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/*-------------------------------------------------------------------------
*
* walsummarizer.h
*
* Header file for background WAL summarization process.
*
* Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group
*
* IDENTIFICATION
* src/include/postmaster/walsummarizer.h
*
*-------------------------------------------------------------------------
*/
#ifndef WALSUMMARIZER_H
#define WALSUMMARIZER_H
#include "access/xlogdefs.h"
extern PGDLLIMPORT bool summarize_wal;
extern PGDLLIMPORT int wal_summary_keep_time;
extern Size WalSummarizerShmemSize(void);
extern void WalSummarizerShmemInit(void);
extern void WalSummarizerMain(char *startup_data, size_t startup_data_len) pg_attribute_noreturn();
extern void GetWalSummarizerState(TimeLineID *summarized_tli,
XLogRecPtr *summarized_lsn,
XLogRecPtr *pending_lsn,
int *summarizer_pid);
extern XLogRecPtr GetOldestUnsummarizedLSN(TimeLineID *tli,
bool *lsn_is_exact);
extern void WakeupWalSummarizer(void);
extern void WaitForWalSummarization(XLogRecPtr lsn);
#endif
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