greenplumn cdbvars 源码

  • 2022-08-18
  • 浏览 (489)

greenplumn cdbvars 代码

文件路径:/src/backend/cdb/cdbvars.c

/*-------------------------------------------------------------------------
 *
 * cdbvars.c
 *	  Provides storage areas and processing routines for Greenplum Database variables
 *	  managed by GUC.
 *
 * Portions Copyright (c) 2003-2010, Greenplum inc
 * Portions Copyright (c) 2012-Present VMware, Inc. or its affiliates.
 *
 *
 * IDENTIFICATION
 *	    src/backend/cdb/cdbvars.c
 *
 *
 * NOTES
 *	  See src/backend/utils/misc/guc.c for variable external specification.
 *
 *-------------------------------------------------------------------------
 */
#include "postgres.h"

#include "miscadmin.h"
#include "utils/guc.h"
#include "cdb/cdbvars.h"
#include "libpq-fe.h"
#include "libpq-int.h"
#include "cdb/cdbfts.h"
#include "cdb/cdbdisp.h"
#include "cdb/cdbutil.h"
#include "cdb/cdbdisp.h"
#include "lib/stringinfo.h"
#include "libpq/libpq-be.h"
#include "postmaster/backoff.h"
#include "utils/resource_manager.h"
#include "utils/resgroup-ops.h"
#include "storage/proc.h"
#include "storage/procarray.h"
#include "cdb/memquota.h"
#include "postmaster/fts.h"

/*
 * ----------------
 *		GUC/global variables
 *
 *	Initial values are set by guc.c function "InitializeGUCOptions" called
 *	*very* early during postmaster, postgres, or bootstrap initialization.
 * ----------------
 */



GpRoleValue Gp_role;			/* Role paid by this Greenplum Database
								 * backend */
char	   *gp_role_string;		/* Staging area for guc.c */

bool		Gp_is_writer;		/* is this qExec a "writer" process. */

int			gp_session_id;		/* global unique id for session. */

char	   *qdHostname;			/* QD hostname */
int			qdPostmasterPort;	/* Master Segment Postmaster port. */

int			gp_command_count;	/* num of commands from client */

bool		gp_debug_pgproc;	/* print debug info for PGPROC */
bool		Debug_print_prelim_plan;	/* Shall we log plan before adding
										 * Motions to subplans? */

bool		Debug_print_slice_table;	/* Shall we log the slice table? */

bool		Debug_resource_group = false;	/* Shall we log the resource group? */

bool		Debug_burn_xids;

bool		gp_external_enable_exec = true; /* allow ext tables with EXECUTE */

bool		verify_gpfdists_cert; /* verifies gpfdist's certificate */

int			gp_external_max_segs;	/* max segdbs per gpfdist/gpfdists URI */

int			gp_safefswritesize; /* set for safe AO writes in non-mature fs */

int			gp_cached_gang_threshold;	/* How many gangs to keep around from
										 * stmt to stmt. */

bool		Gp_write_shared_snapshot;	/* tell the writer QE to write the
										 * shared snapshot */

bool		gp_reraise_signal = false;	/* try to dump core when we get
										 * SIGABRT & SIGSEGV */

bool		gp_set_proc_affinity = false;	/* set processor affinity (if
											 * platform supports it) */

int			gp_reject_percent_threshold;	/* SREH reject % kicks off only
											 * after * <num> records have been
											 * processed	*/

bool		gp_select_invisible = false;	/* debug mode to allow select to
											 * see "invisible" rows */

int         gp_segment_connect_timeout = 180;  /* Maximum time (in seconds) allowed 
												* for a new worker process to start
												* or a mirror to respond.
												*/

/*
 * Configurable timeout for snapshot add: exceptionally busy systems may take
 * longer than our old hard-coded version -- so here is a tuneable version.
 */
int			gp_snapshotadd_timeout = 10;


/*
 * Probe retry count for fts prober.
 */
int			gp_fts_probe_retries = 5;

/*
 * Probe timeout for fts prober.
 */
int			gp_fts_probe_timeout = 20;

/*
 * Polling interval for the fts prober. A scan of the entire system starts
 * every time this expires.
 */
int			gp_fts_probe_interval = 60;

