init

pg_include/postmaster/autovacuum.h

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+/*-------------------------------------------------------------------------
+ *
+ * autovacuum.h
+ *	  header file for integrated autovacuum daemon
+ *
+ *
+ * Portions Copyright (c) 1996-2012, 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
+
+
+/* GUC variables */
+extern bool autovacuum_start_daemon;
+extern int	autovacuum_max_workers;
+extern int	autovacuum_naptime;
+extern int	autovacuum_vac_thresh;
+extern double autovacuum_vac_scale;
+extern int	autovacuum_anl_thresh;
+extern double autovacuum_anl_scale;
+extern int	autovacuum_freeze_max_age;
+extern int	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[]);
+extern void AutoVacWorkerMain(int argc, char *argv[]);
+extern void AutovacuumWorkerIAm(void);
+extern void AutovacuumLauncherIAm(void);
+#endif
+
+/* shared memory stuff */
+extern Size AutoVacuumShmemSize(void);
+extern void AutoVacuumShmemInit(void);
+
+#endif   /* AUTOVACUUM_H */