1 /*-------------------------------------------------------------------------
4 * Functions for accessing the statistics collector data
6 * Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
7 * Portions Copyright (c) 1994, Regents of the University of California
11 * $PostgreSQL: pgsql/src/backend/utils/adt/pgstatfuncs.c,v 1.52 2008/05/15 00:17:40 tgl Exp $
13 *-------------------------------------------------------------------------
18 #include "miscadmin.h"
20 #include "catalog/pg_type.h"
21 #include "utils/builtins.h"
22 #include "utils/inet.h"
25 /* bogus ... these externs should be in a header file */
26 extern Datum pg_stat_get_numscans(PG_FUNCTION_ARGS);
27 extern Datum pg_stat_get_tuples_returned(PG_FUNCTION_ARGS);
28 extern Datum pg_stat_get_tuples_fetched(PG_FUNCTION_ARGS);
29 extern Datum pg_stat_get_tuples_inserted(PG_FUNCTION_ARGS);
30 extern Datum pg_stat_get_tuples_updated(PG_FUNCTION_ARGS);
31 extern Datum pg_stat_get_tuples_deleted(PG_FUNCTION_ARGS);
32 extern Datum pg_stat_get_tuples_hot_updated(PG_FUNCTION_ARGS);
33 extern Datum pg_stat_get_live_tuples(PG_FUNCTION_ARGS);
34 extern Datum pg_stat_get_dead_tuples(PG_FUNCTION_ARGS);
35 extern Datum pg_stat_get_blocks_fetched(PG_FUNCTION_ARGS);
36 extern Datum pg_stat_get_blocks_hit(PG_FUNCTION_ARGS);
37 extern Datum pg_stat_get_last_vacuum_time(PG_FUNCTION_ARGS);
38 extern Datum pg_stat_get_last_autovacuum_time(PG_FUNCTION_ARGS);
39 extern Datum pg_stat_get_last_analyze_time(PG_FUNCTION_ARGS);
40 extern Datum pg_stat_get_last_autoanalyze_time(PG_FUNCTION_ARGS);
42 extern Datum pg_stat_get_function_calls(PG_FUNCTION_ARGS);
43 extern Datum pg_stat_get_function_time(PG_FUNCTION_ARGS);
44 extern Datum pg_stat_get_function_self_time(PG_FUNCTION_ARGS);
46 extern Datum pg_stat_get_backend_idset(PG_FUNCTION_ARGS);
47 extern Datum pg_stat_get_activity(PG_FUNCTION_ARGS);
48 extern Datum pg_backend_pid(PG_FUNCTION_ARGS);
49 extern Datum pg_stat_get_backend_pid(PG_FUNCTION_ARGS);
50 extern Datum pg_stat_get_backend_dbid(PG_FUNCTION_ARGS);
51 extern Datum pg_stat_get_backend_userid(PG_FUNCTION_ARGS);
52 extern Datum pg_stat_get_backend_activity(PG_FUNCTION_ARGS);
53 extern Datum pg_stat_get_backend_waiting(PG_FUNCTION_ARGS);
54 extern Datum pg_stat_get_backend_activity_start(PG_FUNCTION_ARGS);
55 extern Datum pg_stat_get_backend_xact_start(PG_FUNCTION_ARGS);
56 extern Datum pg_stat_get_backend_start(PG_FUNCTION_ARGS);
57 extern Datum pg_stat_get_backend_client_addr(PG_FUNCTION_ARGS);
58 extern Datum pg_stat_get_backend_client_port(PG_FUNCTION_ARGS);
60 extern Datum pg_stat_get_db_numbackends(PG_FUNCTION_ARGS);
61 extern Datum pg_stat_get_db_xact_commit(PG_FUNCTION_ARGS);
62 extern Datum pg_stat_get_db_xact_rollback(PG_FUNCTION_ARGS);
63 extern Datum pg_stat_get_db_blocks_fetched(PG_FUNCTION_ARGS);
64 extern Datum pg_stat_get_db_blocks_hit(PG_FUNCTION_ARGS);
65 extern Datum pg_stat_get_db_tuples_returned(PG_FUNCTION_ARGS);
66 extern Datum pg_stat_get_db_tuples_fetched(PG_FUNCTION_ARGS);
67 extern Datum pg_stat_get_db_tuples_inserted(PG_FUNCTION_ARGS);
68 extern Datum pg_stat_get_db_tuples_updated(PG_FUNCTION_ARGS);
69 extern Datum pg_stat_get_db_tuples_deleted(PG_FUNCTION_ARGS);
71 extern Datum pg_stat_get_bgwriter_timed_checkpoints(PG_FUNCTION_ARGS);
72 extern Datum pg_stat_get_bgwriter_requested_checkpoints(PG_FUNCTION_ARGS);
73 extern Datum pg_stat_get_bgwriter_buf_written_checkpoints(PG_FUNCTION_ARGS);
