Make autovacuum launcher more responsive to pg_log_backend_memory_contexts().

Previously when pg_log_backend_memory_contexts() sent the request to
the autovacuum launcher, it could take more than several seconds to
log its memory contexts. Because the function (HandleAutoVacLauncherInterrupts)
to process any new interrupts that autovacuum launcher received
didn't handle the request for logging of memory contexts. This commit changes
the function so that it handles the request, to make autovacuum launcher
more responsitve to pg_log_backend_memory_contexts().

Back-patch to v14 where pg_log_backend_memory_contexts() was added.

Author: Koyu Tanigawa
Reviewed-by: Bharath Rupireddy, Atsushi Torikoshi
Discussion: https://postgr.es/m/0aae3e074face409b35153451be5cc11@oss.nttdata.com

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index fefc07e1080bdfbcaacc8e072114484023828926..23ebac83d6eed8d8cd13d3ba1b53c316832ddbc2 100644 (file)
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -836,6 +836,10 @@ HandleAutoVacLauncherInterrupts(void)
    if (ProcSignalBarrierPending)
        ProcessProcSignalBarrier();
 
+   /* Perform logging of memory contexts of this process */
+   if (LogMemoryContextPending)
+       ProcessLogMemoryContextInterrupt();
+
    /* Process sinval catchup interrupts that happened while sleeping */
    ProcessCatchupInterrupt();
 }