*
* Definitions for the PostgreSQL statistics collector daemon.
*
- * Copyright (c) 2001-2005, PostgreSQL Global Development Group
+ * Copyright (c) 2001-2007, PostgreSQL Global Development Group
*
- * $PostgreSQL: pgsql/src/include/pgstat.h,v 1.41 2006/01/18 20:35:06 tgl Exp $
+ * $PostgreSQL: pgsql/src/include/pgstat.h,v 1.59 2007/05/27 03:50:39 tgl Exp $
* ----------
*/
#ifndef PGSTAT_H
#include "utils/rel.h"
#include "utils/timestamp.h"
+
/* ----------
- * The types of backend/postmaster -> collector messages
+ * The types of backend -> collector messages
* ----------
*/
typedef enum StatMsgType
{
PGSTAT_MTYPE_DUMMY,
- PGSTAT_MTYPE_BESTART,
- PGSTAT_MTYPE_BETERM,
- PGSTAT_MTYPE_ACTIVITY,
PGSTAT_MTYPE_TABSTAT,
PGSTAT_MTYPE_TABPURGE,
PGSTAT_MTYPE_DROPDB,
PGSTAT_MTYPE_RESETCOUNTER,
PGSTAT_MTYPE_AUTOVAC_START,
PGSTAT_MTYPE_VACUUM,
- PGSTAT_MTYPE_ANALYZE
+ PGSTAT_MTYPE_ANALYZE,
+ PGSTAT_MTYPE_BGWRITER
} StatMsgType;
/* ----------
*/
typedef int64 PgStat_Counter;
-
-/* ------------------------------------------------------------
- * Message formats follow
- * ------------------------------------------------------------
- */
-
-
-/* ----------
- * PgStat_MsgHdr The common message header
- * ----------
- */
-typedef struct PgStat_MsgHdr
-{
- StatMsgType m_type;
- int m_size;
- int m_backendid;
- int m_procpid;
-} PgStat_MsgHdr;
-
-/* ----------
- * Space available in a message. This will keep the UDP packets below 1K,
- * which should fit unfragmented into the MTU of the lo interface on most
- * platforms. Does anybody care for platforms where it doesn't?
- * ----------
- */
-#define PGSTAT_MSG_PAYLOAD (1000 - sizeof(PgStat_MsgHdr))
-
/* ----------
- * PgStat_TableEntry Per-table info in a MsgTabstat
+ * PgStat_TableCounts The actual per-table counts kept by a backend
+ *
+ * This struct should contain only actual event counters, because we memcmp
+ * it against zeroes to detect whether there are any counts to transmit.
+ * It is a component of PgStat_TableStatus (within-backend state) and
+ * PgStat_TableEntry (the transmitted message format).
*
* Note: for a table, tuples_returned is the number of tuples successfully
* fetched by heap_getnext, while tuples_fetched is the number of tuples
* For an index, tuples_returned is the number of index entries returned by
* the index AM, while tuples_fetched is the number of tuples successfully
* fetched by heap_fetch under the control of simple indexscans for this index.
+ *
+ * tuples_inserted/tuples_updated/tuples_deleted count attempted actions,
+ * regardless of whether the transaction committed. new_live_tuples and
+ * new_dead_tuples are properly adjusted depending on commit or abort.
