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63 lines
2.2 KiB
C
63 lines
2.2 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) 2001-2011, 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_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_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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} BufferUsage;
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typedef enum InstrumentOption
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{
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INSTRUMENT_TIMER = 1 << 0, /* needs timer */
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INSTRUMENT_BUFFERS = 1 << 1, /* needs buffer usage */
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INSTRUMENT_ALL = 0x7FFFFFFF
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} InstrumentOption;
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typedef struct Instrumentation
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{
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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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bool needs_bufusage; /* TRUE if we need buffer usage */
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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 nloops; /* # of run cycles for this node */
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BufferUsage bufusage; /* Total buffer usage */
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} Instrumentation;
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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 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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#endif /* INSTRUMENT_H */
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