Skip to content

P
Postgres FD Implementation
Commit 335feca4 authored by Magnus Hagander's avatar Magnus Hagander
Browse files
Options

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

New view pg_stat_bgwriter, and the functions required to build it.
parent f9ce21f9
Hide whitespace changes
Inline Side-by-side
Showing with 349 additions and 12 deletions
doc/src/sgml/monitoring.sgml
View file @ 335feca4
<!-- $PostgreSQL: pgsql/doc/src/sgml/monitoring.sgml,v 1.47 2007/03/16 17:57:35 mha Exp $ -->
<!-- $PostgreSQL: pgsql/doc/src/sgml/monitoring.sgml,v 1.48 2007/03/30 18:34:55 mha Exp $ -->
<chapter id="monitoring">
<title>Monitoring Database Activity</title>
......@@ -260,6 +260,16 @@ postgres: <replaceable>user</> <replaceable>database</> <replaceable>host</> <re
</entry>
</row>
<row>
<entry><structname>pg_stat_bgwriter</></entry>
<entry>One row only, showing cluster-wide statistics from the
background writer: number of scheduled checkpoints, requested
checkpoints, buffers written by checkpoints, lru-scans and all-scans,
and the number of times the bgwriter aborted a round because it had
written too many buffers during lru-scans and all-scans.
</entry>
</row>
<row>
<entry><structname>pg_stat_database</></entry>
<entry>One row per database, showing database OID, database name,
......@@ -751,6 +761,71 @@ postgres: <replaceable>user</> <replaceable>database</> <replaceable>host</> <re
</entry>
</row>
<row>
<entry><literal><function>pg_stat_get_bgwriter_timed_checkpoints</function>()</literal></entry>
<entry><type>bigint</type></entry>
<entry>
The number of times the bgwriter has started timed checkpoints
(because the <varname>checkpoint_timeout</varname> time has expired).
</entry>
</row>
<row>
<entry><literal><function>pg_stat_get_bgwriter_requested_checkpoints</function>()</literal></entry>
<entry><type>bigint</type></entry>
<entry>
The number of times the bgwriter has started checkpoints based on
requests from backends because the <varname>checkpoint_segments</varname>
has been exceeded or because the CHECKPOINT command has been issued.
</entry>
</row>
<row>
<entry><literal><function>pg_stat_get_bgwriter_buf_written_checkpoints</function>()</literal></entry>
<entry><type>bigint</type></entry>
<entry>
The number of buffers written by the bgwriter during checkpoints.
</entry>
</row>
<row>
<entry><literal><function>pg_stat_get_bgwriter_buf_written_lru</function>()</literal></entry>
<entry><type>bigint</type></entry>
<entry>
The number of buffers written by the bgwriter when performing a
LRU scan of the buffer cache.
</entry>
</row>
<row>
<entry><literal><function>pg_stat_get_bgwriter_buf_written_all</function>()</literal></entry>
<entry><type>bigint</type></entry>
<entry>
The number of buffers written by the bgwriter when performing a
scan of all the buffer cache.
</entry>
</row>
<row>
<entry><literal><function>pg_stat_get_bgwriter_maxwritten_lru</function>()</literal></entry>
<entry><type>bigint</type></entry>
<entry>
The number of times the bgwriter has stopped its LRU round because
it has written more buffers than specified in the
<varname>bgwriter_lru_maxpages</varname> parameter.
</entry>
</row>
<row>
<entry><literal><function>pg_stat_get_bgwriter_maxwritten_all</function>()</literal></entry>
<entry><type>bigint</type></entry>
<entry>
The number of times the bgwriter has stopped its all-buffer round
because it has written more buffers than specified in the
<varname>bgwriter_all_maxpages</varname> parameter.