74 extern Datum pg_stat_get_bgwriter_buf_written_clean(PG_FUNCTION_ARGS);
75 extern Datum pg_stat_get_bgwriter_maxwritten_clean(PG_FUNCTION_ARGS);
76 extern Datum pg_stat_get_buf_written_backend(PG_FUNCTION_ARGS);
77 extern Datum pg_stat_get_buf_alloc(PG_FUNCTION_ARGS);
79 extern Datum pg_stat_clear_snapshot(PG_FUNCTION_ARGS);
80 extern Datum pg_stat_reset(PG_FUNCTION_ARGS);
82 /* Global bgwriter statistics, from bgwriter.c */
83 extern PgStat_MsgBgWriter bgwriterStats;
86 pg_stat_get_numscans(PG_FUNCTION_ARGS)
88 Oid relid = PG_GETARG_OID(0);
90 PgStat_StatTabEntry *tabentry;
92 if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
95 result = (int64) (tabentry->numscans);
97 PG_RETURN_INT64(result);
102 pg_stat_get_tuples_returned(PG_FUNCTION_ARGS)
104 Oid relid = PG_GETARG_OID(0);
106 PgStat_StatTabEntry *tabentry;
108 if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
111 result = (int64) (tabentry->tuples_returned);
113 PG_RETURN_INT64(result);
118 pg_stat_get_tuples_fetched(PG_FUNCTION_ARGS)
120 Oid relid = PG_GETARG_OID(0);
122 PgStat_StatTabEntry *tabentry;
124 if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
127 result = (int64) (tabentry->tuples_fetched);
129 PG_RETURN_INT64(result);
134 pg_stat_get_tuples_inserted(PG_FUNCTION_ARGS)
136 Oid relid = PG_GETARG_OID(0);
138 PgStat_StatTabEntry *tabentry;
140 if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
143 result = (int64) (tabentry->tuples_inserted);
145 PG_RETURN_INT64(result);
150 pg_stat_get_tuples_updated(PG_FUNCTION_ARGS)
152 Oid relid = PG_GETARG_OID(0);
154 PgStat_StatTabEntry *tabentry;
156 if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
159 result = (int64) (tabentry->tuples_updated);
161 PG_RETURN_INT64(result);
166 pg_stat_get_tuples_deleted(PG_FUNCTION_ARGS)
168 Oid relid = PG_GETARG_OID(0);
170 PgStat_StatTabEntry *tabentry;
172 if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
175 result = (int64) (tabentry->tuples_deleted);
177 PG_RETURN_INT64(result);
182 pg_stat_get_tuples_hot_updated(PG_FUNCTION_ARGS)
184 Oid relid = PG_GETARG_OID(0);
186 PgStat_StatTabEntry *tabentry;
188 if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
191 result = (int64) (tabentry->tuples_hot_updated);
193 PG_RETURN_INT64(result);
198 pg_stat_get_live_tuples(PG_FUNCTION_ARGS)
200 Oid relid = PG_GETARG_OID(0);
202 PgStat_StatTabEntry *tabentry;
204 if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
207 result = (int64) (tabentry->n_live_tuples);
209 PG_RETURN_INT64(result);
214 pg_stat_get_dead_tuples(PG_FUNCTION_ARGS)
216 Oid relid = PG_GETARG_OID(0);
218 PgStat_StatTabEntry *tabentry;
220 if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
223 result = (int64) (tabentry->n_dead_tuples);
225 PG_RETURN_INT64(result);
230 pg_stat_get_blocks_fetched(PG_FUNCTION_ARGS)
232 Oid relid = PG_GETARG_OID(0);
234 PgStat_StatTabEntry *tabentry;
236 if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
239 result = (int64) (tabentry->blocks_fetched);
241 PG_RETURN_INT64(result);
246 pg_stat_get_blocks_hit(PG_FUNCTION_ARGS)
248 Oid relid = PG_GETARG_OID(0);
250 PgStat_StatTabEntry *tabentry;
252 if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
255 result = (int64) (tabentry->blocks_hit);
257 PG_RETURN_INT64(result);
261 pg_stat_get_last_vacuum_time(PG_FUNCTION_ARGS)
263 Oid relid = PG_GETARG_OID(0);
265 PgStat_StatTabEntry *tabentry;
267 if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
270 result = tabentry->vacuum_timestamp;
