mirror of
https://git.postgresql.org/git/postgresql.git
synced 2026-02-09 08:27:30 +08:00
4f3924d9cd
We allow this module to be turned off on restarts, so a restart time check is enough to activate or deactivate the module; however, if there is a standby replaying WAL emitted from a master which is restarted, but the standby isn't, the state in the standby becomes inconsistent and can easily be crashed. Fix by activating and deactivating the module during WAL replay on parameter change as well as on system start. Problem reported by Fujii Masao in http://www.postgresql.org/message-id/CAHGQGwFhJ3CnHo1CELEfay18yg_RA-XZT-7D8NuWUoYSZ90r4Q@mail.gmail.com Author: Petr Jelínek
75 lines
2.3 KiB
C
75 lines
2.3 KiB
C
/*
|
|
* commit_ts.h
|
|
*
|
|
* PostgreSQL commit timestamp manager
|
|
*
|
|
* Portions Copyright (c) 1996-2015, PostgreSQL Global Development Group
|
|
* Portions Copyright (c) 1994, Regents of the University of California
|
|
*
|
|
* src/include/access/commit_ts.h
|
|
*/
|
|
#ifndef COMMIT_TS_H
|
|
#define COMMIT_TS_H
|
|
|
|
#include "access/xlog.h"
|
|
#include "datatype/timestamp.h"
|
|
#include "utils/guc.h"
|
|
|
|
|
|
extern PGDLLIMPORT bool track_commit_timestamp;
|
|
|
|
extern bool check_track_commit_timestamp(bool *newval, void **extra,
|
|
GucSource source);
|
|
|
|
typedef uint32 CommitTsNodeId;
|
|
#define InvalidCommitTsNodeId 0
|
|
|
|
extern void CommitTsSetDefaultNodeId(CommitTsNodeId nodeid);
|
|
extern CommitTsNodeId CommitTsGetDefaultNodeId(void);
|
|
extern void TransactionTreeSetCommitTsData(TransactionId xid, int nsubxids,
|
|
TransactionId *subxids, TimestampTz timestamp,
|
|
CommitTsNodeId nodeid, bool do_xlog);
|
|
extern bool TransactionIdGetCommitTsData(TransactionId xid,
|
|
TimestampTz *ts, CommitTsNodeId *nodeid);
|
|
extern TransactionId GetLatestCommitTsData(TimestampTz *ts,
|
|
CommitTsNodeId *nodeid);
|
|
|
|
extern Size CommitTsShmemBuffers(void);
|
|
extern Size CommitTsShmemSize(void);
|
|
extern void CommitTsShmemInit(void);
|
|
extern void BootStrapCommitTs(void);
|
|
extern void StartupCommitTs(void);
|
|
extern void ActivateCommitTs(void);
|
|
extern void DeactivateCommitTs(bool do_wal);
|
|
extern void CompleteCommitTsInitialization(void);
|
|
extern void ShutdownCommitTs(void);
|
|
extern void CheckPointCommitTs(void);
|
|
extern void ExtendCommitTs(TransactionId newestXact);
|
|
extern void TruncateCommitTs(TransactionId oldestXact, bool do_wal);
|
|
extern void SetCommitTsLimit(TransactionId oldestXact,
|
|
TransactionId newestXact);
|
|
extern void AdvanceOldestCommitTs(TransactionId oldestXact);
|
|
|
|
/* XLOG stuff */
|
|
#define COMMIT_TS_ZEROPAGE 0x00
|
|
#define COMMIT_TS_TRUNCATE 0x10
|
|
#define COMMIT_TS_SETTS 0x20
|
|
|
|
typedef struct xl_commit_ts_set
|
|
{
|
|
TimestampTz timestamp;
|
|
CommitTsNodeId nodeid;
|
|
TransactionId mainxid;
|
|
/* subxact Xids follow */
|
|
} xl_commit_ts_set;
|
|
|
|
#define SizeOfCommitTsSet (offsetof(xl_commit_ts_set, mainxid) + \
|
|
sizeof(TransactionId))
|
|
|
|
|
|
extern void commit_ts_redo(XLogReaderState *record);
|
|
extern void commit_ts_desc(StringInfo buf, XLogReaderState *record);
|
|
extern const char *commit_ts_identify(uint8 info);
|
|
|
|
#endif /* COMMITTS_H */
|