1 files changed, 83 insertions, 0 deletions
diff --git a/src/include/postmaster/autovacuum.h b/src/include/postmaster/autovacuum.h
new file mode 100644
index 0000000..7277eff
--- /dev/null
+++ b/src/include/postmaster/autovacuum.h
@@ -0,0 +1,83 @@
+/*-------------------------------------------------------------------------
+ *
+ * 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 */