Re: Database Failure on Windows XP Pro psql (PostgreSQL)

Brandon Aiken wrote:
> If you are suffering from this particular error, you will see an entry
> in the event log. Look for an error from Tcpip with an ID of 4226. The
> message will say "TCP/IP has reached the security limit imposed on the
> number of concurrent (incomplete) TCP connect attempts.". If you do not
> see this message, you are not hitting this limit.
>
> See:
> http://www.microsoft.com/products/ee/transform.aspx?ProdName=Windows%20O
> perating%20System&ProdVer=5.1.2600.2180&EvtID=4226&EvtSrc=Tcpip&FileVer=
> 5.1.2600.2180&FileName=xpsp2res.dll&EvtType=Warning&LCID=
>
> The limit is 10 outbound half-open connections. Typically, you will
> only see this limit if you're running a server or using P2P apps. The
> other limit is a maximum of 10 connections to the Server component
> (which does file and print sharing; people were using Win2k Pro as a
> file and print server). The only way to modify the limit is to manually
> modify binary files.
>
> --
> Brandon Aiken
> CS/IT Systems Engineer
>
> -----Original Message-----
> From: pgsql-general-owner(at)postgresql(dot)org
> [mailto:pgsql-general-owner(at)postgresql(dot)org] On Behalf Of Shelby Cain
> Sent: Monday, January 08, 2007 3:12 PM
> To: Oisin Glynn; pgsql-general(at)postgresql(dot)org
> Subject: Re: [GENERAL] Database Failure on Windows XP Pro psql
> (PostgreSQL) 8.1.4
>
> I'm just throwing this out here... but the usual suspects for strange
> connection issues like these would be a software firewall or antivirus
> (especially AV software that has anti-worm features).
>
> Also, Windows XP Pro isn't really viable as a server OS as Microsoft has
> intentionally limited certain features of the TCP/IP stack (e.g.: low
> limits for the TCP connection backlog). In theory, if you had a flood
> of incoming connections only some of them would be serviced correctly
> before the backlog limit was reached.
>
> Regards,
>
> Shelby Cain
>
> ----- Original Message ----
> From: Oisin Glynn <me(at)oisinglynn(dot)com>
> To: pgsql-general(at)postgresql(dot)org
> Sent: Monday, January 8, 2007 1:33:54 PM
> Subject: [GENERAL] Database Failure on Windows XP Pro psql (PostgreSQL)
> 8.1.4
>
> I am running postgres on Windows XP and have been for quite a while as
>
> the database engine for our application.
>
> On an ODBC connection the following error has started happening. The gap
>
> in activity is normal for our application. but the connection failing is
>
> a first we have this application live in approx 5 locations some for as
> long as 12 months (though only 2 live are on XP)
>
> We did enable the system to check for Windows updates automatically
> recently not sure if this could be a factor.
> There is another one of our apps connecting through the C++ API which is
>
> not seeing any loss of service. I suspect some sort of tcp-ip issue as
> I cannot connect with PgAdminIII locally on the server once the
> condition occurs. I have had this 3 times now and it seems to be
> happening very 2-3hours of operation. I am not getting any eventvwr or
> other Windows errors telling me I am hitting a limit or such? And when
> I restarted the Postgresql service I got the following as part of my
> log(See attached logs)
>
> 2007-01-05 14:38:28 LOG: pgpipe failed to bind: 10055i
> 2007-01-05 14:38:28 FATAL: could not create pipe for statistics buffer:
>
> No error
>
> I am attaching my postgresql.conf (perhaps I can turn on some more
> logging to make things easier to spot) and the log files I have from the
>
> first occurrence. These show my attempts to restart the postgresql
> service and the errors I received.