/*
 * If mirror disconnects and re-connects between this period, or just takes
 * this much time during initial connection of cluster start, it will not get
 * reported as down to FTS.
 */
int gp_fts_mark_mirror_down_grace_period = 30;

/*
 * If primary-mirror replication attempts to connect continuously and exceed
 * this count, mark the mirror down to prevent wal sync block.
 * More details please refer to FTSGetReplicationDisconnectTime.
 */
int			gp_fts_replication_attempt_count = 10;

/*
 * Polling interval for the dtx recovery. Checking in dtx recovery starts every
 * time this expires.
 */
int			gp_dtx_recovery_interval = 60;

/*
 * Gather prepared transactions that live longer than the time to find possible
 * orphaned prepared transactions.
 */
int			gp_dtx_recovery_prepared_period = 300;

/*
 * When we have certain types of failures during gang creation which indicate
 * that a segment is in recovery mode we may be able to retry.
 */
int			gp_gang_creation_retry_count = 5;	/* disable by default */
int			gp_gang_creation_retry_timer = 2000;	/* 2000ms */

/*
 * These are GUCs to tune the TCP_KEEPALIVE parameters
 * for QD/QE libpq connections
 */
int			gp_dispatch_keepalives_idle = 0;
int			gp_dispatch_keepalives_interval = 0;
int			gp_dispatch_keepalives_count = 0;

/*
 * gp_enable_slow_writer_testmode
 *
 * In order facilitate testing of reader-gang/writer-gang synchronization,
 * this inserts a pg_usleep call at the start of writer-gang processing.
 */
bool		gp_enable_slow_writer_testmode = false;

/*
 * gp_enable_slow_cursor_testmode
 *
 * In order facilitate testing of reader-gang/writer-gang synchronization,
 * this inserts a pg_usleep call at the start of cursor-gang processing.
 */
bool		gp_enable_slow_cursor_testmode = false;

/*
 * TCP port the Interconnect listens on for incoming connections from other
 * backends.  Assigned by initMotionLayerIPC() at process startup.  This port
 * is used for the duration of this process and should never change.
 */
uint32		Gp_listener_port;

int			Gp_max_packet_size; /* max Interconnect packet size */

int			Gp_interconnect_queue_depth = 4;	/* max number of messages
												 * waiting in rx-queue before
												 * we drop. */
int			Gp_interconnect_snd_queue_depth = 2;
int			Gp_interconnect_timer_period = 5;
int			Gp_interconnect_timer_checking_period = 20;
int			Gp_interconnect_default_rtt = 20;
int			Gp_interconnect_min_rto = 20;
int			Gp_interconnect_fc_method = INTERCONNECT_FC_METHOD_LOSS;
int			Gp_interconnect_transmit_timeout = 3600;
int			Gp_interconnect_min_retries_before_timeout = 100;
int			Gp_interconnect_debug_retry_interval = 10;

int			interconnect_setup_timeout = 7200;

int			Gp_interconnect_type = INTERCONNECT_TYPE_UDPIFC;
int 		Gp_interconnect_address_type = INTERCONNECT_ADDRESS_TYPE_UNICAST;

bool		gp_interconnect_aggressive_retry = true;	/* fast-track app-level
														 * retry */

bool		gp_interconnect_full_crc = false;	/* sanity check UDP data. */

bool		gp_interconnect_log_stats = false;	/* emit stats at log-level */

bool		gp_interconnect_cache_future_packets = true;

/*
 * format: dbid:content:address:port,dbid:content:address:port ...
 * example: 1:-1:10.0.0.1:2000 2:0:10.0.0.2:2000 3:1:10.0.0.2:2001
 *
 * FIXME: at the moment:
 * - the address must be specified as IP;
 */
char	   *gp_interconnect_proxy_addresses = NULL;

int			Gp_udp_bufsize_k;	/* UPD recv buf size, in KB */

#ifdef USE_ASSERT_CHECKING
/*
 * UDP-IC Test hooks (for fault injection).
 *
 * Dropseg: specifies which segment to apply the drop_percent to.
 */
int			gp_udpic_dropseg = UNDEF_SEGMENT;
int			gp_udpic_dropxmit_percent = 0;
int			gp_udpic_dropacks_percent = 0;
int			gp_udpic_fault_inject_percent = 0;
int			gp_udpic_fault_inject_bitmap = 0;
int			gp_udpic_network_disable_ipv6 = 0;
#endif

