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Add some instrumentation to the bgwriter, through the stats collector.

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New view pg_stat_bgwriter, and the functions required to build it.
This commit is contained in:
Magnus Hagander
2007-03-30 18:34:56 +00:00
parent f9ce21f94c
commit 335feca441
10 changed files with 349 additions and 12 deletions
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54
src/backend/utils/adt/pgstatfuncs.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/adt/pgstatfuncs.c,v 1.40 2007/03/16 17:57:36 mha Exp $
* $PostgreSQL: pgsql/src/backend/utils/adt/pgstatfuncs.c,v 1.41 2007/03/30 18:34:55 mha Exp $
*
*-------------------------------------------------------------------------
*/
@ -61,9 +61,19 @@ extern Datum pg_stat_get_db_tuples_inserted(PG_FUNCTION_ARGS);
extern Datum pg_stat_get_db_tuples_updated(PG_FUNCTION_ARGS);
extern Datum pg_stat_get_db_tuples_deleted(PG_FUNCTION_ARGS);
extern Datum pg_stat_get_bgwriter_timed_checkpoints(PG_FUNCTION_ARGS);
extern Datum pg_stat_get_bgwriter_requested_checkpoints(PG_FUNCTION_ARGS);
extern Datum pg_stat_get_bgwriter_buf_written_checkpoints(PG_FUNCTION_ARGS);
extern Datum pg_stat_get_bgwriter_buf_written_lru(PG_FUNCTION_ARGS);
extern Datum pg_stat_get_bgwriter_buf_written_all(PG_FUNCTION_ARGS);
extern Datum pg_stat_get_bgwriter_maxwritten_lru(PG_FUNCTION_ARGS);
extern Datum pg_stat_get_bgwriter_maxwritten_all(PG_FUNCTION_ARGS);
extern Datum pg_stat_clear_snapshot(PG_FUNCTION_ARGS);
extern Datum pg_stat_reset(PG_FUNCTION_ARGS);
/* Global bgwriter statistics, from bgwriter.c */
extern PgStat_MsgBgWriter bgwriterStats;
Datum
pg_stat_get_numscans(PG_FUNCTION_ARGS)
@ -756,6 +766,48 @@ pg_stat_get_db_tuples_deleted(PG_FUNCTION_ARGS)
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_bgwriter_timed_checkpoints(PG_FUNCTION_ARGS)
{
PG_RETURN_INT64(pgstat_fetch_global()->timed_checkpoints);
}
Datum
pg_stat_get_bgwriter_requested_checkpoints(PG_FUNCTION_ARGS)
{
PG_RETURN_INT64(pgstat_fetch_global()->requested_checkpoints);
}
Datum
pg_stat_get_bgwriter_buf_written_checkpoints(PG_FUNCTION_ARGS)
{
PG_RETURN_INT64(pgstat_fetch_global()->buf_written_checkpoints);
}
Datum
pg_stat_get_bgwriter_buf_written_lru(PG_FUNCTION_ARGS)
{
PG_RETURN_INT64(pgstat_fetch_global()->buf_written_lru);
}
Datum
pg_stat_get_bgwriter_buf_written_all(PG_FUNCTION_ARGS)
{
PG_RETURN_INT64(pgstat_fetch_global()->buf_written_all);
}
Datum
pg_stat_get_bgwriter_maxwritten_lru(PG_FUNCTION_ARGS)
{
PG_RETURN_INT64(pgstat_fetch_global()->maxwritten_lru);
}
Datum
pg_stat_get_bgwriter_maxwritten_all(PG_FUNCTION_ARGS)
{
PG_RETURN_INT64(pgstat_fetch_global()->maxwritten_all);
}
/* Discard the active statistics snapshot */
Datum