>
> This is a snipit of my applications log file showing the error pop up at
>
> 14:11:07
>
> 01/05/07 13:58:57.453 2296 DEBUG - Call No: 10131 SELECT SQL =
> SELECT * FROM zfunc_access_mailbox_cleanup(10131)
> 01/05/07 13:58:57.468 2296 DEBUG - Call No: 10131 SELECT Complete
> Return Code = $VC1
> 01/05/07 13:58:57.468 2296 DEBUG - BX_SVR_TRP009 Sent TRP_IVR_ODBCOK
> for call no= 10131
> 01/05/07 13:58:57.484 2296 DEBUG - Call No: 10131 DISCONNECT
> 01/05/07 13:58:57.484 2296 DEBUG - Call No: 10131 DISCONNECT Free
> Statement Handle
> 01/05/07 13:58:57.484 2296 DEBUG - Call No: 10131DISCONNECT OK
> Voicemail
> 01/05/07 13:58:57.484 2296 DEBUG - BX_SVR_TRP009 Sent TRP_IVR_ODBCOK
> for call no= 10131
> 01/05/07 14:11:07.734 2296 DEBUG - Call No: 10132 CONNECT Voicemail
> 01/05/07 14:11:07.734 2296 DEBUG - Call No: 10132 CONNECT Allocate DBC
>
> Handle Voicemail
> 01/05/07 14:11:07.734 2296 DEBUG - Call No: 10132 CONNECT Connect
> Voicemail
> 01/05/07 14:11:07.750 2296 DEBUG - Call No: 10132CONNECT SQLConnect
> failed 08001 could not connect to server: No buffer space available
> (0x00002747/10055)
> Is the server running on host "127.0.0.1" and accepting
> TCP/IP connections on port 5432?
> Error Message = 165Voicemail
>
> If there is anything I can do to generate better logging I am all ears,
>
> Oisin
>
>
>
>
>
>
> # -----------------------------
> # PostgreSQL configuration file
> # -----------------------------
> #
> # This file consists of lines of the form:
> #
> # name = value
> #
> # (The '=' is optional.) White space may be used. Comments are
> introduced
> # with '#' anywhere on a line. The complete list of option names and
> # allowed values can be found in the PostgreSQL documentation. The
> # commented-out settings shown in this file represent the default
> values.
> #
> # Please note that re-commenting a setting is NOT sufficient to revert
> it
> # to the default value, unless you restart the postmaster.
> #
> # Any option can also be given as a command line switch to the
> # postmaster, e.g. 'postmaster -c log_connections=on'. Some options
> # can be changed at run-time with the 'SET' SQL command.
> #
> # This file is read on postmaster startup and when the postmaster
> # receives a SIGHUP. If you edit the file on a running system, you have
> # to SIGHUP the postmaster for the changes to take effect, or use
> # "pg_ctl reload". Some settings, such as listen_addresses, require
> # a postmaster shutdown and restart to take effect.
>
>
> #-----------------------------------------------------------------------
> ----
> # FILE LOCATIONS
> #-----------------------------------------------------------------------
> ----
>
> # The default values of these variables are driven from the -D command
> line
> # switch or PGDATA environment variable, represented here as ConfigDir.
>
> #data_directory = 'ConfigDir' # use data in another directory
> #hba_file = 'ConfigDir/pg_hba.conf' # host-based authentication file
> #ident_file = 'ConfigDir/pg_ident.conf' # IDENT configuration file
>
> # If external_pid_file is not explicitly set, no extra pid file is
> written.
> #external_pid_file = '(none)' # write an extra pid file
>
>
> #-----------------------------------------------------------------------
> ----
> # CONNECTIONS AND AUTHENTICATION
> #-----------------------------------------------------------------------
> ----
>
> # - Connection Settings -
>
> #listen_addresses = 'localhost' # what IP address(es) to listen
> on;
> # comma-separated list of addresses;
> # defaults to 'localhost', '*' = all
> port = 5432
> max_connections = 100
> # note: increasing max_connections costs ~400 bytes of shared memory per
>
> # connection slot, plus lock space (see max_locks_per_transaction). You
> # might also need to raise shared_buffers to support more connections.
