152 lines
4.5 KiB
C
152 lines
4.5 KiB
C
/*-------------------------------------------------------------------------
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*
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* globals.c
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* global variable declarations
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*
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* Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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*
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* IDENTIFICATION
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* src/backend/utils/init/globals.c
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*
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* NOTES
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* Globals used all over the place should be declared here and not
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* in other modules.
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*
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*-------------------------------------------------------------------------
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*/
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#include "postgres.h"
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#include "common/file_perm.h"
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#include "libpq/libpq-be.h"
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#include "libpq/pqcomm.h"
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#include "miscadmin.h"
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#include "storage/backendid.h"
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ProtocolVersion FrontendProtocol;
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volatile sig_atomic_t InterruptPending = false;
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volatile sig_atomic_t QueryCancelPending = false;
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volatile sig_atomic_t ProcDiePending = false;
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volatile sig_atomic_t ClientConnectionLost = false;
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volatile sig_atomic_t IdleInTransactionSessionTimeoutPending = false;
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volatile sig_atomic_t ProcSignalBarrierPending = false;
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volatile uint32 InterruptHoldoffCount = 0;
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volatile uint32 QueryCancelHoldoffCount = 0;
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volatile uint32 CritSectionCount = 0;
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int MyProcPid;
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pg_time_t MyStartTime;
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TimestampTz MyStartTimestamp;
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struct Port *MyProcPort;
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int32 MyCancelKey;
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int MyPMChildSlot;
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/*
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* MyLatch points to the latch that should be used for signal handling by the
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* current process. It will either point to a process local latch if the
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* current process does not have a PGPROC entry in that moment, or to
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* PGPROC->procLatch if it has. Thus it can always be used in signal handlers,
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* without checking for its existence.
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*/
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struct Latch *MyLatch;
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/*
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* DataDir is the absolute path to the top level of the PGDATA directory tree.
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* Except during early startup, this is also the server's working directory;
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* most code therefore can simply use relative paths and not reference DataDir
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* explicitly.
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*/
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char *DataDir = NULL;
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/*
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* Mode of the data directory. The default is 0700 but it may be changed in
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* checkDataDir() to 0750 if the data directory actually has that mode.
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*/
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int data_directory_mode = PG_DIR_MODE_OWNER;
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char OutputFileName[MAXPGPATH]; /* debugging output file */
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char my_exec_path[MAXPGPATH]; /* full path to my executable */
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char pkglib_path[MAXPGPATH]; /* full path to lib directory */
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#ifdef EXEC_BACKEND
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char postgres_exec_path[MAXPGPATH]; /* full path to backend */
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/* note: currently this is not valid in backend processes */
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#endif
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BackendId MyBackendId = InvalidBackendId;
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BackendId ParallelLeaderBackendId = InvalidBackendId;
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Oid MyDatabaseId = InvalidOid;
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Oid MyDatabaseTableSpace = InvalidOid;
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/*
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* DatabasePath is the path (relative to DataDir) of my database's
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* primary directory, ie, its directory in the default tablespace.
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*/
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char *DatabasePath = NULL;
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pid_t PostmasterPid = 0;
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/*
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* IsPostmasterEnvironment is true in a postmaster process and any postmaster
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* child process; it is false in a standalone process (bootstrap or
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* standalone backend). IsUnderPostmaster is true in postmaster child
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* processes. Note that "child process" includes all children, not only
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* regular backends. These should be set correctly as early as possible
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* in the execution of a process, so that error handling will do the right
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* things if an error should occur during process initialization.
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*
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* These are initialized for the bootstrap/standalone case.
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*/
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bool IsPostmasterEnvironment = false;
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bool IsUnderPostmaster = false;
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bool IsBinaryUpgrade = false;
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bool IsBackgroundWorker = false;
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bool ExitOnAnyError = false;
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int DateStyle = USE_ISO_DATES;
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int DateOrder = DATEORDER_MDY;
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int IntervalStyle = INTSTYLE_POSTGRES;
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bool enableFsync = true;
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bool allowSystemTableMods = false;
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int work_mem = 4096;
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double hash_mem_multiplier = 1.0;
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int maintenance_work_mem = 65536;
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int max_parallel_maintenance_workers = 2;
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/*
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* Primary determinants of sizes of shared-memory structures.
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*
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* MaxBackends is computed by PostmasterMain after modules have had a chance to
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* register background workers.
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*/
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int NBuffers = 1000;
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int MaxConnections = 90;
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int max_worker_processes = 8;
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int max_parallel_workers = 8;
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int MaxBackends = 0;
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int VacuumCostPageHit = 1; /* GUC parameters for vacuum */
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int VacuumCostPageMiss = 10;
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int VacuumCostPageDirty = 20;
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int VacuumCostLimit = 200;
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double VacuumCostDelay = 0;
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int64 VacuumPageHit = 0;
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int64 VacuumPageMiss = 0;
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int64 VacuumPageDirty = 0;
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int VacuumCostBalance = 0; /* working state for vacuum */
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bool VacuumCostActive = false;
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double vacuum_cleanup_index_scale_factor;
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