diff -rpcd a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
*** a/src/backend/postmaster/autovacuum.c	2014-07-22 04:12:31.000000000 +0900
--- b/src/backend/postmaster/autovacuum.c	2014-07-29 17:56:47.000000000 +0900
*************** avl_sigusr2_handler(SIGNAL_ARGS)
*** 1342,1347 ****
--- 1342,1349 ----
  {
  	int			save_errno = errno;
  
+ 	procsignal_sigusr2_handler(SIGUSR2);
+ 
  	got_SIGUSR2 = true;
  	if (MyProc)
  		SetLatch(&MyProc->procLatch);
*************** AutoVacWorkerMain(int argc, char *argv[]
*** 1496,1502 ****
  
  	pqsignal(SIGPIPE, SIG_IGN);
  	pqsignal(SIGUSR1, procsignal_sigusr1_handler);
! 	pqsignal(SIGUSR2, SIG_IGN);
  	pqsignal(SIGFPE, FloatExceptionHandler);
  	pqsignal(SIGCHLD, SIG_DFL);
  
--- 1498,1504 ----
  
  	pqsignal(SIGPIPE, SIG_IGN);
  	pqsignal(SIGUSR1, procsignal_sigusr1_handler);
! 	pqsignal(SIGUSR2, procsignal_sigusr2_handler);
  	pqsignal(SIGFPE, FloatExceptionHandler);
  	pqsignal(SIGCHLD, SIG_DFL);
  
diff -rpcd a/src/backend/storage/ipc/procsignal.c b/src/backend/storage/ipc/procsignal.c
*** a/src/backend/storage/ipc/procsignal.c	2014-07-22 04:12:31.000000000 +0900
--- b/src/backend/storage/ipc/procsignal.c	2014-07-29 17:56:47.000000000 +0900
*************** procsignal_sigusr1_handler(SIGNAL_ARGS)
*** 258,263 ****
--- 258,276 ----
  {
  	int			save_errno = errno;
  
+ 	latch_sigusr1_handler();
+ 
+ 	errno = save_errno;
+ }
+ 
+ /*
+  * procsignal_sigusr2_handler - handle SIGUSR2 signal.
+  */
+ void
+ procsignal_sigusr2_handler(SIGNAL_ARGS)
+ {
+ 	int			save_errno = errno;
+ 
  	if (CheckProcSignal(PROCSIG_CATCHUP_INTERRUPT))
  		HandleCatchupInterrupt();
  
*************** procsignal_sigusr1_handler(SIGNAL_ARGS)
*** 282,288 ****
  	if (CheckProcSignal(PROCSIG_RECOVERY_CONFLICT_BUFFERPIN))
  		RecoveryConflictInterrupt(PROCSIG_RECOVERY_CONFLICT_BUFFERPIN);
  
- 	latch_sigusr1_handler();
- 
  	errno = save_errno;
  }
--- 295,299 ----
diff -rpcd a/src/backend/tcop/postgres.c b/src/backend/tcop/postgres.c
*** a/src/backend/tcop/postgres.c	2014-07-22 04:12:31.000000000 +0900
--- b/src/backend/tcop/postgres.c	2014-07-29 17:56:47.000000000 +0900
*************** PostgresMain(int argc, char *argv[],
*** 3624,3630 ****
  		 */
  		pqsignal(SIGPIPE, SIG_IGN);
  		pqsignal(SIGUSR1, procsignal_sigusr1_handler);
! 		pqsignal(SIGUSR2, SIG_IGN);
  		pqsignal(SIGFPE, FloatExceptionHandler);
  
  		/*
--- 3624,3630 ----
  		 */
  		pqsignal(SIGPIPE, SIG_IGN);
  		pqsignal(SIGUSR1, procsignal_sigusr1_handler);
! 		pqsignal(SIGUSR2, procsignal_sigusr2_handler);
  		pqsignal(SIGFPE, FloatExceptionHandler);
  
  		/*
diff -rpcd a/src/include/storage/procsignal.h b/src/include/storage/procsignal.h
*** a/src/include/storage/procsignal.h	2014-07-22 04:12:31.000000000 +0900
--- b/src/include/storage/procsignal.h	2014-07-29 17:56:47.000000000 +0900
*************** extern int SendProcSignal(pid_t pid, Pro
*** 54,58 ****
--- 54,59 ----
  			   BackendId backendId);
  
  extern void procsignal_sigusr1_handler(SIGNAL_ARGS);
+ extern void procsignal_sigusr2_handler(SIGNAL_ARGS);
  
  #endif   /* PROCSIGNAL_H */