</entry>
</row>
<row>
<entry><literal><function>pg_stat_clear_snapshot</function>()</literal></entry>
<entry><type>void</type></entry>
......
src/backend/catalog/system_views.sql
View file @ 335feca4
......@@ -3,7 +3,7 @@
*
* Copyright (c) 1996-2007, PostgreSQL Global Development Group
*
* $PostgreSQL: pgsql/src/backend/catalog/system_views.sql,v 1.36 2007/03/16 17:57:36 mha Exp $
* $PostgreSQL: pgsql/src/backend/catalog/system_views.sql,v 1.37 2007/03/30 18:34:55 mha Exp $
*/
CREATE VIEW pg_roles AS
......@@ -364,3 +364,13 @@ CREATE VIEW pg_stat_database AS
pg_stat_get_db_tuples_updated(D.oid) AS tup_updated,
pg_stat_get_db_tuples_deleted(D.oid) AS tup_deleted
FROM pg_database D;
CREATE VIEW pg_stat_bgwriter AS
SELECT
pg_stat_get_bgwriter_timed_checkpoints() AS checkpoints_timed,
pg_stat_get_bgwriter_requested_checkpoints() AS checkpoints_req,
pg_stat_get_bgwriter_buf_written_checkpoints() AS buffers_checkpoint,
pg_stat_get_bgwriter_buf_written_lru() AS buffers_lru,
pg_stat_get_bgwriter_buf_written_all() AS buffers_all,
pg_stat_get_bgwriter_maxwritten_lru() AS maxwritten_lru,
pg_stat_get_bgwriter_maxwritten_all() AS maxwritten_all;
src/backend/postmaster/bgwriter.c
View file @ 335feca4
......@@ -37,7 +37,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/postmaster/bgwriter.c,v 1.36 2007/01/17 16:25:01 tgl Exp $
* $PostgreSQL: pgsql/src/backend/postmaster/bgwriter.c,v 1.37 2007/03/30 18:34:55 mha Exp $
*
*-------------------------------------------------------------------------
*/
......@@ -50,6 +50,7 @@
#include "access/xlog_internal.h"
#include "libpq/pqsignal.h"
#include "miscadmin.h"
#include "pgstat.h"
#include "postmaster/bgwriter.h"
#include "storage/fd.h"
#include "storage/freespace.h"
......@@ -124,6 +125,13 @@ typedef struct
static BgWriterShmemStruct *BgWriterShmem;
/*
* BgWriter statistics counters.
* Stored directly in a stats message structure so it can be sent
* without needing to copy things around.
*/
PgStat_MsgBgWriter BgWriterStats;
/*
* GUC parameters
*/
......@@ -242,6 +250,11 @@ BackgroundWriterMain(void)
ALLOCSET_DEFAULT_MAXSIZE);
MemoryContextSwitchTo(bgwriter_context);
/*
* Initialize statistics counters to zero
*/
memset(&BgWriterStats, 0, sizeof(BgWriterStats));
/*
* If an exception is encountered, processing resumes here.
*
......@@ -354,6 +367,7 @@ BackgroundWriterMain(void)
checkpoint_requested = false;
do_checkpoint = true;
force_checkpoint = true;
BgWriterStats.m_requested_checkpoints++;
}
if (shutdown_requested)
{
......@@ -376,7 +390,11 @@ BackgroundWriterMain(void)
now = time(NULL);
elapsed_secs = now - last_checkpoint_time;
if (elapsed_secs >= CheckPointTimeout)
{
do_checkpoint = true;
if (!force_checkpoint)
BgWriterStats.m_timed_checkpoints++;
}
/*
* Do a checkpoint if requested, otherwise do one cycle of
......@@ -473,6 +491,11 @@ BackgroundWriterMain(void)
}
}
/*
* Send off activity statistics to the stats collector
*/
pgstat_send_bgwriter();
/*
* Nap for the configured time, or sleep for 10 seconds if there is no
* bgwriter activity configured.
