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Add deadlock counter to pg_stat_database

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Adds a counter that tracks number of deadlocks that occurred in
each database to pg_stat_database.

Magnus Hagander, reviewed by Jaime Casanova
This commit is contained in:
Magnus Hagander
2012-01-26 15:58:19 +01:00
parent 0e549697d1
commit 61cb8c5abb
9 changed files with 91 additions and 8 deletions
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19
src/include/pgstat.h
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@ -48,7 +48,8 @@ typedef enum StatMsgType
PGSTAT_MTYPE_FUNCSTAT,
PGSTAT_MTYPE_FUNCPURGE,
PGSTAT_MTYPE_RECOVERYCONFLICT,
PGSTAT_MTYPE_TEMPFILE
PGSTAT_MTYPE_TEMPFILE,
PGSTAT_MTYPE_DEADLOCK
} StatMsgType;
/* ----------
@ -462,6 +463,17 @@ typedef struct PgStat_MsgFuncpurge
Oid m_functionid[PGSTAT_NUM_FUNCPURGE];
} PgStat_MsgFuncpurge;
/* ----------
* PgStat_MsgDeadlock Sent by the backend to tell the collector
* about a deadlock that occurred.
* ----------
*/
typedef struct PgStat_MsgDeadlock
{
PgStat_MsgHdr m_hdr;
Oid m_databaseid;
} PgStat_MsgDeadlock;
/* ----------
* PgStat_Msg Union over all possible messages.
@ -485,6 +497,7 @@ typedef union PgStat_Msg
PgStat_MsgFuncstat msg_funcstat;
PgStat_MsgFuncpurge msg_funcpurge;
PgStat_MsgRecoveryConflict msg_recoveryconflict;
PgStat_MsgDeadlock msg_deadlock;
} PgStat_Msg;
@ -496,7 +509,7 @@ typedef union PgStat_Msg
* ------------------------------------------------------------
*/
#define PGSTAT_FILE_FORMAT_ID 0x01A5BC99
#define PGSTAT_FILE_FORMAT_ID 0x01A5BC9A
/* ----------
* PgStat_StatDBEntry The collector's data per database
@ -522,6 +535,7 @@ typedef struct PgStat_StatDBEntry
PgStat_Counter n_conflict_startup_deadlock;
PgStat_Counter n_temp_files;
PgStat_Counter n_temp_bytes;
PgStat_Counter n_deadlocks;
TimestampTz stat_reset_timestamp;
@ -746,6 +760,7 @@ extern void pgstat_report_analyze(Relation rel,
PgStat_Counter livetuples, PgStat_Counter deadtuples);
extern void pgstat_report_recovery_conflict(int reason);
extern void pgstat_report_deadlock(void);
extern void pgstat_initialize(void);
extern void pgstat_bestart(void);