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Sourcecode: postgresql-8.4 version File versions

globals.c

/*-------------------------------------------------------------------------
 *
 * globals.c
 *      global variable declarations
 *
 * Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 *
 * IDENTIFICATION
 *      $PostgreSQL: pgsql/src/backend/utils/init/globals.c,v 1.108 2009/05/05 19:59:00 tgl Exp $
 *
 * NOTES
 *      Globals used all over the place should be declared here and not
 *      in other modules.
 *
 *-------------------------------------------------------------------------
 */
#include "postgres.h"

#include "libpq/pqcomm.h"
#include "miscadmin.h"
#include "storage/backendid.h"


ProtocolVersion FrontendProtocol = PG_PROTOCOL_LATEST;

volatile bool InterruptPending = false;
volatile bool QueryCancelPending = false;
volatile bool ProcDiePending = false;
volatile bool ImmediateInterruptOK = false;
volatile uint32 InterruptHoldoffCount = 0;
volatile uint32 CritSectionCount = 0;

int               MyProcPid;
pg_time_t   MyStartTime;
struct Port *MyProcPort;
long        MyCancelKey;
int               MyPMChildSlot;

/*
 * DataDir is the absolute path to the top level of the PGDATA directory tree.
 * Except during early startup, this is also the server's working directory;
 * most code therefore can simply use relative paths and not reference DataDir
 * explicitly.
 */
char     *DataDir = NULL;

char        OutputFileName[MAXPGPATH];    /* debugging output file */

char        my_exec_path[MAXPGPATH];      /* full path to my executable */
char        pkglib_path[MAXPGPATH];       /* full path to lib directory */

#ifdef EXEC_BACKEND
char        postgres_exec_path[MAXPGPATH];            /* full path to backend */

/* note: currently this is not valid in backend processes */
#endif

BackendId   MyBackendId = InvalidBackendId;

Oid               MyDatabaseId = InvalidOid;

Oid               MyDatabaseTableSpace = InvalidOid;

/*
 * DatabasePath is the path (relative to DataDir) of my database's
 * primary directory, ie, its directory in the default tablespace.
 */
char     *DatabasePath = NULL;

pid_t       PostmasterPid = 0;

/*
 * IsPostmasterEnvironment is true in a postmaster process and any postmaster
 * child process; it is false in a standalone process (bootstrap or
 * standalone backend).  IsUnderPostmaster is true in postmaster child
 * processes.  Note that "child process" includes all children, not only
 * regular backends.  These should be set correctly as early as possible
 * in the execution of a process, so that error handling will do the right
 * things if an error should occur during process initialization.
 *
 * These are initialized for the bootstrap/standalone case.
 */
bool        IsPostmasterEnvironment = false;
bool        IsUnderPostmaster = false;

bool        ExitOnAnyError = false;

int               DateStyle = USE_ISO_DATES;
int               DateOrder = DATEORDER_MDY;
int               IntervalStyle = INTSTYLE_POSTGRES;
bool        HasCTZSet = false;
int               CTimeZone = 0;

bool        enableFsync = true;
bool        allowSystemTableMods = false;
int               work_mem = 1024;
int               maintenance_work_mem = 16384;

/*
 * Primary determinants of sizes of shared-memory structures.  MaxBackends is
 * MaxConnections + autovacuum_max_workers (it is computed by the GUC assign
 * hook):
 */
int               NBuffers = 1000;
int               MaxBackends = 100;
int               MaxConnections = 90;

int               VacuumCostPageHit = 1;        /* GUC parameters for vacuum */
int               VacuumCostPageMiss = 10;
int               VacuumCostPageDirty = 20;
int               VacuumCostLimit = 200;
int               VacuumCostDelay = 0;

int               VacuumCostBalance = 0;        /* working state for vacuum */
bool        VacuumCostActive = false;

int               GinFuzzySearchLimit = 0;

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