......
src/backend/postmaster/pgstat.c
View file @ 335feca4
......@@ -13,7 +13,7 @@
*
* Copyright (c) 2001-2007, PostgreSQL Global Development Group
*
* $PostgreSQL: pgsql/src/backend/postmaster/pgstat.c,v 1.151 2007/03/28 22:17:12 alvherre Exp $
* $PostgreSQL: pgsql/src/backend/postmaster/pgstat.c,v 1.152 2007/03/30 18:34:55 mha Exp $
* ----------
*/
#include "postgres.h"
......@@ -135,6 +135,18 @@ static HTAB *pgStatDBHash = NULL;
static PgBackendStatus *localBackendStatusTable = NULL;
static int localNumBackends = 0;
/*
* BgWriter global statistics counters, from bgwriter.c
*/
extern PgStat_MsgBgWriter BgWriterStats;
/*
* Cluster wide statistics, kept in the stats collector.
* Contains statistics that are not collected per database
* or per table.
*/
static PgStat_GlobalStats globalStats;
static volatile bool need_exit = false;
static volatile bool need_statwrite = false;
......@@ -171,6 +183,7 @@ static void pgstat_recv_resetcounter(PgStat_MsgResetcounter *msg, int len);
static void pgstat_recv_autovac(PgStat_MsgAutovacStart *msg, int len);
static void pgstat_recv_vacuum(PgStat_MsgVacuum *msg, int len);
static void pgstat_recv_analyze(PgStat_MsgAnalyze *msg, int len);
static void pgstat_recv_bgwriter(PgStat_MsgBgWriter *msg, int len);
/* ------------------------------------------------------------
......@@ -1288,6 +1301,22 @@ pgstat_fetch_stat_numbackends(void)
return localNumBackends;
}
/*
* ---------
* pgstat_fetch_global() -
*
* Support function for the SQL-callable pgstat* functions. Returns
* a pointer to the global statistics struct.
* ---------
*/
PgStat_GlobalStats *
pgstat_fetch_global(void)
{
backend_read_statsfile();
return &globalStats;
}
/* ------------------------------------------------------------
* Functions for management of the shared-memory PgBackendStatus array
......@@ -1646,6 +1675,42 @@ pgstat_send(void *msg, int len)
#endif
}
/* ----------
* pgstat_send_bgwriter() -
*
* Send bgwriter statistics to the collector
* ----------
*/
void
pgstat_send_bgwriter(void)
{
/*
* This function can be called even if nothing at all has happened.
* In this case, avoid sending a completely empty message to
* the stats collector.
*/
if (BgWriterStats.m_timed_checkpoints == 0 &&
BgWriterStats.m_requested_checkpoints == 0 &&
BgWriterStats.m_buf_written_checkpoints == 0 &&
BgWriterStats.m_buf_written_lru == 0 &&
BgWriterStats.m_buf_written_all == 0 &&
BgWriterStats.m_maxwritten_lru == 0 &&
BgWriterStats.m_maxwritten_all == 0)
return;
/*
* Prepare and send the message
*/
pgstat_setheader(&BgWriterStats.m_hdr, PGSTAT_MTYPE_BGWRITER);
pgstat_send(&BgWriterStats, sizeof(BgWriterStats));
/*
* Clear out the bgwriter statistics buffer, so it can be
* re-used.
*/
memset(&BgWriterStats, 0, sizeof(BgWriterStats));
}
/* ----------
* PgstatCollectorMain() -
......@@ -1892,6 +1957,10 @@ PgstatCollectorMain(int argc, char *argv[])
pgstat_recv_analyze((PgStat_MsgAnalyze *) &msg, len);
break;
case PGSTAT_MTYPE_BGWRITER:
pgstat_recv_bgwriter((PgStat_MsgBgWriter *) &msg, len);
break;
default:
break;
}
......@@ -2030,6 +2099,11 @@ pgstat_write_statsfile(void)
format_id = PGSTAT_FILE_FORMAT_ID;
fwrite(&format_id, sizeof(format_id), 1, fpout);
/*
* Write global stats struct
*/
fwrite(&globalStats, sizeof(globalStats), 1, fpout);
/*
* Walk through the database table.