275 PG_RETURN_TIMESTAMPTZ(result);
279 pg_stat_get_last_autovacuum_time(PG_FUNCTION_ARGS)
281 Oid relid = PG_GETARG_OID(0);
283 PgStat_StatTabEntry *tabentry;
285 if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
288 result = tabentry->autovac_vacuum_timestamp;
293 PG_RETURN_TIMESTAMPTZ(result);
297 pg_stat_get_last_analyze_time(PG_FUNCTION_ARGS)
299 Oid relid = PG_GETARG_OID(0);
301 PgStat_StatTabEntry *tabentry;
303 if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
306 result = tabentry->analyze_timestamp;
311 PG_RETURN_TIMESTAMPTZ(result);
315 pg_stat_get_last_autoanalyze_time(PG_FUNCTION_ARGS)
317 Oid relid = PG_GETARG_OID(0);
319 PgStat_StatTabEntry *tabentry;
321 if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
324 result = tabentry->autovac_analyze_timestamp;
329 PG_RETURN_TIMESTAMPTZ(result);
333 pg_stat_get_function_calls(PG_FUNCTION_ARGS)
335 Oid funcid = PG_GETARG_OID(0);
336 PgStat_StatFuncEntry *funcentry;
338 if ((funcentry = pgstat_fetch_stat_funcentry(funcid)) == NULL)
340 PG_RETURN_INT64(funcentry->f_numcalls);
344 pg_stat_get_function_time(PG_FUNCTION_ARGS)
346 Oid funcid = PG_GETARG_OID(0);
347 PgStat_StatFuncEntry *funcentry;
349 if ((funcentry = pgstat_fetch_stat_funcentry(funcid)) == NULL)
351 PG_RETURN_INT64(funcentry->f_time);
355 pg_stat_get_function_self_time(PG_FUNCTION_ARGS)
357 Oid funcid = PG_GETARG_OID(0);
358 PgStat_StatFuncEntry *funcentry;
360 if ((funcentry = pgstat_fetch_stat_funcentry(funcid)) == NULL)
362 PG_RETURN_INT64(funcentry->f_time_self);
366 pg_stat_get_backend_idset(PG_FUNCTION_ARGS)
368 FuncCallContext *funcctx;
372 /* stuff done only on the first call of the function */
373 if (SRF_IS_FIRSTCALL())
375 /* create a function context for cross-call persistence */
376 funcctx = SRF_FIRSTCALL_INIT();
378 fctx = MemoryContextAlloc(funcctx->multi_call_memory_ctx,
380 funcctx->user_fctx = fctx;
383 fctx[1] = pgstat_fetch_stat_numbackends();
386 /* stuff done on every call of the function */
387 funcctx = SRF_PERCALL_SETUP();
388 fctx = funcctx->user_fctx;
393 if (result <= fctx[1])
395 /* do when there is more left to send */
396 SRF_RETURN_NEXT(funcctx, Int32GetDatum(result));
400 /* do when there is no more left */
401 SRF_RETURN_DONE(funcctx);
406 pg_stat_get_activity(PG_FUNCTION_ARGS)
408 FuncCallContext *funcctx;
410 if (SRF_IS_FIRSTCALL())
412 MemoryContext oldcontext;
415 funcctx = SRF_FIRSTCALL_INIT();
417 oldcontext = MemoryContextSwitchTo(funcctx->multi_call_memory_ctx);
419 tupdesc = CreateTemplateTupleDesc(10, false);
420 TupleDescInitEntry(tupdesc, (AttrNumber) 1, "datid", OIDOID, -1, 0);
421 TupleDescInitEntry(tupdesc, (AttrNumber) 2, "procpid", INT4OID, -1, 0);
422 TupleDescInitEntry(tupdesc, (AttrNumber) 3, "usesysid", OIDOID, -1, 0);
423 TupleDescInitEntry(tupdesc, (AttrNumber) 4, "current_query", TEXTOID, -1, 0);
424 TupleDescInitEntry(tupdesc, (AttrNumber) 5, "waiting", BOOLOID, -1, 0);
425 TupleDescInitEntry(tupdesc, (AttrNumber) 6, "act_start", TIMESTAMPTZOID, -1, 0);
426 TupleDescInitEntry(tupdesc, (AttrNumber) 7, "query_start", TIMESTAMPTZOID, -1, 0);
427 TupleDescInitEntry(tupdesc, (AttrNumber) 8, "backend_start", TIMESTAMPTZOID, -1, 0);
428 TupleDescInitEntry(tupdesc, (AttrNumber) 9, "client_addr", INETOID, -1, 0);
429 TupleDescInitEntry(tupdesc, (AttrNumber) 10, "client_port", INT4OID, -1, 0);
431 funcctx->tuple_desc = BlessTupleDesc(tupdesc);
433 funcctx->user_fctx = palloc0(sizeof(int));
