1 /*-------------------------------------------------------------------------
4 * global variable declarations
6 * Portions Copyright (c) 1996-2011, PostgreSQL Global Development Group
7 * Portions Copyright (c) 1994, Regents of the University of California
11 * src/backend/utils/init/globals.c
14 * Globals used all over the place should be declared here and not
17 *-------------------------------------------------------------------------
21 #include "catalog/objectaccess.h"
22 #include "libpq/pqcomm.h"
23 #include "miscadmin.h"
24 #include "storage/backendid.h"
27 ProtocolVersion FrontendProtocol;
29 volatile bool InterruptPending = false;
30 volatile bool QueryCancelPending = false;
31 volatile bool ProcDiePending = false;
32 volatile bool ImmediateInterruptOK = false;
33 volatile uint32 InterruptHoldoffCount = 0;
34 volatile uint32 CritSectionCount = 0;
37 pg_time_t MyStartTime;
38 struct Port *MyProcPort;
43 * DataDir is the absolute path to the top level of the PGDATA directory tree.
44 * Except during early startup, this is also the server's working directory;
45 * most code therefore can simply use relative paths and not reference DataDir
50 char OutputFileName[MAXPGPATH]; /* debugging output file */
52 char my_exec_path[MAXPGPATH]; /* full path to my executable */
53 char pkglib_path[MAXPGPATH]; /* full path to lib directory */
56 char postgres_exec_path[MAXPGPATH]; /* full path to backend */
58 /* note: currently this is not valid in backend processes */
61 BackendId MyBackendId = InvalidBackendId;
63 Oid MyDatabaseId = InvalidOid;
65 Oid MyDatabaseTableSpace = InvalidOid;
68 * DatabasePath is the path (relative to DataDir) of my database's
69 * primary directory, ie, its directory in the default tablespace.
71 char *DatabasePath = NULL;
73 pid_t PostmasterPid = 0;
76 * IsPostmasterEnvironment is true in a postmaster process and any postmaster
77 * child process; it is false in a standalone process (bootstrap or
78 * standalone backend). IsUnderPostmaster is true in postmaster child
79 * processes. Note that "child process" includes all children, not only
80 * regular backends. These should be set correctly as early as possible
81 * in the execution of a process, so that error handling will do the right
82 * things if an error should occur during process initialization.
84 * These are initialized for the bootstrap/standalone case.
86 bool IsPostmasterEnvironment = false;
87 bool IsUnderPostmaster = false;
89 bool ExitOnAnyError = false;
91 int DateStyle = USE_ISO_DATES;
92 int DateOrder = DATEORDER_MDY;
93 int IntervalStyle = INTSTYLE_POSTGRES;
94 bool HasCTZSet = false;
97 bool enableFsync = true;
98 bool allowSystemTableMods = false;
100 int maintenance_work_mem = 16384;
103 * Primary determinants of sizes of shared-memory structures. MaxBackends is
104 * MaxConnections + autovacuum_max_workers + 1 (it is computed by the GUC
105 * assign hooks for those variables):
108 int MaxBackends = 100;
109 int MaxConnections = 90;
111 int VacuumCostPageHit = 1; /* GUC parameters for vacuum */
112 int VacuumCostPageMiss = 10;
113 int VacuumCostPageDirty = 20;
114 int VacuumCostLimit = 200;
115 int VacuumCostDelay = 0;
117 int VacuumCostBalance = 0; /* working state for vacuum */
118 bool VacuumCostActive = false;
120 int GinFuzzySearchLimit = 0;
123 * Hook on object accesses. This is intended as infrastructure for security
124 * and logging plugins.
126 object_access_hook_type object_access_hook = NULL;