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/*-------------------------------------------------------------------------
*
* instrument.h
* definitions for run-time statistics collection
*
*
* Copyright (c) 2001-2012, PostgreSQL Global Development Group
*
* src/include/executor/instrument.h
*
*-------------------------------------------------------------------------
*/
#ifndef INSTRUMENT_H
#define INSTRUMENT_H
#include "portability/instr_time.h"
typedef struct BufferUsage
{
long shared_blks_hit; /* # of shared buffer hits */
long shared_blks_read; /* # of shared disk blocks read */
long shared_blks_dirtied; /* # of shared blocks dirtied */
long shared_blks_written; /* # of shared disk blocks written */
long local_blks_hit; /* # of local buffer hits */
long local_blks_read; /* # of local disk blocks read */
long local_blks_dirtied; /* # of shared blocks dirtied */
long local_blks_written; /* # of local disk blocks written */
long temp_blks_read; /* # of temp blocks read */
long temp_blks_written; /* # of temp blocks written */
instr_time blk_read_time; /* time spent reading */
instr_time blk_write_time; /* time spent writing */
} BufferUsage;
/* Flag bits included in InstrAlloc's instrument_options bitmask */
typedef enum InstrumentOption
{
INSTRUMENT_TIMER = 1 << 0, /* needs timer (and row counts) */
INSTRUMENT_BUFFERS = 1 << 1, /* needs buffer usage */
INSTRUMENT_ROWS = 1 << 2, /* needs row count */
INSTRUMENT_ALL = 0x7FFFFFFF
} InstrumentOption;
typedef struct Instrumentation
{
/* Parameters set at node creation: */
bool need_timer; /* TRUE if we need timer data */
bool need_bufusage; /* TRUE if we need buffer usage data */
/* 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 */
BufferUsage bufusage_start; /* Buffer usage at start */
/* Accumulated statistics across all completed cycles: */
double startup; /* Total startup time (in seconds) */
double total; /* Total total time (in seconds) */
double ntuples; /* Total tuples produced */
double nloops; /* # of run cycles for this node */
double nfiltered1; /* # tuples removed by scanqual or joinqual */
double nfiltered2; /* # tuples removed by "other" quals */
BufferUsage bufusage; /* Total buffer usage */
} Instrumentation;
extern PGDLLIMPORT BufferUsage pgBufferUsage;
extern Instrumentation *InstrAlloc(int n, int instrument_options);
extern void InstrStartNode(Instrumentation *instr);
extern void InstrStopNode(Instrumentation *instr, double nTuples);
extern void InstrEndLoop(Instrumentation *instr);
#endif /* INSTRUMENT_H */
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