86 lines
3.3 KiB
C
86 lines
3.3 KiB
C
/*-------------------------------------------------------------------------
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*
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* instrument.h
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* definitions for run-time statistics collection
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*
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*
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* Copyright (c) 2001-2019, PostgreSQL Global Development Group
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*
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* src/include/executor/instrument.h
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef INSTRUMENT_H
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#define INSTRUMENT_H
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#include "portability/instr_time.h"
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typedef struct BufferUsage
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{
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long shared_blks_hit; /* # of shared buffer hits */
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long shared_blks_read; /* # of shared disk blocks read */
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long shared_blks_dirtied; /* # of shared blocks dirtied */
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long shared_blks_written; /* # of shared disk blocks written */
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long local_blks_hit; /* # of local buffer hits */
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long local_blks_read; /* # of local disk blocks read */
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long local_blks_dirtied; /* # of shared blocks dirtied */
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long local_blks_written; /* # of local disk blocks written */
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long temp_blks_read; /* # of temp blocks read */
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long temp_blks_written; /* # of temp blocks written */
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instr_time blk_read_time; /* time spent reading */
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instr_time blk_write_time; /* time spent writing */
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} BufferUsage;
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/* Flag bits included in InstrAlloc's instrument_options bitmask */
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typedef enum InstrumentOption
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{
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INSTRUMENT_TIMER = 1 << 0, /* needs timer (and row counts) */
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INSTRUMENT_BUFFERS = 1 << 1, /* needs buffer usage */
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INSTRUMENT_ROWS = 1 << 2, /* needs row count */
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INSTRUMENT_ALL = PG_INT32_MAX
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} InstrumentOption;
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typedef struct Instrumentation
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{
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/* Parameters set at node creation: */
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bool need_timer; /* true if we need timer data */
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bool need_bufusage; /* true if we need buffer usage data */
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/* Info about current plan cycle: */
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bool running; /* true if we've completed first tuple */
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instr_time starttime; /* Start time of current iteration of node */
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instr_time counter; /* Accumulated runtime for this node */
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double firsttuple; /* Time for first tuple of this cycle */
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double tuplecount; /* Tuples emitted so far this cycle */
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BufferUsage bufusage_start; /* Buffer usage at start */
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/* Accumulated statistics across all completed cycles: */
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double startup; /* Total startup time (in seconds) */
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double total; /* Total total time (in seconds) */
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double ntuples; /* Total tuples produced */
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double ntuples2; /* Secondary node-specific tuple counter */
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double nloops; /* # of run cycles for this node */
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double nfiltered1; /* # tuples removed by scanqual or joinqual */
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double nfiltered2; /* # tuples removed by "other" quals */
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BufferUsage bufusage; /* Total buffer usage */
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} Instrumentation;
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typedef struct WorkerInstrumentation
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{
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int num_workers; /* # of structures that follow */
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Instrumentation instrument[FLEXIBLE_ARRAY_MEMBER];
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} WorkerInstrumentation;
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extern PGDLLIMPORT BufferUsage pgBufferUsage;
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extern Instrumentation *InstrAlloc(int n, int instrument_options);
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extern void InstrInit(Instrumentation *instr, int instrument_options);
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extern void InstrStartNode(Instrumentation *instr);
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extern void InstrStopNode(Instrumentation *instr, double nTuples);
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extern void InstrEndLoop(Instrumentation *instr);
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extern void InstrAggNode(Instrumentation *dst, Instrumentation *add);
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extern void InstrStartParallelQuery(void);
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extern void InstrEndParallelQuery(BufferUsage *result);
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extern void InstrAccumParallelQuery(BufferUsage *result);
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#endif /* INSTRUMENT_H */
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