* ----------
*/
-typedef struct PgStat_TableEntry
+typedef struct PgStat_TableCounts
{
- Oid t_id;
-
PgStat_Counter t_numscans;
PgStat_Counter t_tuples_returned;
PgStat_Counter t_tuples_updated;
PgStat_Counter t_tuples_deleted;
+ PgStat_Counter t_new_live_tuples;
+ PgStat_Counter t_new_dead_tuples;
+
PgStat_Counter t_blocks_fetched;
PgStat_Counter t_blocks_hit;
-} PgStat_TableEntry;
+} PgStat_TableCounts;
-/* ----------
- * PgStat_MsgDummy A dummy message, ignored by the collector
- * ----------
+/* ------------------------------------------------------------
+ * Structures kept in backend local memory while accumulating counts
+ * ------------------------------------------------------------
*/
-typedef struct PgStat_MsgDummy
-{
- PgStat_MsgHdr m_hdr;
- char m_dummy[512];
-} PgStat_MsgDummy;
+
/* ----------
- * PgStat_MsgBestart Sent by the backend on startup
+ * PgStat_TableStatus Per-table status within a backend
+ *
+ * Most of the event counters are nontransactional, ie, we count events
+ * in committed and aborted transactions alike. For these, we just count
+ * directly in the PgStat_TableStatus. However, new_live_tuples and
+ * new_dead_tuples must be derived from tuple insertion and deletion counts
+ * with awareness of whether the transaction or subtransaction committed or
+ * aborted. Hence, we also keep a stack of per-(sub)transaction status
+ * records for every table modified in the current transaction. At commit
+ * or abort, we propagate tuples_inserted and tuples_deleted up to the
+ * parent subtransaction level, or out to the parent PgStat_TableStatus,
+ * as appropriate.
* ----------
*/
-typedef struct PgStat_MsgBestart
+typedef struct PgStat_TableStatus
{
- PgStat_MsgHdr m_hdr;
- Oid m_databaseid;
- Oid m_userid;
- SockAddr m_clientaddr;
-} PgStat_MsgBestart;
+ Oid t_id; /* table's OID */
+ bool t_shared; /* is it a shared catalog? */
+ struct PgStat_TableXactStatus *trans; /* lowest subxact's counts */
+ PgStat_TableCounts t_counts; /* event counts to be sent */
+} PgStat_TableStatus;
/* ----------
- * PgStat_MsgBeterm Sent by the postmaster after backend exit
+ * PgStat_TableXactStatus Per-table, per-subtransaction status
* ----------
*/
-typedef struct PgStat_MsgBeterm
+typedef struct PgStat_TableXactStatus
{
- PgStat_MsgHdr m_hdr;
-} PgStat_MsgBeterm;
+ PgStat_Counter tuples_inserted; /* tuples inserted in (sub)xact */
+ PgStat_Counter tuples_deleted; /* tuples deleted in (sub)xact */
+ int nest_level; /* subtransaction nest level */
+ /* links to other structs for same relation: */
+ struct PgStat_TableXactStatus *upper; /* next higher subxact if any */
+ PgStat_TableStatus *parent; /* per-table status */
+ /* structs of same subxact level are linked here: */
+ struct PgStat_TableXactStatus *next; /* next of same subxact */
+} PgStat_TableXactStatus;
+
+
+/* ------------------------------------------------------------
+ * Message formats follow
+ * ------------------------------------------------------------
+ */
+
/* ----------
- * PgStat_MsgAutovacStart Sent by the autovacuum daemon to signal
- * that a database is going to be processed
+ * PgStat_MsgHdr The common message header
* ----------
*/
-typedef struct PgStat_MsgAutovacStart
+typedef struct PgStat_MsgHdr
{
- PgStat_MsgHdr m_hdr;
- Oid m_databaseid;
- TimestampTz m_start_time;
-} PgStat_MsgAutovacStart;
+ StatMsgType m_type;
+ int m_size;
+} PgStat_MsgHdr;
/* ----------
- * PgStat_MsgVacuum Sent by the backend or autovacuum daemon
- * after VACUUM or VACUUM ANALYZE
+ * Space available in a message. This will keep the UDP packets below 1K,
+ * which should fit unfragmented into the MTU of the lo interface on most
+ * platforms. Does anybody care for platforms where it doesn't?
* ----------
*/
-typedef struct PgStat_MsgVacuum
-{
- PgStat_MsgHdr m_hdr;
- Oid m_databaseid;
- Oid m_tableoid;
- bool m_analyze;
- PgStat_Counter m_tuples;
-} PgStat_MsgVacuum;
+#define PGSTAT_MSG_PAYLOAD (1000 - sizeof(PgStat_MsgHdr))
+
/* ----------
- * PgStat_MsgAnalyze Sent by the backend or autovacuum daemon
- * after ANALYZE
+ * PgStat_MsgDummy A dummy message, ignored by the collector
* ----------
*/
-typedef struct PgStat_MsgAnalyze
+typedef struct PgStat_MsgDummy
{
PgStat_MsgHdr m_hdr;
- Oid m_databaseid;
- Oid m_tableoid;
- PgStat_Counter m_live_tuples;
- PgStat_Counter m_dead_tuples;
-} PgStat_MsgAnalyze;
+} PgStat_MsgDummy;
/* ----------
- * PgStat_MsgActivity Sent by the backends when they start
- * to parse a query.
