/*-------------------------------------------------------------------------
 *
 * instrument.h
 *	  definitions for run-time statistics collection
 *
 *
 * Portions Copyright (c) 2006-2009, Greenplum inc
 * Copyright (c) 2001-2009, PostgreSQL Global Development Group
 *
 * $PostgreSQL: pgsql/src/include/executor/instrument.h,v 1.16 2006/06/09 19:30:56 tgl Exp $
 *
 *-------------------------------------------------------------------------
 */
#ifndef INSTRUMENT_H
#define INSTRUMENT_H

#include "portability/instr_time.h"

struct CdbExplain_NodeSummary;          /* private def in cdb/cdbexplain.c */


typedef struct Instrumentation
{
	/* Info about current plan cycle: */
	bool		running;		/* TRUE if we've completed first tuple */
	instr_time	starttime;		/* Start time of current iteration of node */
	instr_time	counter;		/* Accumulated runtime for this node */
	double		firsttuple;		/* Time for first tuple of this cycle */
	double		tuplecount;		/* Tuples emitted so far this cycle */
	/* Accumulated statistics across all completed cycles: */
	double		startup;		/* Max row Total startup time (in seconds) */
	double		startupLast;		/* Slowest Total startup time (in seconds) */
	double		total;			/* Max row Total total time (in seconds) */
	double		totalLast;			/* Slowest Total total time (in seconds) */
	double		ntuples;		/* Total tuples produced */
	double		nloops;			/* # of run cycles for this node */
    double		execmemused;    /* CDB: executor memory used (bytes) */
    double		workmemused;    /* CDB: work_mem actually used (bytes) */
    double		workmemwanted;  /* CDB: work_mem to avoid scratch i/o (bytes) */
	instr_time	firststart;		/* CDB: Start time of first iteration of node */
	instr_time	firststartLast;		/* CDB: Start time of first iteration of node which is slowest*/
	bool		workfileReused; /* TRUE if cached workfiles reused in this node */
	bool		workfileCreated;/* TRUE if workfiles are created in this node */
	int		numPartScanned; /* Number of part tables scanned */
    struct CdbExplain_NodeSummary  *cdbNodeSummary; /* stats from all qExecs */
} Instrumentation;

extern Instrumentation *InstrAlloc(int n);
extern void InstrStartNode(Instrumentation *instr);
extern void InstrStopNode(Instrumentation *instr, double nTuples);
extern void InstrEndLoop(Instrumentation *instr);

#endif   /* INSTRUMENT_H */