src/include/postmaster/walsummarizer.h

   1 /*-------------------------------------------------------------------------
   2  *
   3  * walsummarizer.h
   4  *
   5  * Header file for background WAL summarization process.
   6  *
   7  * Portions Copyright (c) 1996-2025, PostgreSQL Global Development Group
   8  *
   9  * IDENTIFICATION
  10  *        src/include/postmaster/walsummarizer.h
  11  *
  12  *-------------------------------------------------------------------------
  13  */
  14 #ifndef WALSUMMARIZER_H
  15 #define WALSUMMARIZER_H
  16
  17 #include "access/xlogdefs.h"
  18
  19 extern PGDLLIMPORT bool summarize_wal;
  20 extern PGDLLIMPORT int wal_summary_keep_time;
  21
  22 extern Size WalSummarizerShmemSize(void);
  23 extern void WalSummarizerShmemInit(void);
  24 extern void WalSummarizerMain(char *startup_data, size_t startup_data_len) pg_attribute_noreturn();
  25
  26 extern void GetWalSummarizerState(TimeLineID *summarized_tli,
  27                                                                   XLogRecPtr *summarized_lsn,
  28                                                                   XLogRecPtr *pending_lsn,
  29                                                                   int *summarizer_pid);
  30 extern XLogRecPtr GetOldestUnsummarizedLSN(TimeLineID *tli,
  31                                                                                    bool *lsn_is_exact);
  32 extern void WakeupWalSummarizer(void);
  33 extern void WaitForWalSummarization(XLogRecPtr lsn);
  34
  35 #endif