+ * PgStat_TableEntry Per-table info in a MsgTabstat
* ----------
*/
-#define PGSTAT_ACTIVITY_SIZE PGSTAT_MSG_PAYLOAD
-
-typedef struct PgStat_MsgActivity
+typedef struct PgStat_TableEntry
{
- PgStat_MsgHdr m_hdr;
- char m_cmd_str[PGSTAT_ACTIVITY_SIZE];
-} PgStat_MsgActivity;
+ Oid t_id;
+ PgStat_TableCounts t_counts;
+} PgStat_TableEntry;
/* ----------
* PgStat_MsgTabstat Sent by the backend to report table
PgStat_TableEntry m_entry[PGSTAT_NUM_TABENTRIES];
} PgStat_MsgTabstat;
+
/* ----------
* PgStat_MsgTabpurge Sent by the backend to tell the collector
* about dead tables.
} PgStat_MsgResetcounter;
+/* ----------
+ * PgStat_MsgAutovacStart Sent by the autovacuum daemon to signal
+ * that a database is going to be processed
+ * ----------
+ */
+typedef struct PgStat_MsgAutovacStart
+{
+ PgStat_MsgHdr m_hdr;
+ Oid m_databaseid;
+ TimestampTz m_start_time;
+} PgStat_MsgAutovacStart;
+
+
+/* ----------
+ * PgStat_MsgVacuum Sent by the backend or autovacuum daemon
+ * after VACUUM or VACUUM ANALYZE
+ * ----------
+ */
+typedef struct PgStat_MsgVacuum
+{
+ PgStat_MsgHdr m_hdr;
+ Oid m_databaseid;
+ Oid m_tableoid;
+ bool m_analyze;
+ bool m_autovacuum;
+ TimestampTz m_vacuumtime;
+ PgStat_Counter m_tuples;
+} PgStat_MsgVacuum;
+
+
+/* ----------
+ * PgStat_MsgAnalyze Sent by the backend or autovacuum daemon
+ * after ANALYZE
+ * ----------
+ */
+typedef struct PgStat_MsgAnalyze
+{
+ PgStat_MsgHdr m_hdr;
+ Oid m_databaseid;
+ Oid m_tableoid;
+ bool m_autovacuum;
+ TimestampTz m_analyzetime;
+ PgStat_Counter m_live_tuples;
+ PgStat_Counter m_dead_tuples;
+} 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.
* ----------
{
PgStat_MsgHdr msg_hdr;
PgStat_MsgDummy msg_dummy;
- PgStat_MsgBestart msg_bestart;
- PgStat_MsgActivity msg_activity;
PgStat_MsgTabstat msg_tabstat;
PgStat_MsgTabpurge msg_tabpurge;
PgStat_MsgDropdb msg_dropdb;
PgStat_MsgAutovacStart msg_autovacuum;
PgStat_MsgVacuum msg_vacuum;
PgStat_MsgAnalyze msg_analyze;
+ PgStat_MsgBgWriter msg_bgwriter;
} PgStat_Msg;
* ------------------------------------------------------------
*/
-#define PGSTAT_FILE_FORMAT_ID 0x01A5BC94
+#define PGSTAT_FILE_FORMAT_ID 0x01A5BC96
/* ----------
* PgStat_StatDBEntry The collector's data per database
typedef struct PgStat_StatDBEntry
{
Oid databaseid;
- int destroy;
- int n_backends;
PgStat_Counter n_xact_commit;
PgStat_Counter n_xact_rollback;
PgStat_Counter n_blocks_fetched;
PgStat_Counter n_blocks_hit;
+ PgStat_Counter n_tuples_returned;
+ PgStat_Counter n_tuples_fetched;
+ PgStat_Counter n_tuples_inserted;
+ PgStat_Counter n_tuples_updated;
+ PgStat_Counter n_tuples_deleted;
TimestampTz last_autovac_time;
/*
} PgStat_StatDBEntry;
-/* ----------
- * PgStat_StatBeEntry The collector's data per backend
- * ----------
- */
-typedef struct PgStat_StatBeEntry
-{
- /* An entry is non-empty iff procpid > 0 */
- int procpid;
- TimestampTz start_timestamp;
- TimestampTz activity_start_timestamp;
-
- /*
- * These fields are initialized by the BESTART message. If we have
- * received messages from a backend before we have received its BESTART,
- * these fields will be uninitialized: userid and databaseid will be
- * InvalidOid, and clientaddr will be undefined.