*/
......@@ -2132,6 +2206,12 @@ pgstat_read_statsfile(Oid onlydb)
dbhash = hash_create("Databases hash", PGSTAT_DB_HASH_SIZE, &hash_ctl,
HASH_ELEM | HASH_FUNCTION | HASH_CONTEXT);
/*
* Clear out global statistics so they start from zero in case we can't
* load an existing statsfile.
*/
memset(&globalStats, 0, sizeof(globalStats));
/*
* Try to open the status file. If it doesn't exist, the backends simply
* return zero for anything and the collector simply starts from scratch
......@@ -2151,6 +2231,16 @@ pgstat_read_statsfile(Oid onlydb)
goto done;
}
/*
* Read global stats struct
*/
if (fread(&globalStats, 1, sizeof(globalStats), fpin) != sizeof(globalStats))
{
ereport(pgStatRunningInCollector ? LOG : WARNING,
(errmsg("corrupted pgstat.stat file")));
goto done;
}
/*
* We found an existing collector stats file. Read it and put all the
* hashtable entries into place.
......@@ -2656,3 +2746,22 @@ pgstat_recv_analyze(PgStat_MsgAnalyze *msg, int len)
tabentry->n_dead_tuples = msg->m_dead_tuples;
tabentry->last_anl_tuples = msg->m_live_tuples + msg->m_dead_tuples;
}
/* ----------
* pgstat_recv_bgwriter() -
*
* Process a BGWRITER message.
* ----------
*/
static void
pgstat_recv_bgwriter(PgStat_MsgBgWriter *msg, int len)
{
globalStats.timed_checkpoints += msg->m_timed_checkpoints;
globalStats.requested_checkpoints += msg->m_requested_checkpoints;
globalStats.buf_written_checkpoints += msg->m_buf_written_checkpoints;
globalStats.buf_written_lru += msg->m_buf_written_lru;
globalStats.buf_written_all += msg->m_buf_written_all;
globalStats.maxwritten_lru += msg->m_maxwritten_lru;
globalStats.maxwritten_all += msg->m_maxwritten_all;
}
src/backend/storage/buffer/bufmgr.c
View file @ 335feca4
......@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/storage/buffer/bufmgr.c,v 1.215 2007/02/01 19:10:27 momjian Exp $
* $PostgreSQL: pgsql/src/backend/storage/buffer/bufmgr.c,v 1.216 2007/03/30 18:34:55 mha Exp $
*
*-------------------------------------------------------------------------
*/
......@@ -80,6 +80,12 @@ static bool IsForInput;
/* local state for LockBufferForCleanup */
static volatile BufferDesc *PinCountWaitBuf = NULL;
/*
* Global statistics for the bgwriter. The contents of this variable
* only makes sense in the bgwriter process.
*/
extern PgStat_MsgBgWriter BgWriterStats;
static bool PinBuffer(volatile BufferDesc *buf);
static void PinBuffer_Locked(volatile BufferDesc *buf);
......@@ -964,6 +970,8 @@ BufferSync(void)
{
if (SyncOneBuffer(buf_id, false))
{
BgWriterStats.m_buf_written_checkpoints++;
/*
* If in bgwriter, absorb pending fsync requests after each
* WRITES_PER_ABSORB write operations, to prevent overflow of the
......@@ -1027,9 +1035,13 @@ BgBufferSync(void)
if (SyncOneBuffer(buf_id1, false))
{
if (++num_written >= bgwriter_all_maxpages)
{
BgWriterStats.m_maxwritten_all++;
break;
}
}
}
BgWriterStats.m_buf_written_all += num_written;
}
/*
......@@ -1048,11 +1060,15 @@ BgBufferSync(void)
if (SyncOneBuffer(buf_id2, true))
{
if (++num_written >= bgwriter_lru_maxpages)
{
BgWriterStats.m_maxwritten_lru++;
break;
}
}
if (++buf_id2 >= NBuffers)
buf_id2 = 0;
}
BgWriterStats.m_buf_written_lru += num_written;
}
}
......