/*
 * Each slice table has a unique ID (certain commands like "vacuum analyze"
 * run many many slice-tables for each gp_command_id).
 */
uint32		gp_interconnect_id = 0;

/* --------------------------------------------------------------------------------------------------
 * Greenplum Optimizer GUCs
 */

double		gp_motion_cost_per_row = 0;
int			gp_segments_for_planner = 0;

int			gp_hashagg_default_nbatches = 32;

bool		gp_adjust_selectivity_for_outerjoins = true;
bool		gp_selectivity_damping_for_scans = false;
bool		gp_selectivity_damping_for_joins = false;
double		gp_selectivity_damping_factor = 1;
bool		gp_selectivity_damping_sigsort = true;

int			gp_hashjoin_tuples_per_bucket = 5;
int			gp_hashagg_groups_per_bucket = 5;

/* Analyzing aid */
int			gp_motion_slice_noop = 0;

/* Greenplum Database Experimental Feature GUCs */
bool		gp_enable_explain_allstat = false;
bool		gp_enable_motion_deadlock_sanity = false;	/* planning time sanity
														 * check */

bool		gp_enable_tablespace_auto_mkdir = false;

/* Enable check for compatibility of encoding and locale in createdb */
bool		gp_encoding_check_locale_compatibility = true;

/* Priority for the segworkers relative to the postmaster's priority */
int			gp_segworker_relative_priority = PRIO_MAX;

/* Max size of dispatched plans; 0 if no limit */
int			gp_max_plan_size = 0;

/* Disable setting of tuple hints while reading */
bool		gp_disable_tuple_hints = false;

int			gp_workfile_compress_algorithm = 0;
bool		gp_workfile_checksumming = false;
int			gp_workfile_caching_loglevel = DEBUG1;
int			gp_sessionstate_loglevel = DEBUG1;

/* Maximum disk space to use for workfiles on a segment, in kilobytes */
int			gp_workfile_limit_per_segment = 0;

/* Maximum disk space to use for workfiles per query on a segment, in kilobytes */
int			gp_workfile_limit_per_query = 0;

/* Maximum number of workfiles to be created by a query */
int			gp_workfile_limit_files_per_query = 0;

/* Enable single-slice single-row inserts ?*/
bool		gp_enable_fast_sri = true;

/* Enable single-mirror pair dispatch. */
bool		gp_enable_direct_dispatch = true;

/* Force core dump on memory context error */
bool		coredump_on_memerror = false;

/* Experimental feature for MPP-4082. Please read doc before setting this guc */
int			gp_autostats_mode;
char	   *gp_autostats_mode_string;
int			gp_autostats_mode_in_functions;
char	   *gp_autostats_mode_in_functions_string;
int			gp_autostats_on_change_threshold = 100000;
bool		gp_autostats_allow_nonowner = false;
bool		log_autostats = true;

/* --------------------------------------------------------------------------------------------------
 * Server debugging
 */

/*
 * gp_debug_linger (integer)
 *
 * Upon an error with severity FATAL and error code ERRCODE_INTERNAL_ERROR,
 * errfinish() will sleep() for the specified number of seconds before
 * termination, to let the user attach a debugger.
 */
int			gp_debug_linger = 30;

/* ----------------
 * Non-GUC globals
 */

int			currentSliceId = UNSET_SLICE_ID;	/* used by elog to show the
												 * current slice the process
												 * is executing. */

bool		gp_cost_hashjoin_chainwalk = false;

/* ----------------
 * This variable is initialized by the postmaster from command line arguments
 *
 * Any code needing the "numsegments"
 * can simply #include cdbvars.h, and use GpIdentity.numsegments
 */
GpId		GpIdentity = {UNINITIALIZED_GP_IDENTITY_VALUE, UNINITIALIZED_GP_IDENTITY_VALUE};