- */
- Oid userid;
- Oid databaseid;
- SockAddr clientaddr;
-
- /*
- * activity[] must be last in the struct, because we only write as much
- * of it as needed to the stats file.
- */
- char activity[PGSTAT_ACTIVITY_SIZE];
-} PgStat_StatBeEntry;
-
-
-/* ----------
- * PgStat_StatBeDead Because UDP packets can arrive out of
- * order, we need to keep some information
- * about backends that are known to be
- * dead for some seconds. This info is held
- * in a hash table of these structs.
- *
- * (This struct is not used in the stats file.)
- * ----------
- */
-typedef struct PgStat_StatBeDead
-{
- int procpid;
- int backendid;
- int destroy;
-} PgStat_StatBeDead;
-
-
/* ----------
* PgStat_StatTabEntry The collector's data per table (or index)
* ----------
typedef struct PgStat_StatTabEntry
{
Oid tableid;
- int destroy;
PgStat_Counter numscans;
PgStat_Counter blocks_fetched;
PgStat_Counter blocks_hit;
+
+ TimestampTz vacuum_timestamp; /* user initiated vacuum */
+ TimestampTz autovac_vacuum_timestamp; /* autovacuum initiated */
+ TimestampTz analyze_timestamp; /* user initiated */
+ TimestampTz autovac_analyze_timestamp; /* autovacuum initiated */
} 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
+ * ----------
+ */
+
+/* Max length of st_activity string ... perhaps replace with a GUC var? */
+#define PGBE_ACTIVITY_SIZE 1024
+
+/* ----------
+ * PgBackendStatus
+ *
+ * Each live backend maintains a PgBackendStatus struct in shared memory
+ * showing its current activity. (The structs are allocated according to
+ * BackendId, but that is not critical.) Note that the collector process
+ * has no involvement in, or even access to, these structs.
+ * ----------
+ */
+typedef struct PgBackendStatus
+{
+ /*
+ * To avoid locking overhead, we use the following protocol: a backend
+ * increments st_changecount before modifying its entry, and again after
+ * finishing a modification. A would-be reader should note the value of
+ * st_changecount, copy the entry into private memory, then check
+ * st_changecount again. If the value hasn't changed, and if it's even,
+ * the copy is valid; otherwise start over. This makes updates cheap
+ * while reads are potentially expensive, but that's the tradeoff we want.