src/backend/utils/adt/pgstatfuncs.c
View file @ 335feca4
......@@ -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
......
src/include/catalog/catversion.h
View file @ 335feca4
......@@ -37,7 +37,7 @@
* Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/catalog/catversion.h,v 1.396 2007/03/27 23:21:11 tgl Exp $
* $PostgreSQL: pgsql/src/include/catalog/catversion.h,v 1.397 2007/03/30 18:34:56 mha Exp $
*
*-------------------------------------------------------------------------
*/
......@@ -53,6 +53,6 @@
*/
/* yyyymmddN */
#define CATALOG_VERSION_NO 200703271
#define CATALOG_VERSION_NO 200703301
#endif
src/include/catalog/pg_proc.h
View file @ 335feca4
......@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/catalog/pg_proc.h,v 1.451 2007/03/27 23:21:11 tgl Exp $
* $PostgreSQL: pgsql/src/include/catalog/pg_proc.h,v 1.452 2007/03/30 18:34:56 mha Exp $
*
* NOTES
* The script catalog/genbki.sh reads this file and generates .bki
......@@ -2987,6 +2987,20 @@ DATA(insert OID = 2761 ( pg_stat_get_db_tuples_updated PGNSP PGUID 12 1 0 f f t
DESCR("Statistics: Tuples updated in database");
DATA(insert OID = 2762 ( pg_stat_get_db_tuples_deleted PGNSP PGUID 12 1 0 f f t f s 1 20 "26" _null_ _null_ _null_ pg_stat_get_db_tuples_deleted - _null_ ));
DESCR("Statistics: Tuples deleted in database");
DATA(insert OID = 2769 ( pg_stat_get_bgwriter_timed_checkpoints PGNSP PGUID 12 1 0 f f t f s 0 20 "" _null_ _null_ _null_ pg_stat_get_bgwriter_timed_checkpoints - _null_ ));
DESCR("Statistics: Number of timed checkpoints started by the bgwriter");
DATA(insert OID = 2770 ( pg_stat_get_bgwriter_requested_checkpoints PGNSP PGUID 12 1 0 f f t f s 0 20 "" _null_ _null_ _null_ pg_stat_get_bgwriter_requested_checkpoints - _null_ ));
DESCR("Statistics: Number of backend requested checkpoints started by the bgwriter");
DATA(insert OID = 2771 ( pg_stat_get_bgwriter_buf_written_checkpoints PGNSP PGUID 12 1 0 f f t f s 0 20 "" _null_ _null_ _null_ pg_stat_get_bgwriter_buf_written_checkpoints - _null_ ));
DESCR("Statistics: Number of buffers written by the bgwriter during checkpoints");
DATA(insert OID = 2772 ( pg_stat_get_bgwriter_buf_written_lru PGNSP PGUID 12 1 0 f f t f s 0 20 "" _null_ _null_ _null_ pg_stat_get_bgwriter_buf_written_lru - _null_ ));
DESCR("Statistics: Number of buffers written by the bgwriter during LRU scans");
DATA(insert OID = 2773 ( pg_stat_get_bgwriter_buf_written_all PGNSP PGUID 12 1 0 f f t f s 0 20 "" _null_ _null_ _null_ pg_stat_get_bgwriter_buf_written_all - _null_ ));
DESCR("Statistics: Number of buffers written by the bgwriter during all-buffer scans");
DATA(insert OID = 2774 ( pg_stat_get_bgwriter_maxwritten_lru PGNSP PGUID 12 1 0 f f t f s 0 20 "" _null_ _null_ _null_ pg_stat_get_bgwriter_maxwritten_lru - _null_ ));
DESCR("Statistics: Number of times the bgwriter stopped processing when it had written too many buffers during LRU scans");
DATA(insert OID = 2775 ( pg_stat_get_bgwriter_maxwritten_all PGNSP PGUID 12 1 0 f f t f s 0 20 "" _null_ _null_ _null_ pg_stat_get_bgwriter_maxwritten_all - _null_ ));
DESCR("Statistics: Number of times the bgwriter stopped processing when it had written too many buffers during all-buffer scans");
DATA(insert OID = 2230 ( pg_stat_clear_snapshot PGNSP PGUID 12 1 0 f f f f v 0 2278 "" _null_ _null_ _null_ pg_stat_clear_snapshot - _null_ ));
DESCR("Statistics: Discard current transaction's statistics snapshot");
DATA(insert OID = 2274 ( pg_stat_reset PGNSP PGUID 12 1 0 f f f f v 0 2278 "" _null_ _null_ _null_ pg_stat_reset - _null_ ));
......
