diff --git a/src/backend/port/sysv_shmem.c b/src/backend/port/sysv_shmem.c
index 0399265c4dd..b80fcd58931 100644
--- a/src/backend/port/sysv_shmem.c
+++ b/src/backend/port/sysv_shmem.c
@@ -758,6 +758,8 @@ round_off_mapping_sizes_for_hugepages(MemoryMappingSizes *mapping, int hugepages
 	if (hugepagesize == 0)
 		return;
 
+	elog(WARNING, "shmem_reserved=%ld, shmem_req_size=%ld", mapping->shmem_reserved, mapping->shmem_req_size);
+
 	if (mapping->shmem_req_size % hugepagesize != 0)
 		mapping->shmem_req_size += add_size(mapping->shmem_req_size,
 											hugepagesize - (mapping->shmem_req_size % hugepagesize));
@@ -839,7 +841,7 @@ CreateAnonymousSegment(int segment_id, MemoryMappingSizes *mapping)
 				(errmsg("segment[%s]: could not create anonymous shared memory file: %m",
 						segname)));
 
-	elog(DEBUG1, "segment[%s]: mmap(%zu)", segname, mapping->shmem_req_size);
+	elog(WARNING, "segment[%s]: mmap(%zu)", segname, mapping->shmem_req_size);
 
 	/*
 	 * Reserve maximum required address space for future expansion of this
@@ -894,7 +896,6 @@ CreateAnonymousSegment(int segment_id, MemoryMappingSizes *mapping)
 	anonseg->addr = ptr;
 	anonseg->size = mapping->shmem_reserved;
 }
-
 /*
  * PrepareHugePages
  *
@@ -1418,6 +1419,29 @@ PGSharedMemoryDetach(void)
 	}
 }
 
+void
+JWPGSharedMemoryBuffersDetachTrick(void)
+{
+	AnonShmemSegment *sbseg = &AnonShmemSegs[BUFFERS_SHMEM_SEGMENT];
+	elog(WARNING, "unmapping s_b, but not closing fd(%d), from postmaster to accelerate fork()", sbseg->fd);
+	if(munmap(sbseg->addr, sbseg->size) != 0) {
+		ereport(FATAL, (errmsg("sb segment: could not unmap anonymous shared memory: %m")));
+	}
+}
+
+void
+JWPGSharedMemoryBuffersReattachTrick(void)
+{
+	AnonShmemSegment *sbseg = &AnonShmemSegs[BUFFERS_SHMEM_SEGMENT];
+
+	if(sbseg->fd == -1)
+		elog(PANIC, "children got wrong memfd fd");
+
+	sbseg->addr = mmap(NULL, sbseg->size, PROT_READ | PROT_WRITE, MAP_SHARED, sbseg->fd, 0);
+	if (sbseg->addr == MAP_FAILED)
+		elog(PANIC, "children failed mmap: %m");
+}
+
 void
 ShmemControlInit(void)
 {
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 80e3088fc7e..b59c82f6c1f 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -93,6 +93,7 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 	WritebackContext wb_context;
 
 	Assert(startup_data_len == 0);
+	elog(WARNING, "bwriter starting");
 
 	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index 85da8ac381a..43db2570a95 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -227,6 +227,9 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 			conn_timing.fork_end = GetCurrentTimestamp();
 		}
 
+		//elog(WARNING, "starting %d", pid);
+		JWPGSharedMemoryBuffersReattachTrick();
+
 		/* Close the postmaster's sockets */
 		ClosePostmasterPorts(child_type == B_LOGGER);
 
diff --git a/src/backend/storage/ipc/ipci.c b/src/backend/storage/ipc/ipci.c
index 1e92b0bcc5e..a18cb6227c5 100644
--- a/src/backend/storage/ipc/ipci.c
+++ b/src/backend/storage/ipc/ipci.c
@@ -257,7 +257,7 @@ CreateSharedMemoryAndSemaphores(void)
 		inhseg->UsedShmemSegID = i;
 
 		/* Compute the size of the shared-memory block */
-		elog(DEBUG3, "invoking IpcMemoryCreate(segment %s, size=%zu, reserved address space=%zu)",
+		elog(WARNING, "invoking IpcMemoryCreate(segment %s, size=%zu, reserved address space=%zu)",
 			 MappingName(i), mapping->shmem_req_size, mapping->shmem_reserved);
 
 		/*
@@ -289,6 +289,10 @@ CreateSharedMemoryAndSemaphores(void)
 	 */
 	if (shmem_startup_hook)
 		shmem_startup_hook();
+
+	/* JW HACK */
+	JWPGSharedMemoryBuffersDetachTrick();
+
 }
 
 /*
diff --git a/src/include/storage/pg_shmem.h b/src/include/storage/pg_shmem.h
index ac679259787..2160af8de1a 100644
--- a/src/include/storage/pg_shmem.h
+++ b/src/include/storage/pg_shmem.h
@@ -219,6 +219,8 @@ extern PGShmemHeader *PGSharedMemoryCreate(int segment_id, MemoryMappingSizes *m
 										   PGShmemHeader **shim);
 extern bool PGSharedMemoryIsInUse(unsigned long id1, unsigned long id2);
 extern void PGSharedMemoryDetach(void);
+extern void JWPGSharedMemoryBuffersDetachTrick(void);
+extern void JWPGSharedMemoryBuffersReattachTrick(void);
 extern void GetHugePageSize(Size *hugepagesize, int *mmap_flags,
 							int *memfd_flags);
 extern bool PGSharedMemoryResize(int segment_id, MemoryMappingSizes *mapping_sizes);