436 /* Get all backends */
437 funcctx->max_calls = pgstat_fetch_stat_numbackends();
442 * Get one backend - locate by pid.
444 * We lookup the backend early, so we can return zero rows if it doesn't
445 * exist, instead of returning a single row full of NULLs.
447 int pid = PG_GETARG_INT32(0);
449 int n = pgstat_fetch_stat_numbackends();
451 for (i = 1; i <= n; i++)
453 PgBackendStatus *be = pgstat_fetch_stat_beentry(i);
456 if (be->st_procpid == pid)
458 *(int *)(funcctx->user_fctx) = i;
464 if (*(int *)(funcctx->user_fctx) == 0)
465 /* Pid not found, return zero rows */
466 funcctx->max_calls = 0;
468 funcctx->max_calls = 1;
471 MemoryContextSwitchTo(oldcontext);
474 /* stuff done on every call of the function */
475 funcctx = SRF_PERCALL_SETUP();
477 if (funcctx->call_cntr < funcctx->max_calls)
483 PgBackendStatus *beentry;
484 SockAddr zero_clientaddr;
486 MemSet(values, 0, sizeof(values));
487 MemSet(nulls, 0, sizeof(nulls));
489 if (*(int *)(funcctx->user_fctx) > 0)
490 /* Get specific pid slot */
491 beentry = pgstat_fetch_stat_beentry(*(int *)(funcctx->user_fctx));
493 /* Get the next one in the list */
494 beentry = pgstat_fetch_stat_beentry(funcctx->call_cntr+1); /* 1-based index */
499 for (i = 0; i < sizeof(nulls)/sizeof(nulls[0]); i++)
503 values[3] = CStringGetTextDatum("<backend information not available>");
505 tuple = heap_form_tuple(funcctx->tuple_desc, values, nulls);
506 SRF_RETURN_NEXT(funcctx, HeapTupleGetDatum(tuple));
509 /* Values available to all callers */
510 values[0] = ObjectIdGetDatum(beentry->st_databaseid);
511 values[1] = Int32GetDatum(beentry->st_procpid);
512 values[2] = ObjectIdGetDatum(beentry->st_userid);
514 /* Values only available to same user or superuser */
515 if (superuser() || beentry->st_userid == GetUserId())
517 if (*(beentry->st_activity) == '\0')
519 values[3] = CStringGetTextDatum("<command string not enabled>");
523 values[3] = CStringGetTextDatum(beentry->st_activity);
526 values[4] = BoolGetDatum(beentry->st_waiting);
528 if (beentry->st_xact_start_timestamp != 0)
529 values[5] = TimestampTzGetDatum(beentry->st_xact_start_timestamp);
533 if (beentry->st_activity_start_timestamp != 0)
534 values[6] = TimestampTzGetDatum(beentry->st_activity_start_timestamp);
538 if (beentry->st_proc_start_timestamp != 0)
539 values[7] = TimestampTzGetDatum(beentry->st_proc_start_timestamp);
543 /* A zeroed client addr means we don't know */
544 memset(&zero_clientaddr, 0, sizeof(zero_clientaddr));
545 if (memcmp(&(beentry->st_clientaddr), &zero_clientaddr,
546 sizeof(zero_clientaddr) == 0))
553 if (beentry->st_clientaddr.addr.ss_family == AF_INET
555 || beentry->st_clientaddr.addr.ss_family == AF_INET6
559 char remote_host[NI_MAXHOST];
560 char remote_port[NI_MAXSERV];
563 remote_host[0] = '\0';
564 remote_port[0] = '\0';
565 ret = pg_getnameinfo_all(&beentry->st_clientaddr.addr,
566 beentry->st_clientaddr.salen,
567 remote_host, sizeof(remote_host),
568 remote_port, sizeof(remote_port),
569 NI_NUMERICHOST | NI_NUMERICSERV);
577 clean_ipv6_addr(beentry->st_clientaddr.addr.ss_family, remote_host);
578 values[8] = DirectFunctionCall1(inet_in,
579 CStringGetDatum(remote_host));
580 values[9] = Int32GetDatum(atoi(remote_port));
583 else if (beentry->st_clientaddr.addr.ss_family == AF_UNIX)
586 * Unix sockets always reports NULL for host and -1 for port, so it's
587 * possible to tell the difference to connections we have no
588 * permissions to view, or with errors.