src/include/pgstat.h
View file @ 335feca4
......@@ -5,7 +5,7 @@
*
* Copyright (c) 2001-2007, PostgreSQL Global Development Group
*
* $PostgreSQL: pgsql/src/include/pgstat.h,v 1.56 2007/03/22 19:53:31 momjian Exp $
* $PostgreSQL: pgsql/src/include/pgstat.h,v 1.57 2007/03/30 18:34:55 mha Exp $
* ----------
*/
#ifndef PGSTAT_H
......@@ -30,7 +30,8 @@ typedef enum StatMsgType
PGSTAT_MTYPE_RESETCOUNTER,
PGSTAT_MTYPE_AUTOVAC_START,
PGSTAT_MTYPE_VACUUM,
PGSTAT_MTYPE_ANALYZE
PGSTAT_MTYPE_ANALYZE,
PGSTAT_MTYPE_BGWRITER
} StatMsgType;
/* ----------
......@@ -212,6 +213,24 @@ typedef struct PgStat_MsgAnalyze
} PgStat_MsgAnalyze;
/* ----------
* PgStat_MsgBgWriter Sent by the bgwriter to update statistics.
* ----------
*/
typedef struct PgStat_MsgBgWriter
{
PgStat_MsgHdr m_hdr;
PgStat_Counter m_timed_checkpoints;
PgStat_Counter m_requested_checkpoints;
PgStat_Counter m_buf_written_checkpoints;
PgStat_Counter m_buf_written_lru;
PgStat_Counter m_buf_written_all;
PgStat_Counter m_maxwritten_lru;
PgStat_Counter m_maxwritten_all;
} PgStat_MsgBgWriter;
/* ----------
* PgStat_Msg Union over all possible messages.
* ----------
......@@ -227,6 +246,7 @@ typedef union PgStat_Msg
PgStat_MsgAutovacStart msg_autovacuum;
PgStat_MsgVacuum msg_vacuum;
PgStat_MsgAnalyze msg_analyze;
PgStat_MsgBgWriter msg_bgwriter;
} PgStat_Msg;
......@@ -297,6 +317,21 @@ typedef struct PgStat_StatTabEntry
} PgStat_StatTabEntry;
/*
* Global statistics kept in the stats collector
*/
typedef struct PgStat_GlobalStats
{
PgStat_Counter timed_checkpoints;
PgStat_Counter requested_checkpoints;
PgStat_Counter buf_written_checkpoints;
PgStat_Counter buf_written_lru;
PgStat_Counter buf_written_all;
PgStat_Counter maxwritten_lru;
PgStat_Counter maxwritten_all;
} PgStat_GlobalStats;
/* ----------
* Shared-memory data structures
* ----------
......@@ -478,6 +513,7 @@ extern void pgstat_initstats(PgStat_Info *stats, Relation rel);
extern void pgstat_count_xact_commit(void);
extern void pgstat_count_xact_rollback(void);
extern void pgstat_send_bgwriter(void);
/* ----------
* Support functions for the SQL-callable functions to
......@@ -488,5 +524,6 @@ extern PgStat_StatDBEntry *pgstat_fetch_stat_dbentry(Oid dbid);
extern PgStat_StatTabEntry *pgstat_fetch_stat_tabentry(Oid relid);
extern PgBackendStatus *pgstat_fetch_stat_beentry(int beid);
extern int pgstat_fetch_stat_numbackends(void);
extern PgStat_GlobalStats *pgstat_fetch_global(void);
#endif /* PGSTAT_H */
src/test/regress/expected/rules.out
View file @ 335feca4
......@@ -1292,6 +1292,7 @@ SELECT viewname, definition FROM pg_views WHERE schemaname <> 'information_schem