/*
 * Keep track of a few dispatch-related  statistics:
 */
int			cdb_total_slices = 0;
int			cdb_total_plans = 0;
int			cdb_max_slices = 0;

/*
 * Local macro to provide string values of numeric defines.
 */
#define CppNumericAsString(s) CppAsString(s)

/*
 *	Forward declarations of local function.
 */
static GpRoleValue string_to_role(const char *string);


/*
 * Convert a Greenplum Database role string (as for gp_role) to an
 * enum value of type GpRoleValue. Return GP_ROLE_UNDEFINED in case the
 * string is unrecognized.
 */
static GpRoleValue
string_to_role(const char *string)
{
	GpRoleValue role = GP_ROLE_UNDEFINED;

	if (pg_strcasecmp(string, "dispatch") == 0)
		role = GP_ROLE_DISPATCH;
	else if (pg_strcasecmp(string, "execute") == 0)
		role = GP_ROLE_EXECUTE;
	else if (pg_strcasecmp(string, "utility") == 0)
		role = GP_ROLE_UTILITY;

	return role;
}

/*
 * Convert a GpRoleValue to a role string (as for gp_role).  Return eyecatcher
 * in the unexpected event that the value is unknown or undefined.
 */
const char *
role_to_string(GpRoleValue role)
{
	switch (role)
	{
		case GP_ROLE_DISPATCH:
			return "dispatch";
		case GP_ROLE_EXECUTE:
			return "execute";
		case GP_ROLE_UTILITY:
			return "utility";
		case GP_ROLE_UNDEFINED:
		default:
			return "undefined";
	}
}

bool
check_gp_role(char **newval, void **extra, GucSource source)
{
	GpRoleValue newrole = string_to_role(*newval);

	/* Force utility mode in a stand-alone backend. */
	if (!IsPostmasterEnvironment && newrole != GP_ROLE_UTILITY)
	{
		elog(LOG, "gp_role forced to 'utility' in single-user mode");
		*newval = strdup("utility");
		return true;
	}

	if (source == PGC_S_DEFAULT)
		return true;
	else if (Gp_role == GP_ROLE_UNDEFINED)
		return (newrole != GP_ROLE_UNDEFINED);
	else /* can only downgrade to utility. */
		return (newrole == GP_ROLE_UTILITY);
}

void
assign_gp_role(const char *newval, void *extra)
{
	Gp_role = string_to_role(newval);

	if (Gp_role == GP_ROLE_UTILITY && MyProc != NULL)
		MyProc->mppIsWriter = false;
}

/*
 * Show hook routine for "gp_role" option.
 *
 * See src/backend/util/misc/guc.c for option definition.
 */
const char *
show_gp_role(void)
{
	return role_to_string(Gp_role);
}



/* --------------------------------------------------------------------------------------------------
 * Logging
 */


/*
 * gp_log_gangs (string)
 *
 * Should creation, reallocation and cleanup of gangs of QE processes be logged?
 * "OFF"	 -> only errors are logged
 * "TERSE"	 -> terse logging of routine events, e.g. creation of new qExecs
 * "VERBOSE" -> gang allocation per command is logged
 * "DEBUG"	 -> additional events are logged at severity level DEBUG1 to DEBUG5
 *
 * The messages that are enabled by the TERSE and VERBOSE settings are
 * written with a severity level of LOG.
 */
int gp_log_gang;

/*
 * gp_log_fts (string)
 *
 * What kind of messages should the fault-prober log ?
 * "OFF"	 -> only errors are logged
 * "TERSE"	 -> terse logging of routine events
 * "VERBOSE" -> gang allocation per command is logged
 * "DEBUG"	 -> additional events are logged at severity level DEBUG1 to DEBUG5
 *
 * The messages that are enabled by the TERSE and VERBOSE settings are
 * written with a severity level of LOG.
 */
int gp_log_fts;

/*
 * gp_log_interconnect (string)
 *
 * Should connections between internal processes be logged?  (qDisp/qExec/etc)
 * "OFF"	 -> connection errors are logged
 * "TERSE"	 -> terse logging of routine events, e.g. successful connections
 * "VERBOSE" -> most interconnect setup events are logged
 * "DEBUG"	 -> additional events are logged at severity level DEBUG1 to DEBUG5.
 *
 * The messages that are enabled by the TERSE and VERBOSE settings are
 * written with a severity level of LOG.
 */
int gp_log_interconnect;