591 values[9] = DatumGetInt32(-1);
595 /* Unknown address type, should never happen */
603 /* No permissions to view data about this session */
604 values[3] = CStringGetTextDatum("<insufficient privilege>");
613 tuple = heap_form_tuple(funcctx->tuple_desc, values, nulls);
615 SRF_RETURN_NEXT(funcctx, HeapTupleGetDatum(tuple));
620 SRF_RETURN_DONE(funcctx);
626 pg_backend_pid(PG_FUNCTION_ARGS)
628 PG_RETURN_INT32(MyProcPid);
633 pg_stat_get_backend_pid(PG_FUNCTION_ARGS)
635 int32 beid = PG_GETARG_INT32(0);
636 PgBackendStatus *beentry;
638 if ((beentry = pgstat_fetch_stat_beentry(beid)) == NULL)
641 PG_RETURN_INT32(beentry->st_procpid);
646 pg_stat_get_backend_dbid(PG_FUNCTION_ARGS)
648 int32 beid = PG_GETARG_INT32(0);
649 PgBackendStatus *beentry;
651 if ((beentry = pgstat_fetch_stat_beentry(beid)) == NULL)
654 PG_RETURN_OID(beentry->st_databaseid);
659 pg_stat_get_backend_userid(PG_FUNCTION_ARGS)
661 int32 beid = PG_GETARG_INT32(0);
662 PgBackendStatus *beentry;
664 if ((beentry = pgstat_fetch_stat_beentry(beid)) == NULL)
667 PG_RETURN_OID(beentry->st_userid);
672 pg_stat_get_backend_activity(PG_FUNCTION_ARGS)
674 int32 beid = PG_GETARG_INT32(0);
675 PgBackendStatus *beentry;
676 const char *activity;
678 if ((beentry = pgstat_fetch_stat_beentry(beid)) == NULL)
679 activity = "<backend information not available>";
680 else if (!superuser() && beentry->st_userid != GetUserId())
681 activity = "<insufficient privilege>";
682 else if (*(beentry->st_activity) == '\0')
683 activity = "<command string not enabled>";
685 activity = beentry->st_activity;
687 PG_RETURN_TEXT_P(cstring_to_text(activity));
692 pg_stat_get_backend_waiting(PG_FUNCTION_ARGS)
694 int32 beid = PG_GETARG_INT32(0);
696 PgBackendStatus *beentry;
698 if ((beentry = pgstat_fetch_stat_beentry(beid)) == NULL)
701 if (!superuser() && beentry->st_userid != GetUserId())
704 result = beentry->st_waiting;
706 PG_RETURN_BOOL(result);
711 pg_stat_get_backend_activity_start(PG_FUNCTION_ARGS)
713 int32 beid = PG_GETARG_INT32(0);
715 PgBackendStatus *beentry;
717 if ((beentry = pgstat_fetch_stat_beentry(beid)) == NULL)
720 if (!superuser() && beentry->st_userid != GetUserId())
723 result = beentry->st_activity_start_timestamp;
726 * No time recorded for start of current query -- this is the case if the
727 * user hasn't enabled query-level stats collection.
