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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 */