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/*-------------------------------------------------------------------------
*
* autovacuum.h
* header file for integrated autovacuum daemon
*
*
* Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/include/postmaster/autovacuum.h
*
*-------------------------------------------------------------------------
*/
#ifndef AUTOVACUUM_H
#define AUTOVACUUM_H
#include "storage/block.h"
/*
* Other processes can request specific work from autovacuum, identified by
* AutoVacuumWorkItem elements.
*/
typedef enum
{
AVW_BRINSummarizeRange
} AutoVacuumWorkItemType;
/* GUC variables */
extern bool autovacuum_start_daemon;
extern int autovacuum_max_workers;
extern int autovacuum_work_mem;
extern int autovacuum_naptime;
extern int autovacuum_vac_thresh;
extern double autovacuum_vac_scale;
extern int autovacuum_vac_ins_thresh;
extern double autovacuum_vac_ins_scale;
extern int autovacuum_anl_thresh;
extern double autovacuum_anl_scale;
extern int autovacuum_freeze_max_age;
extern int autovacuum_multixact_freeze_max_age;
extern double autovacuum_vac_cost_delay;
extern int autovacuum_vac_cost_limit;
/* autovacuum launcher PID, only valid when worker is shutting down */
extern int AutovacuumLauncherPid;
extern int Log_autovacuum_min_duration;
/* Status inquiry functions */
extern bool AutoVacuumingActive(void);
extern bool IsAutoVacuumLauncherProcess(void);
extern bool IsAutoVacuumWorkerProcess(void);
#define IsAnyAutoVacuumProcess() \
(IsAutoVacuumLauncherProcess() || IsAutoVacuumWorkerProcess())
/* Functions to start autovacuum process, called from postmaster */
extern void autovac_init(void);
extern int StartAutoVacLauncher(void);
extern int StartAutoVacWorker(void);
/* called from postmaster when a worker could not be forked */
extern void AutoVacWorkerFailed(void);
/* autovacuum cost-delay balancer */
extern void AutoVacuumUpdateDelay(void);
#ifdef EXEC_BACKEND
extern void AutoVacLauncherMain(int argc, char *argv[]) pg_attribute_noreturn();
extern void AutoVacWorkerMain(int argc, char *argv[]) pg_attribute_noreturn();
extern void AutovacuumWorkerIAm(void);
extern void AutovacuumLauncherIAm(void);
#endif
extern bool AutoVacuumRequestWork(AutoVacuumWorkItemType type,
Oid relationId, BlockNumber blkno);
/* shared memory stuff */
extern Size AutoVacuumShmemSize(void);
extern void AutoVacuumShmemInit(void);
#endif /* AUTOVACUUM_H */
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