pg_stat_activity | SELECT d.oid AS datid, d.datname, pg_stat_get_backend_pid(s.backendid) AS procpid, pg_stat_get_backend_userid(s.backendid) AS usesysid, u.rolname AS usename, pg_stat_get_backend_activity(s.backendid) AS current_query, pg_stat_get_backend_waiting(s.backendid) AS waiting, pg_stat_get_backend_txn_start(s.backendid) AS txn_start, pg_stat_get_backend_activity_start(s.backendid) AS query_start, pg_stat_get_backend_start(s.backendid) AS backend_start, pg_stat_get_backend_client_addr(s.backendid) AS client_addr, pg_stat_get_backend_client_port(s.backendid) AS client_port FROM pg_database d, (SELECT pg_stat_get_backend_idset() AS backendid) s, pg_authid u WHERE ((pg_stat_get_backend_dbid(s.backendid) = d.oid) AND (pg_stat_get_backend_userid(s.backendid) = u.oid));
pg_stat_all_indexes | SELECT c.oid AS relid, i.oid AS indexrelid, n.nspname AS schemaname, c.relname, i.relname AS indexrelname, pg_stat_get_numscans(i.oid) AS idx_scan, pg_stat_get_tuples_returned(i.oid) AS idx_tup_read, pg_stat_get_tuples_fetched(i.oid) AS idx_tup_fetch FROM (((pg_class c JOIN pg_index x ON ((c.oid = x.indrelid))) JOIN pg_class i ON ((i.oid = x.indexrelid))) LEFT JOIN pg_namespace n ON ((n.oid = c.relnamespace))) WHERE (c.relkind = ANY (ARRAY['r'::"char", 't'::"char"]));
pg_stat_all_tables | SELECT c.oid AS relid, n.nspname AS schemaname, c.relname, pg_stat_get_numscans(c.oid) AS seq_scan, pg_stat_get_tuples_returned(c.oid) AS seq_tup_read, (sum(pg_stat_get_numscans(i.indexrelid)))::bigint AS idx_scan, ((sum(pg_stat_get_tuples_fetched(i.indexrelid)))::bigint + pg_stat_get_tuples_fetched(c.oid)) AS idx_tup_fetch, pg_stat_get_tuples_inserted(c.oid) AS n_tup_ins, pg_stat_get_tuples_updated(c.oid) AS n_tup_upd, pg_stat_get_tuples_deleted(c.oid) AS n_tup_del, pg_stat_get_live_tuples(c.oid) AS n_live_tup, pg_stat_get_dead_tuples(c.oid) AS n_dead_tup, pg_stat_get_last_vacuum_time(c.oid) AS last_vacuum, pg_stat_get_last_autovacuum_time(c.oid) AS last_autovacuum, pg_stat_get_last_analyze_time(c.oid) AS last_analyze, pg_stat_get_last_autoanalyze_time(c.oid) AS last_autoanalyze FROM ((pg_class c LEFT JOIN pg_index i ON ((c.oid = i.indrelid))) LEFT JOIN pg_namespace n ON ((n.oid = c.relnamespace))) WHERE (c.relkind = ANY (ARRAY['r'::"char", 't'::"char"])) GROUP BY c.oid, n.nspname, c.relname;
pg_stat_bgwriter | SELECT pg_stat_get_bgwriter_timed_checkpoints() AS checkpoints_timed, pg_stat_get_bgwriter_requested_checkpoints() AS checkpoints_req, pg_stat_get_bgwriter_buf_written_checkpoints() AS buffers_checkpoint, pg_stat_get_bgwriter_buf_written_lru() AS buffers_lru, pg_stat_get_bgwriter_buf_written_all() AS buffers_all, pg_stat_get_bgwriter_maxwritten_lru() AS maxwritten_lru, pg_stat_get_bgwriter_maxwritten_all() AS maxwritten_all;
