PostgreSQL Source Code: src/include/access/xlogprefetcher.h Source File

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xlogprefetcher.h
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1/*-------------------------------------------------------------------------
2 *
3 * xlogprefetcher.h
4 * Declarations for the recovery prefetching module.
5 *
6 * Portions Copyright (c) 2022-2025, PostgreSQL Global Development Group
7 * Portions Copyright (c) 1994, Regents of the University of California
8 *
9 * IDENTIFICATION
10 * src/include/access/xlogprefetcher.h
11 *-------------------------------------------------------------------------
12 */
13#ifndef XLOGPREFETCHER_H
14#define XLOGPREFETCHER_H
15
16#include "access/xlogdefs.h"
17#include "access/xlogreader.h"
18#include "access/xlogrecord.h"
19
20/* GUCs */
21extern PGDLLIMPORT int recovery_prefetch;
22
23/* Possible values for recovery_prefetch */
24 typedef enum
25{
26 RECOVERY_PREFETCH_OFF,
27 RECOVERY_PREFETCH_ON,
28 RECOVERY_PREFETCH_TRY,
29} RecoveryPrefetchValue;
30
31struct XLogPrefetcher;
32 typedef struct XLogPrefetcher XLogPrefetcher;
33
34
35extern void XLogPrefetchReconfigure(void);
36
37extern size_t XLogPrefetchShmemSize(void);
38extern void XLogPrefetchShmemInit(void);
39
40extern void XLogPrefetchResetStats(void);
41
42extern XLogPrefetcher *XLogPrefetcherAllocate(XLogReaderState *reader);
43extern void XLogPrefetcherFree(XLogPrefetcher *prefetcher);
44
45extern XLogReaderState *XLogPrefetcherGetReader(XLogPrefetcher *prefetcher);
46
47extern void XLogPrefetcherBeginRead(XLogPrefetcher *prefetcher,
48 XLogRecPtr recPtr);
49
50extern XLogRecord *XLogPrefetcherReadRecord(XLogPrefetcher *prefetcher,
51 char **errmsg);
52
53extern void XLogPrefetcherComputeStats(XLogPrefetcher *prefetcher);
54
55#endif
#define PGDLLIMPORT
Definition: c.h:1319
int errmsg(const char *fmt,...)
Definition: elog.c:1071
XLogReaderState * reader
uint64 XLogRecPtr
Definition: xlogdefs.h:21
void XLogPrefetchResetStats(void)
void XLogPrefetcherComputeStats(XLogPrefetcher *prefetcher)
XLogPrefetcher * XLogPrefetcherAllocate(XLogReaderState *reader)
void XLogPrefetchReconfigure(void)
size_t XLogPrefetchShmemSize(void)
XLogRecord * XLogPrefetcherReadRecord(XLogPrefetcher *prefetcher, char **errmsg)
XLogReaderState * XLogPrefetcherGetReader(XLogPrefetcher *prefetcher)
void XLogPrefetchShmemInit(void)
void XLogPrefetcherBeginRead(XLogPrefetcher *prefetcher, XLogRecPtr recPtr)
PGDLLIMPORT int recovery_prefetch
Definition: xlogprefetcher.c:68
void XLogPrefetcherFree(XLogPrefetcher *prefetcher)
RecoveryPrefetchValue
Definition: xlogprefetcher.h:25
@ RECOVERY_PREFETCH_OFF
Definition: xlogprefetcher.h:26
@ RECOVERY_PREFETCH_ON
Definition: xlogprefetcher.h:27
@ RECOVERY_PREFETCH_TRY
Definition: xlogprefetcher.h:28

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