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- /*-------------------------------------------------------------------------
- *
- * instrument.h
- * definitions for run-time statistics collection
- *
- *
- * Copyright (c) 2001-2016, 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 = 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 */
- /* 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;
- typedef struct WorkerInstrumentation
- {
- int num_workers; /* # of structures that follow */
- Instrumentation instrument[FLEXIBLE_ARRAY_MEMBER];
- } WorkerInstrumentation;
- extern PGDLLIMPORT BufferUsage pgBufferUsage;
- 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 *result);
- extern void InstrAccumParallelQuery(BufferUsage *result);
- #endif /* INSTRUMENT_H */
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