pg_stat_database | SELECT d.oid AS datid, d.datname, pg_stat_get_db_numbackends(d.oid) AS numbackends, pg_stat_get_db_xact_commit(d.oid) AS xact_commit, pg_stat_get_db_xact_rollback(d.oid) AS xact_rollback, (pg_stat_get_db_blocks_fetched(d.oid) - pg_stat_get_db_blocks_hit(d.oid)) AS blks_read, pg_stat_get_db_blocks_hit(d.oid) AS blks_hit, pg_stat_get_db_tuples_returned(d.oid) AS tup_returned, pg_stat_get_db_tuples_fetched(d.oid) AS tup_fetched, pg_stat_get_db_tuples_inserted(d.oid) AS tup_inserted, pg_stat_get_db_tuples_updated(d.oid) AS tup_updated, pg_stat_get_db_tuples_deleted(d.oid) AS tup_deleted FROM pg_database d;
pg_stat_sys_indexes | SELECT pg_stat_all_indexes.relid, pg_stat_all_indexes.indexrelid, pg_stat_all_indexes.schemaname, pg_stat_all_indexes.relname, pg_stat_all_indexes.indexrelname, pg_stat_all_indexes.idx_scan, pg_stat_all_indexes.idx_tup_read, pg_stat_all_indexes.idx_tup_fetch FROM pg_stat_all_indexes WHERE (pg_stat_all_indexes.schemaname = ANY (ARRAY['pg_catalog'::"name", 'pg_toast'::"name", 'information_schema'::"name"]));
pg_stat_sys_tables | SELECT pg_stat_all_tables.relid, pg_stat_all_tables.schemaname, pg_stat_all_tables.relname, pg_stat_all_tables.seq_scan, pg_stat_all_tables.seq_tup_read, pg_stat_all_tables.idx_scan, pg_stat_all_tables.idx_tup_fetch, pg_stat_all_tables.n_tup_ins, pg_stat_all_tables.n_tup_upd, pg_stat_all_tables.n_tup_del, pg_stat_all_tables.n_live_tup, pg_stat_all_tables.n_dead_tup, pg_stat_all_tables.last_vacuum, pg_stat_all_tables.last_autovacuum, pg_stat_all_tables.last_analyze, pg_stat_all_tables.last_autoanalyze FROM pg_stat_all_tables WHERE (pg_stat_all_tables.schemaname = ANY (ARRAY['pg_catalog'::"name", 'pg_toast'::"name", 'information_schema'::"name"]));
......@@ -1326,7 +1327,7 @@ SELECT viewname, definition FROM pg_views WHERE schemaname <> 'information_schem
shoelace_obsolete | SELECT shoelace.sl_name, shoelace.sl_avail, shoelace.sl_color, shoelace.sl_len, shoelace.sl_unit, shoelace.sl_len_cm FROM shoelace WHERE (NOT (EXISTS (SELECT shoe.shoename FROM shoe WHERE (shoe.slcolor = shoelace.sl_color))));
street | SELECT r."name", r.thepath, c.cname FROM ONLY road r, real_city c WHERE (c.outline ## r.thepath);
toyemp | SELECT emp."name", emp.age, emp."location", (12 * emp.salary) AS annualsal FROM emp;
(48 rows)
(49 rows)
SELECT tablename, rulename, definition FROM pg_rules
ORDER BY tablename, rulename;
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment