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Add pg_stat_archiver statistics view.

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This view shows the statistics about the WAL archiver process's activity.

Gabriele Bartolini, reviewed by Michael Paquier, refactored a bit by me.
This commit is contained in:
Fujii Masao
2014-01-29 02:58:22 +09:00
parent 98d62c28fd
commit 9132b189bf
9 changed files with 327 additions and 19 deletions
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34
src/include/pgstat.h
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@ -15,6 +15,7 @@
#include "fmgr.h"
#include "libpq/pqcomm.h"
#include "portability/instr_time.h"
#include "postmaster/pgarch.h"
#include "utils/hsearch.h"
#include "utils/relcache.h"
@ -44,6 +45,7 @@ typedef enum StatMsgType
PGSTAT_MTYPE_AUTOVAC_START,
PGSTAT_MTYPE_VACUUM,
PGSTAT_MTYPE_ANALYZE,
PGSTAT_MTYPE_ARCHIVER,
PGSTAT_MTYPE_BGWRITER,
PGSTAT_MTYPE_FUNCSTAT,
PGSTAT_MTYPE_FUNCPURGE,
@ -102,6 +104,7 @@ typedef struct PgStat_TableCounts
/* Possible targets for resetting cluster-wide shared values */
typedef enum PgStat_Shared_Reset_Target
{
RESET_ARCHIVER,
RESET_BGWRITER
} PgStat_Shared_Reset_Target;
@ -355,6 +358,18 @@ typedef struct PgStat_MsgAnalyze
} PgStat_MsgAnalyze;
/* ----------
* PgStat_MsgArchiver Sent by the archiver to update statistics.
* ----------
*/
typedef struct PgStat_MsgArchiver
{
PgStat_MsgHdr m_hdr;
bool m_failed; /* Failed attempt */
char m_xlog[MAX_XFN_CHARS + 1];
TimestampTz m_timestamp;
} PgStat_MsgArchiver;
/* ----------
* PgStat_MsgBgWriter Sent by the bgwriter to update statistics.
* ----------
@ -502,6 +517,7 @@ typedef union PgStat_Msg
PgStat_MsgAutovacStart msg_autovacuum;
PgStat_MsgVacuum msg_vacuum;
PgStat_MsgAnalyze msg_analyze;
PgStat_MsgArchiver msg_archiver;
PgStat_MsgBgWriter msg_bgwriter;
PgStat_MsgFuncstat msg_funcstat;
PgStat_MsgFuncpurge msg_funcpurge;
@ -518,7 +534,7 @@ typedef union PgStat_Msg
* ------------------------------------------------------------
*/
#define PGSTAT_FILE_FORMAT_ID 0x01A5BC9B
#define PGSTAT_FILE_FORMAT_ID 0x01A5BC9C
/* ----------
* PgStat_StatDBEntry The collector's data per database
@ -611,6 +627,20 @@ typedef struct PgStat_StatFuncEntry
} PgStat_StatFuncEntry;
/*
* Archiver statistics kept in the stats collector
*/
typedef struct PgStat_ArchiverStats
{
PgStat_Counter archived_count; /* archival successes */
char last_archived_wal[MAX_XFN_CHARS + 1]; /* last WAL file archived */
TimestampTz last_archived_timestamp; /* last archival success time */
PgStat_Counter failed_count; /* failed archival attempts */
char last_failed_wal[MAX_XFN_CHARS + 1]; /* WAL file involved in last failure */
TimestampTz last_failed_timestamp; /* last archival failure time */
TimestampTz stat_reset_timestamp;
} PgStat_ArchiverStats;
/*
* Global statistics kept in the stats collector
*/
@ -863,6 +893,7 @@ extern void pgstat_twophase_postcommit(TransactionId xid, uint16 info,
extern void pgstat_twophase_postabort(TransactionId xid, uint16 info,
void *recdata, uint32 len);
extern void pgstat_send_archiver(const char *xlog, bool failed);
extern void pgstat_send_bgwriter(void);
/* ----------
@ -875,6 +906,7 @@ extern PgStat_StatTabEntry *pgstat_fetch_stat_tabentry(Oid relid);
extern PgBackendStatus *pgstat_fetch_stat_beentry(int beid);
extern PgStat_StatFuncEntry *pgstat_fetch_stat_funcentry(Oid funcid);
extern int pgstat_fetch_stat_numbackends(void);
extern PgStat_ArchiverStats *pgstat_fetch_stat_archiver(void);
extern PgStat_GlobalStats *pgstat_fetch_global(void);
#endif /* PGSTAT_H */