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Expose track_iotiming data via the statistics collector.

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Ants Aasma's original patch to add timing information for buffer I/O
requests exposed this data at the relation level, which was judged too
costly.  I've here exposed it at the database level instead.
This commit is contained in:
Robert Haas
2012-04-05 11:37:31 -04:00
parent 05dbd4a773
commit 644828908f
10 changed files with 99 additions and 9 deletions
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14
src/include/pgstat.h
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@ -233,6 +233,8 @@ typedef struct PgStat_MsgTabstat
int m_nentries;
int m_xact_commit;
int m_xact_rollback;
PgStat_Counter m_block_time_read;
PgStat_Counter m_block_time_write;
PgStat_TableEntry m_entry[PGSTAT_NUM_TABENTRIES];
} PgStat_MsgTabstat;
@ -536,6 +538,8 @@ typedef struct PgStat_StatDBEntry
PgStat_Counter n_temp_files;
PgStat_Counter n_temp_bytes;
PgStat_Counter n_deadlocks;
PgStat_Counter n_block_time_read; /* times in microseconds */
PgStat_Counter n_block_time_write;
TimestampTz stat_reset_timestamp;
@ -721,6 +725,12 @@ extern char *pgstat_stat_filename;
*/
extern PgStat_MsgBgWriter BgWriterStats;
/*
* Updated by pgstat_count_time_* macros.
*/
extern PgStat_Counter pgStatBlockTimeRead;
extern PgStat_Counter pgStatBlockTimeWrite;
/* ----------
* Functions called from postmaster
* ----------
@ -816,6 +826,10 @@ extern void pgstat_initstats(Relation rel);
if ((rel)->pgstat_info != NULL) \
(rel)->pgstat_info->t_counts.t_blocks_hit++; \
} while (0)
#define pgstat_count_buffer_read_time(n) \
pgStatBlockTimeRead += (n);
#define pgstat_count_buffer_write_time(n) \
pgStatBlockTimeWrite += (n);
extern void pgstat_count_heap_insert(Relation rel, int n);
extern void pgstat_count_heap_update(Relation rel, bool hot);