> #superuser_reserved_connections = 2
> #unix_socket_directory = ''
> #unix_socket_group = ''
> #unix_socket_permissions = 0777 # octal
> #bonjour_name = '' # defaults to the computer name
>
> # - Security & Authentication -
>
> #authentication_timeout = 60 # 1-600, in seconds
> #ssl = off
> #password_encryption = on
> #db_user_namespace = off
>
> # Kerberos
> #krb_server_keyfile = ''
> #krb_srvname = 'postgres'
> #krb_server_hostname = '' # empty string matches any keytab entry
> #krb_caseins_users = off
>
> # - TCP Keepalives -
> # see 'man 7 tcp' for details
>
> #tcp_keepalives_idle = 0 # TCP_KEEPIDLE, in seconds;
> # 0 selects the system default
> #tcp_keepalives_interval = 0 # TCP_KEEPINTVL, in seconds;
> # 0 selects the system default
> #tcp_keepalives_count = 0 # TCP_KEEPCNT;
> # 0 selects the system default
>
>
> #-----------------------------------------------------------------------
> ----
> # RESOURCE USAGE (except WAL)
> #-----------------------------------------------------------------------
> ----
>
> # - Memory -
>
> shared_buffers = 1000 # min 16 or max_connections*2, 8KB each
> #temp_buffers = 1000 # min 100, 8KB each
> #max_prepared_transactions = 5 # can be 0 or more
> # note: increasing max_prepared_transactions costs ~600 bytes of shared
> memory
> # per transaction slot, plus lock space (see max_locks_per_transaction).
> #work_mem = 1024 # min 64, size in KB
> #maintenance_work_mem = 16384 # min 1024, size in KB
> #max_stack_depth = 2048 # min 100, size in KB
>
> # - Free Space Map -
>
> #max_fsm_pages = 20000 # min max_fsm_relations*16, 6 bytes
> each
> #max_fsm_relations = 1000 # min 100, ~70 bytes each
>
> # - Kernel Resource Usage -
>
> #max_files_per_process = 1000 # min 25
> #preload_libraries = ''
>
> # - Cost-Based Vacuum Delay -
>
> #vacuum_cost_delay = 0 # 0-1000 milliseconds
> #vacuum_cost_page_hit = 1 # 0-10000 credits
> #vacuum_cost_page_miss = 10 # 0-10000 credits
> #vacuum_cost_page_dirty = 20 # 0-10000 credits
> #vacuum_cost_limit = 200 # 0-10000 credits
>
> # - Background writer -
>
> #bgwriter_delay = 200 # 10-10000 milliseconds between rounds
> #bgwriter_lru_percent = 1.0 # 0-100% of LRU buffers scanned/round
> #bgwriter_lru_maxpages = 5 # 0-1000 buffers max written/round
> #bgwriter_all_percent = 0.333 # 0-100% of all buffers
> scanned/round
> #bgwriter_all_maxpages = 5 # 0-1000 buffers max written/round
>
>
> #-----------------------------------------------------------------------
> ----
> # WRITE AHEAD LOG
> #-----------------------------------------------------------------------
> ----
>
> # - Settings -
>
> #fsync = on # turns forced synchronization on or off
> #wal_sync_method = fsync # the default is the first option
> # supported by the operating system:
> # open_datasync
> # fdatasync
> # fsync
> # fsync_writethrough
> # open_sync
> #full_page_writes = on # recover from partial page writes
> #wal_buffers = 8 # min 4, 8KB each
> #commit_delay = 0 # range 0-100000, in microseconds
> #commit_siblings = 5 # range 1-1000
>
> # - Checkpoints -
>
> #checkpoint_segments = 3 # in logfile segments, min 1, 16MB each
> #checkpoint_timeout = 300 # range 30-3600, in seconds
> #checkpoint_warning = 30 # in seconds, 0 is off
>
> # - Archiving -
>
> #archive_command = '' # command to use to archive a logfile
> # segment
>
>
> #-----------------------------------------------------------------------
> ----
> # QUERY TUNING
> #-----------------------------------------------------------------------
> ----
>
> # - Planner Method Configuration -
>
> #enable_bitmapscan = on
> #enable_hashagg = on
> #enable_hashjoin = on
> #enable_indexscan = on
> #enable_mergejoin = on
> #enable_nestloop = on
> #enable_seqscan = on
> #enable_sort = on