+ */
+ int st_changecount;
+
+ /* The entry is valid iff st_procpid > 0, unused if st_procpid == 0 */
+ int st_procpid;
+
+ /* Times when current backend, transaction, and activity started */
+ TimestampTz st_proc_start_timestamp;
+ TimestampTz st_txn_start_timestamp;
+ TimestampTz st_activity_start_timestamp;
+
+ /* Database OID, owning user's OID, connection client address */
+ Oid st_databaseid;
+ Oid st_userid;
+ SockAddr st_clientaddr;
+
+ /* Is backend currently waiting on an lmgr lock? */
+ bool st_waiting;
+
+ /* current command string; MUST be null-terminated */
+ char st_activity[PGBE_ACTIVITY_SIZE];
+} PgBackendStatus;
+
+
/* ----------
* GUC parameters
* ----------
*/
extern bool pgstat_collect_startcollector;
extern bool pgstat_collect_resetonpmstart;
-extern bool pgstat_collect_querystring;
extern bool pgstat_collect_tuplelevel;
extern bool pgstat_collect_blocklevel;
+extern bool pgstat_collect_querystring;
+/*
+ * BgWriter statistics counters are updated directly by bgwriter and bufmgr
+ */
+extern PgStat_MsgBgWriter BgWriterStats;
/* ----------
* Functions called from postmaster
* ----------
*/
+extern Size BackendStatusShmemSize(void);
+extern void CreateSharedBackendStatus(void);
+
extern void pgstat_init(void);
extern int pgstat_start(void);
-extern void pgstat_beterm(int pid);
extern void pgstat_reset_all(void);
-
+extern void allow_immediate_pgstat_restart(void);
#ifdef EXEC_BACKEND
-extern void PgstatBufferMain(int argc, char *argv[]);
extern void PgstatCollectorMain(int argc, char *argv[]);
#endif
* Functions called from backends
* ----------
*/
-extern void pgstat_bestart(void);
-
extern void pgstat_ping(void);
-extern void pgstat_report_activity(const char *what);
-extern void pgstat_report_tabstat(void);
+
+extern void pgstat_report_tabstat(bool force);
+extern void pgstat_vacuum_tabstat(void);
+extern void pgstat_drop_database(Oid databaseid);
+extern void pgstat_drop_relation(Oid relid);
+
+extern void pgstat_clear_snapshot(void);
+extern void pgstat_reset_counters(void);
+
extern void pgstat_report_autovac(Oid dboid);
extern void pgstat_report_vacuum(Oid tableoid, bool shared,
bool analyze, PgStat_Counter tuples);
extern void pgstat_report_analyze(Oid tableoid, bool shared,
PgStat_Counter livetuples,
PgStat_Counter deadtuples);
-extern void pgstat_vacuum_tabstat(void);
-extern void pgstat_drop_relation(Oid relid);
-extern void pgstat_reset_counters(void);
+extern void pgstat_bestart(void);
+extern void pgstat_report_activity(const char *what);
+extern void pgstat_report_txn_timestamp(TimestampTz tstamp);
+extern void pgstat_report_waiting(bool waiting);
-extern void pgstat_initstats(PgStat_Info *stats, Relation rel);
+extern void pgstat_initstats(Relation rel);
+/* nontransactional event counts are simple enough to inline */
-#define pgstat_count_heap_scan(s) \
+#define pgstat_count_heap_scan(rel) \
do { \
- if (pgstat_collect_tuplelevel && (s)->tabentry != NULL) \
- ((PgStat_TableEntry *)((s)->tabentry))->t_numscans++; \
+ if (pgstat_collect_tuplelevel && (rel)->pgstat_info != NULL) \
+ (rel)->pgstat_info->t_counts.t_numscans++; \
} while (0)
/* kluge for bitmap scans: */
-#define pgstat_discount_heap_scan(s) \
+#define pgstat_discount_heap_scan(rel) \
do { \
- if (pgstat_collect_tuplelevel && (s)->tabentry != NULL) \
- ((PgStat_TableEntry *)((s)->tabentry))->t_numscans--; \
+ if (pgstat_collect_tuplelevel && (rel)->pgstat_info != NULL) \
+ (rel)->pgstat_info->t_counts.t_numscans--; \
} while (0)
-#define pgstat_count_heap_getnext(s) \
+#define pgstat_count_heap_getnext(rel) \
do { \
- if (pgstat_collect_tuplelevel && (s)->tabentry != NULL) \
