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mallopt(M_ARENA_MAX, 4) #119

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Merged
serprex merged 2 commits into from
Jul 14, 2026
Merged

mallopt(M_ARENA_MAX, 4) #119

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mallopt(M_ARENA_MAX, 4)
serprex Jul 14, 2026
62e45bd
DEBUG1
serprex Jul 14, 2026
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9 changes: 9 additions & 0 deletions src/worker/bgworker.c
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Original file line number Diff line number Diff line change
Expand Up @@ -38,6 +38,9 @@
#include "queue/shmem.h"

#include <signal.h>
#ifdef __GLIBC__
#include <malloc.h>
#endif

#include "config/guc.h"
#include "export/stats_exporter.h"
Expand Down Expand Up @@ -182,6 +185,12 @@ static void RunExportCycle(uint32 wait_event) {
}

void PschBgworkerMain(Datum main_arg pg_attribute_unused()) {
#ifdef __GLIBC__
// Set before any gRPC/Arrow threads are created; cap glibc malloc arenas to reduce virtual memory usage.
if (mallopt(M_ARENA_MAX, 4) == 0) {
elog(DEBUG1, "pg_stat_ch: mallopt(M_ARENA_MAX, 4) failed");
}
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#endif
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SetupSignalHandlers();
BackgroundWorkerUnblockSignals();
BackgroundWorkerInitializeConnection("postgres", NULL, 0);
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