732 PG_RETURN_TIMESTAMPTZ(result);
737 pg_stat_get_backend_xact_start(PG_FUNCTION_ARGS)
739 int32 beid = PG_GETARG_INT32(0);
741 PgBackendStatus *beentry;
743 if ((beentry = pgstat_fetch_stat_beentry(beid)) == NULL)
746 if (!superuser() && beentry->st_userid != GetUserId())
749 result = beentry->st_xact_start_timestamp;
751 if (result == 0) /* not in a transaction */
754 PG_RETURN_TIMESTAMPTZ(result);
759 pg_stat_get_backend_start(PG_FUNCTION_ARGS)
761 int32 beid = PG_GETARG_INT32(0);
763 PgBackendStatus *beentry;
765 if ((beentry = pgstat_fetch_stat_beentry(beid)) == NULL)
768 if (!superuser() && beentry->st_userid != GetUserId())
771 result = beentry->st_proc_start_timestamp;
773 if (result == 0) /* probably can't happen? */
776 PG_RETURN_TIMESTAMPTZ(result);
781 pg_stat_get_backend_client_addr(PG_FUNCTION_ARGS)
783 int32 beid = PG_GETARG_INT32(0);
784 PgBackendStatus *beentry;
785 SockAddr zero_clientaddr;
786 char remote_host[NI_MAXHOST];
789 if ((beentry = pgstat_fetch_stat_beentry(beid)) == NULL)
792 if (!superuser() && beentry->st_userid != GetUserId())
795 /* A zeroed client addr means we don't know */
796 memset(&zero_clientaddr, 0, sizeof(zero_clientaddr));
797 if (memcmp(&(beentry->st_clientaddr), &zero_clientaddr,
798 sizeof(zero_clientaddr) == 0))
801 switch (beentry->st_clientaddr.addr.ss_family)
812 remote_host[0] = '\0';
813 ret = pg_getnameinfo_all(&beentry->st_clientaddr.addr,
814 beentry->st_clientaddr.salen,
815 remote_host, sizeof(remote_host),
817 NI_NUMERICHOST | NI_NUMERICSERV);
821 clean_ipv6_addr(beentry->st_clientaddr.addr.ss_family, remote_host);
823 PG_RETURN_INET_P(DirectFunctionCall1(inet_in,
824 CStringGetDatum(remote_host)));
828 pg_stat_get_backend_client_port(PG_FUNCTION_ARGS)
830 int32 beid = PG_GETARG_INT32(0);
831 PgBackendStatus *beentry;
832 SockAddr zero_clientaddr;
833 char remote_port[NI_MAXSERV];
836 if ((beentry = pgstat_fetch_stat_beentry(beid)) == NULL)
839 if (!superuser() && beentry->st_userid != GetUserId())
842 /* A zeroed client addr means we don't know */
843 memset(&zero_clientaddr, 0, sizeof(zero_clientaddr));
844 if (memcmp(&(beentry->st_clientaddr), &zero_clientaddr,
845 sizeof(zero_clientaddr) == 0))
848 switch (beentry->st_clientaddr.addr.ss_family)
861 remote_port[0] = '\0';
862 ret = pg_getnameinfo_all(&beentry->st_clientaddr.addr,
863 beentry->st_clientaddr.salen,
865 remote_port, sizeof(remote_port),
866 NI_NUMERICHOST | NI_NUMERICSERV);
870 PG_RETURN_DATUM(DirectFunctionCall1(int4in,
871 CStringGetDatum(remote_port)));
876 pg_stat_get_db_numbackends(PG_FUNCTION_ARGS)
878 Oid dbid = PG_GETARG_OID(0);
880 int tot_backends = pgstat_fetch_stat_numbackends();
884 for (beid = 1; beid <= tot_backends; beid++)
886 PgBackendStatus *beentry = pgstat_fetch_stat_beentry(beid);
888 if (beentry && beentry->st_databaseid == dbid)
892 PG_RETURN_INT32(result);
897 pg_stat_get_db_xact_commit(PG_FUNCTION_ARGS)
899 Oid dbid = PG_GETARG_OID(0);
901 PgStat_StatDBEntry *dbentry;
903 if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
906 result = (int64) (dbentry->n_xact_commit);
908 PG_RETURN_INT64(result);
913 pg_stat_get_db_xact_rollback(PG_FUNCTION_ARGS)
