diff --git a/src/backend/utils/adt/selfuncs.c b/src/backend/utils/adt/selfuncs.c
index 5ee37759..ead891a2 100644
--- a/src/backend/utils/adt/selfuncs.c
+++ b/src/backend/utils/adt/selfuncs.c
@@ -139,6 +139,8 @@
 #include "utils/timestamp.h"
 #include "utils/typcache.h"
 
+#include "portability/instr_time.h"
+
 #define DEFAULT_PAGE_CPU_MULTIPLIER 50.0
 
 /*
@@ -374,6 +376,10 @@ var_eq_const(VariableStatData *vardata, Oid oproid, Oid collation,
 	bool		isdefault;
 	Oid			opfuncoid;
 
+	instr_time	comparestart,
+				compareuration;
+
+	INSTR_TIME_SET_CURRENT(comparestart);
 	/*
 	 * If the constant is NULL, assume operator is strict and return zero, ie,
 	 * operator will never return TRUE.  (It's zero even for a negator op.)
@@ -426,6 +432,8 @@ var_eq_const(VariableStatData *vardata, Oid oproid, Oid collation,
 			LOCAL_FCINFO(fcinfo, 2);
 			FmgrInfo	eqproc;
 
+			
+
 			fmgr_info(opfuncoid, &eqproc);
 
 			/*
@@ -527,6 +535,18 @@ var_eq_const(VariableStatData *vardata, Oid oproid, Oid collation,
 	/* result should be in range, but make sure... */
 	CLAMP_PROBABILITY(selec);
 
+	{
+		double		plantime;
+		
+		INSTR_TIME_SET_CURRENT(compareuration);
+		INSTR_TIME_SUBTRACT(compareuration, comparestart);
+		plantime = INSTR_TIME_GET_DOUBLE(compareuration);
+
+			elog(NOTICE, "var_eq_cosnt() : %.*f", 
+				 3, 1000.0 * plantime);
+
+	}
+
 	return selec;
 }
 
@@ -812,6 +832,11 @@ mcv_selectivity(VariableStatData *vardata, FmgrInfo *opproc, Oid collation,
 	AttStatsSlot sslot;
 	int			i;
 
+		instr_time	comparestart,
+				compareuration;
+
+	INSTR_TIME_SET_CURRENT(comparestart);
+
 	mcv_selec = 0.0;
 	sumcommon = 0.0;
 
@@ -858,6 +883,20 @@ mcv_selectivity(VariableStatData *vardata, FmgrInfo *opproc, Oid collation,
 	}
 
 	*sumcommonp = sumcommon;
+
+	{
+		double		plantime;
+		
+		INSTR_TIME_SET_CURRENT(compareuration);
+		INSTR_TIME_SUBTRACT(compareuration, comparestart);
+		plantime = INSTR_TIME_GET_DOUBLE(compareuration);
+
+
+			elog(NOTICE, "mcv_selectivity(opproc->fn_oid=%d) : %.*f",
+				 opproc->fn_oid, 3, 1000.0 * plantime);
+	
+	}
+
 	return mcv_selec;
 }
 
@@ -2419,6 +2458,12 @@ eqjoinsel(PG_FUNCTION_ARGS)
 	bool		join_is_reversed;
 	RelOptInfo *inner_rel;
 
+		/* just for perf test*/
+	instr_time	comparestart,
+				compareuration;
+
+	INSTR_TIME_SET_CURRENT(comparestart);
+
 	get_join_variables(root, args, sjinfo,
 					   &vardata1, &vardata2, &join_is_reversed);
 
@@ -2476,7 +2521,8 @@ eqjoinsel(PG_FUNCTION_ARGS)
 		 * If the MCV lists are long enough to justify hashing, try to look up
 		 * hash functions for the join operator.
 		 */
-		if ((sslot1.nvalues + sslot2.nvalues) >= EQJOINSEL_MCV_HASH_THRESHOLD)
+		/* if ((sslot1.nvalues + sslot2.nvalues) >= EQJOINSEL_MCV_HASH_THRESHOLD) */ 
+		  if ((sslot1.nvalues + sslot2.nvalues) >= 202) /* just for perf test*/
 			(void) get_op_hash_functions_ext(operator,
 											 exprType((Node *) linitial(args)),
 											 &hashLeft, &hashRight);
@@ -2574,6 +2620,16 @@ eqjoinsel(PG_FUNCTION_ARGS)
 
 	CLAMP_PROBABILITY(selec);
 
+	{
+		double		plantime;
+		
+		INSTR_TIME_SET_CURRENT(compareuration);
+		INSTR_TIME_SUBTRACT(compareuration, comparestart);
+		plantime = INSTR_TIME_GET_DOUBLE(compareuration);		
+
+		elog(NOTICE, "eqjoinsel() : %.*f", 3, 1000.0 * plantime);
+	}
+
 	PG_RETURN_FLOAT8((float8) selec);
 }
 
@@ -3347,6 +3403,11 @@ mergejoinscansel(PlannerInfo *root, Node *clause,
 				rightmin,
 				rightmax;
 	double		selec;
+			/* just for perf test*/
+	instr_time	comparestart,
+				compareuration;
+
+	INSTR_TIME_SET_CURRENT(comparestart);
 
 	/* Set default results if we can't figure anything out. */
 	/* XXX should default "start" fraction be a bit more than 0? */
@@ -3615,6 +3676,16 @@ mergejoinscansel(PlannerInfo *root, Node *clause,
 		*rightend = 1.0;
 	}
 
+		{
+		double		plantime;
+		
+		INSTR_TIME_SET_CURRENT(compareuration);
+		INSTR_TIME_SUBTRACT(compareuration, comparestart);
+		plantime = INSTR_TIME_GET_DOUBLE(compareuration);		
+
+		elog(NOTICE, "mergejoinscansel() : %.*f", 3, 1000.0 * plantime);
+	}
+
 fail:
 	ReleaseVariableStats(leftvar);
 	ReleaseVariableStats(rightvar);