herrera
This commit is contained in:
Alexander Korotkov
2024-04-07 00:31:43 +03:00
parent 1577081e96
commit 25f42429e2
4 changed files with 10 additions and 12 deletions
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src/backend/utils/activity/wait_event_names.txt
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@@ -345,6 +345,7 @@ WALSummarizer "Waiting to read or update WAL summarization state."
DSMRegistry "Waiting to read or update the dynamic shared memory registry."
InjectionPoint "Waiting to read or update information related to injection points."
SerialControl "Waiting to read or update shared <filename>pg_serial</filename> state."
WaitLSN "Waiting to read or update shared Wait-for-LSN state."
#
# END OF PREDEFINED LWLOCKS (DO NOT CHANGE THIS LINE)