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/*-------------------------------------------------------------------------
*
* instrument.h
* definitions for run-time statistics collection
*
*
* Copyright (c) 2001-2020, 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;
typedef struct WalUsage
{
long wal_records; /* # of WAL records produced */
long wal_fpi; /* # of WAL full page images produced */
uint64 wal_bytes; /* size of WAL records produced */
} WalUsage;
/* 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_WAL = 1 << 3, /* needs WAL usage */
INSTRUMENT_ALL = PG_INT32_MAX
} 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 */
bool need_walusage; /* true if we need WAL 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; /* # of tuples emitted so far this cycle */
BufferUsage bufusage_start; /* buffer usage at start */
WalUsage walusage_start; /* WAL usage at start */
/* Accumulated statistics across all completed cycles: */
double startup; /* total startup time (in seconds) */
double total; /* total time (in seconds) */
double ntuples; /* total tuples produced */
double ntuples2; /* secondary node-specific tuple counter */
double nloops; /* # of run cycles for this node */
double nfiltered1; /* # of tuples removed by scanqual or joinqual */
double nfiltered2; /* # of tuples removed by "other" quals */
BufferUsage bufusage; /* total buffer usage */
WalUsage walusage; /* total WAL usage */
} Instrumentation;
typedef struct WorkerInstrumentation
{
int num_workers; /* # of structures that follow */
Instrumentation instrument[FLEXIBLE_ARRAY_MEMBER];
} WorkerInstrumentation;
extern PGDLLIMPORT BufferUsage pgBufferUsage;
extern PGDLLIMPORT WalUsage pgWalUsage;
extern Instrumentation *InstrAlloc(int n, int instrument_options);
extern void InstrInit(Instrumentation *instr, int instrument_options);
extern void InstrStartNode(Instrumentation *instr);
extern void InstrStopNode(Instrumentation *instr, double nTuples);
extern void InstrEndLoop(Instrumentation *instr);
extern void InstrAggNode(Instrumentation *dst, Instrumentation *add);
extern void InstrStartParallelQuery(void);
extern void InstrEndParallelQuery(BufferUsage *bufusage, WalUsage *walusage);
extern void InstrAccumParallelQuery(BufferUsage *bufusage, WalUsage *walusage);
extern void BufferUsageAccumDiff(BufferUsage *dst,
const BufferUsage *add, const BufferUsage *sub);
extern void WalUsageAccumDiff(WalUsage *dst, const WalUsage *add,
const WalUsage *sub);
#endif /* INSTRUMENT_H */
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