/*
 * gpvars_check_gp_resource_manager_policy
 * gpvars_assign_gp_resource_manager_policy
 * gpvars_show_gp_resource_manager_policy
 */
bool
gpvars_check_gp_resource_manager_policy(char **newval, void **extra, GucSource source)
{
	if (*newval == NULL ||
		*newval[0] == 0 ||
		!pg_strcasecmp("queue", *newval) ||
		!pg_strcasecmp("group", *newval))
		return true;

	GUC_check_errmsg("invalid value for resource manager policy: \"%s\"", *newval);
	return false;
}

void
gpvars_assign_gp_resource_manager_policy(const char *newval, void *extra)
{
	/*
	 * Probe resgroup configurations even not in resgroup mode,
	 * variables like gp_resource_group_enable_cgroup_memory need to
	 * be properly set in all modes.
	 */
	ResGroupOps_Probe();

	if (newval == NULL || newval[0] == 0)
		Gp_resource_manager_policy = RESOURCE_MANAGER_POLICY_QUEUE;
	else if (!pg_strcasecmp("queue", newval))
		Gp_resource_manager_policy = RESOURCE_MANAGER_POLICY_QUEUE;
	else if (!pg_strcasecmp("group", newval))
	{
		ResGroupOps_Bless();
		Gp_resource_manager_policy = RESOURCE_MANAGER_POLICY_GROUP;
		gp_enable_resqueue_priority = false;
	}
	/*
	 * No else should happen, since newval has been checked in check_hook.
	 */
}

const char *
gpvars_show_gp_resource_manager_policy(void)
{
	switch (Gp_resource_manager_policy)
	{
		case RESOURCE_MANAGER_POLICY_QUEUE:
			return "queue";
		case RESOURCE_MANAGER_POLICY_GROUP:
			return "group";
		default:
			Assert(!"unexpected resource manager policy");
			return "unknown";
	}
}

/*
 * gpvars_assign_statement_mem
 */
bool
gpvars_check_statement_mem(int *newval, void **extra, GucSource source)
{
	if (*newval >= max_statement_mem)
	{
		GUC_check_errmsg("Invalid input for statement_mem, must be less than max_statement_mem (%d kB)",
						 max_statement_mem);
	}

	return true;
}

/*
 * increment_command_count
 *	  Increment gp_command_count. If the new command count is 0 or a negative number, reset it to 1.
 *	  And keep MyProc->queryCommandId synced with gp_command_count.
 */
void
increment_command_count()
{
	gp_command_count++;
	if (gp_command_count <= 0)
		gp_command_count = 1;

	/*
	 * No need to maintain MyProc->queryCommandId elsewhere, we guarantee
	 * they are always synced here.
	 */
	MyProc->queryCommandId = gp_command_count;
}

Datum mpp_execution_segment(PG_FUNCTION_ARGS);
Datum gp_execution_dbid(PG_FUNCTION_ARGS);

/*
 * Implements the gp_execution_segment() function to return the contentid
 * of the current executing segment.
 */
Datum
mpp_execution_segment(PG_FUNCTION_ARGS)
{
	PG_RETURN_INT32(GpIdentity.segindex);
}

/*
 * Implements the gp_execution_dbid() function to return the dbid of the
 * current executing segment.
 */
Datum
gp_execution_dbid(PG_FUNCTION_ARGS)
{
	PG_RETURN_INT32(GpIdentity.dbid);
}

相关信息

greenplumn 源码目录

相关文章

greenplumn cdbappendonlystorageformat 源码

greenplumn cdbappendonlystorageread 源码

greenplumn cdbappendonlystoragewrite 源码

greenplumn cdbappendonlyxlog 源码

greenplumn cdbbufferedappend 源码

greenplumn cdbbufferedread 源码

greenplumn cdbcat 源码

greenplumn cdbcopy 源码

greenplumn cdbdistributedsnapshot 源码

greenplumn cdbdistributedxacts 源码

0  赞