- ((PgStat_TableEntry *)((s)->tabentry))->t_tuples_returned++; \
+ if (pgstat_collect_tuplelevel && (rel)->pgstat_info != NULL) \
+ (rel)->pgstat_info->t_counts.t_tuples_returned++; \
} while (0)
-#define pgstat_count_heap_fetch(s) \
+#define pgstat_count_heap_fetch(rel) \
do { \
- if (pgstat_collect_tuplelevel && (s)->tabentry != NULL) \
- ((PgStat_TableEntry *)((s)->tabentry))->t_tuples_fetched++; \
+ if (pgstat_collect_tuplelevel && (rel)->pgstat_info != NULL) \
+ (rel)->pgstat_info->t_counts.t_tuples_fetched++; \
} while (0)
-#define pgstat_count_heap_insert(s) \
+#define pgstat_count_index_scan(rel) \
do { \
- if (pgstat_collect_tuplelevel && (s)->tabentry != NULL) \
- ((PgStat_TableEntry *)((s)->tabentry))->t_tuples_inserted++; \
+ if (pgstat_collect_tuplelevel && (rel)->pgstat_info != NULL) \
+ (rel)->pgstat_info->t_counts.t_numscans++; \
} while (0)
-#define pgstat_count_heap_update(s) \
+#define pgstat_count_index_tuples(rel, n) \
do { \
- if (pgstat_collect_tuplelevel && (s)->tabentry != NULL) \
- ((PgStat_TableEntry *)((s)->tabentry))->t_tuples_updated++; \
+ if (pgstat_collect_tuplelevel && (rel)->pgstat_info != NULL) \
+ (rel)->pgstat_info->t_counts.t_tuples_returned += (n); \
} while (0)
-#define pgstat_count_heap_delete(s) \
+#define pgstat_count_buffer_read(rel) \
do { \
- if (pgstat_collect_tuplelevel && (s)->tabentry != NULL) \
- ((PgStat_TableEntry *)((s)->tabentry))->t_tuples_deleted++; \
+ if (pgstat_collect_blocklevel && (rel)->pgstat_info != NULL) \
+ (rel)->pgstat_info->t_counts.t_blocks_fetched++; \
} while (0)
-#define pgstat_count_index_scan(s) \
+#define pgstat_count_buffer_hit(rel) \
do { \
- if (pgstat_collect_tuplelevel && (s)->tabentry != NULL) \
- ((PgStat_TableEntry *)((s)->tabentry))->t_numscans++; \
- } while (0)
-#define pgstat_count_index_tuples(s, n) \
- do { \
- if (pgstat_collect_tuplelevel && (s)->tabentry != NULL) \
- ((PgStat_TableEntry *)((s)->tabentry))->t_tuples_returned += (n); \
- } while (0)
-#define pgstat_count_buffer_read(s,r) \
- do { \
- if (pgstat_collect_blocklevel) { \
- if ((s)->tabentry != NULL) \
- ((PgStat_TableEntry *)((s)->tabentry))->t_blocks_fetched++; \
- else { \
- pgstat_initstats((s), (r)); \
- if ((s)->tabentry != NULL) \
- ((PgStat_TableEntry *)((s)->tabentry))->t_blocks_fetched++; \
- } \
- } \
- } while (0)
-#define pgstat_count_buffer_hit(s,r) \
- do { \
- if (pgstat_collect_blocklevel) { \
- if ((s)->tabentry != NULL) \
- ((PgStat_TableEntry *)((s)->tabentry))->t_blocks_hit++; \
- else { \
- pgstat_initstats((s), (r)); \
- if ((s)->tabentry != NULL) \
- ((PgStat_TableEntry *)((s)->tabentry))->t_blocks_hit++; \
- } \
- } \
+ if (pgstat_collect_blocklevel && (rel)->pgstat_info != NULL) \
+ (rel)->pgstat_info->t_counts.t_blocks_hit++; \
} while (0)
+extern void pgstat_count_heap_insert(Relation rel);
+extern void pgstat_count_heap_update(Relation rel);
+extern void pgstat_count_heap_delete(Relation rel);
+
+extern void AtEOXact_PgStat(bool isCommit);
+extern void AtEOSubXact_PgStat(bool isCommit, int nestDepth);
+
+extern void AtPrepare_PgStat(void);
+extern void PostPrepare_PgStat(void);
+
+extern void pgstat_twophase_postcommit(TransactionId xid, uint16 info,
+ void *recdata, uint32 len);
+extern void pgstat_twophase_postabort(TransactionId xid, uint16 info,
+ void *recdata, uint32 len);
-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
*/
extern PgStat_StatDBEntry *pgstat_fetch_stat_dbentry(Oid dbid);
extern PgStat_StatTabEntry *pgstat_fetch_stat_tabentry(Oid relid);
-extern PgStat_StatBeEntry *pgstat_fetch_stat_beentry(int beid);
+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 */
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