915 Oid dbid = PG_GETARG_OID(0);
917 PgStat_StatDBEntry *dbentry;
919 if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
922 result = (int64) (dbentry->n_xact_rollback);
924 PG_RETURN_INT64(result);
929 pg_stat_get_db_blocks_fetched(PG_FUNCTION_ARGS)
931 Oid dbid = PG_GETARG_OID(0);
933 PgStat_StatDBEntry *dbentry;
935 if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
938 result = (int64) (dbentry->n_blocks_fetched);
940 PG_RETURN_INT64(result);
945 pg_stat_get_db_blocks_hit(PG_FUNCTION_ARGS)
947 Oid dbid = PG_GETARG_OID(0);
949 PgStat_StatDBEntry *dbentry;
951 if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
954 result = (int64) (dbentry->n_blocks_hit);
956 PG_RETURN_INT64(result);
961 pg_stat_get_db_tuples_returned(PG_FUNCTION_ARGS)
963 Oid dbid = PG_GETARG_OID(0);
965 PgStat_StatDBEntry *dbentry;
967 if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
970 result = (int64) (dbentry->n_tuples_returned);
972 PG_RETURN_INT64(result);
977 pg_stat_get_db_tuples_fetched(PG_FUNCTION_ARGS)
979 Oid dbid = PG_GETARG_OID(0);
981 PgStat_StatDBEntry *dbentry;
983 if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
986 result = (int64) (dbentry->n_tuples_fetched);
988 PG_RETURN_INT64(result);
993 pg_stat_get_db_tuples_inserted(PG_FUNCTION_ARGS)
995 Oid dbid = PG_GETARG_OID(0);
997 PgStat_StatDBEntry *dbentry;
999 if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
1002 result = (int64) (dbentry->n_tuples_inserted);
1004 PG_RETURN_INT64(result);
1009 pg_stat_get_db_tuples_updated(PG_FUNCTION_ARGS)
1011 Oid dbid = PG_GETARG_OID(0);
1013 PgStat_StatDBEntry *dbentry;
1015 if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
1018 result = (int64) (dbentry->n_tuples_updated);
1020 PG_RETURN_INT64(result);
1025 pg_stat_get_db_tuples_deleted(PG_FUNCTION_ARGS)
1027 Oid dbid = PG_GETARG_OID(0);
1029 PgStat_StatDBEntry *dbentry;
1031 if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
1034 result = (int64) (dbentry->n_tuples_deleted);
1036 PG_RETURN_INT64(result);
1040 pg_stat_get_bgwriter_timed_checkpoints(PG_FUNCTION_ARGS)
1042 PG_RETURN_INT64(pgstat_fetch_global()->timed_checkpoints);
1046 pg_stat_get_bgwriter_requested_checkpoints(PG_FUNCTION_ARGS)
1048 PG_RETURN_INT64(pgstat_fetch_global()->requested_checkpoints);
1052 pg_stat_get_bgwriter_buf_written_checkpoints(PG_FUNCTION_ARGS)
1054 PG_RETURN_INT64(pgstat_fetch_global()->buf_written_checkpoints);
1058 pg_stat_get_bgwriter_buf_written_clean(PG_FUNCTION_ARGS)
1060 PG_RETURN_INT64(pgstat_fetch_global()->buf_written_clean);
1064 pg_stat_get_bgwriter_maxwritten_clean(PG_FUNCTION_ARGS)
1066 PG_RETURN_INT64(pgstat_fetch_global()->maxwritten_clean);
1070 pg_stat_get_buf_written_backend(PG_FUNCTION_ARGS)
1072 PG_RETURN_INT64(pgstat_fetch_global()->buf_written_backend);
1076 pg_stat_get_buf_alloc(PG_FUNCTION_ARGS)
1078 PG_RETURN_INT64(pgstat_fetch_global()->buf_alloc);
1082 /* Discard the active statistics snapshot */
1084 pg_stat_clear_snapshot(PG_FUNCTION_ARGS)
1086 pgstat_clear_snapshot();
1092 /* Reset all counters for the current database */
1094 pg_stat_reset(PG_FUNCTION_ARGS)
1096 pgstat_reset_counters();