> #enable_tidscan = on
>
> # - Planner Cost Constants -
>
> #effective_cache_size = 1000 # typically 8KB each
> #random_page_cost = 4 # units are one sequential page fetch
> # cost
> #cpu_tuple_cost = 0.01 # (same)
> #cpu_index_tuple_cost = 0.001 # (same)
> #cpu_operator_cost = 0.0025 # (same)
>
> # - Genetic Query Optimizer -
>
> #geqo = on
> #geqo_threshold = 12
> #geqo_effort = 5 # range 1-10
> #geqo_pool_size = 0 # selects default based on effort
> #geqo_generations = 0 # selects default based on effort
> #geqo_selection_bias = 2.0 # range 1.5-2.0
>
> # - Other Planner Options -
>
> #default_statistics_target = 10 # range 1-1000
> #constraint_exclusion = off
> #from_collapse_limit = 8
> #join_collapse_limit = 8 # 1 disables collapsing of explicit
> # JOINs
>
>
> #-----------------------------------------------------------------------
> ----
> # ERROR REPORTING AND LOGGING
> #-----------------------------------------------------------------------
> ----
>
> # - Where to Log -
>
> log_destination = 'stderr' # Valid values are combinations of
> # stderr, syslog and eventlog,
> # depending on platform.
>
> # This is used when logging to stderr:
> redirect_stderr = on # Enable capturing of stderr into log
> # files
>
> # These are only used if redirect_stderr is on:
> #log_directory = 'pg_log' # Directory where log files are written
> # Can be absolute or relative to PGDATA
> #log_filename = 'postgresql-%Y-%m-%d_%H%M%S.log' # Log file name
> pattern.
> # Can include strftime() escapes
> #log_truncate_on_rotation = off # If on, any existing log file of the
> same
> # name as the new log file will be
> # truncated rather than appended to. But
> # such truncation only occurs on
> # time-driven rotation, not on restarts
> # or size-driven rotation. Default is
> # off, meaning append to existing files
> # in all cases.
> #log_rotation_age = 1440 # Automatic rotation of logfiles will
> # happen after so many minutes. 0 to
> # disable.
> #log_rotation_size = 10240 # Automatic rotation of logfiles will
> # happen after so many kilobytes of log
> # output. 0 to disable.
>
> # These are relevant when logging to syslog:
> #syslog_facility = 'LOCAL0'
> #syslog_ident = 'postgres'
>
>
> # - When to Log -
>
> #client_min_messages = notice # Values, in order of decreasing
> detail:
> # debug5
> # debug4
> # debug3
> # debug2
> # debug1
> # log
> # notice
> # warning
> # error
>
> #log_min_messages = notice # Values, in order of decreasing
> detail:
> # debug5
> # debug4
> # debug3
> # debug2
> # debug1
> # info
> # notice
> # warning
> # error
> # log
> # fatal
> # panic
>
> #log_error_verbosity = default # terse, default, or verbose
> messages
>
> #log_min_error_statement = panic # Values in order of increasing
> severity:
> # debug5
> # debug4
> # debug3
> # debug2
> # debug1
> # info
> # notice
> # warning
> # error
> # panic(off)
>
> #log_min_duration_statement = -1 # -1 is disabled, 0 logs all
> statements
> # and their durations, in milliseconds.
>
> #silent_mode = off # DO NOT USE without syslog or
> # redirect_stderr
>
> # - What to Log -
>
> #debug_print_parse = off
> #debug_print_rewritten = off
> #debug_print_plan = off
> #debug_pretty_print = off
> #log_connections = off
> #log_disconnections = off
> #log_duration = off
> log_line_prefix = '%t ' # Special values:
> # %u = user name
> # %d = database name
> # %r = remote host and port
> # %h = remote host
> # %p = PID
> # %t = timestamp (no milliseconds)
> # %m = timestamp with milliseconds
> # %i = command tag
> # %c = session id
> # %l = session line number
> # %s = session start timestamp
> # %x = transaction id
> # %q = stop here in non-session
> # processes
> # %% = '%'
> # e.g. '<%u%%%d> '
> #log_statement = 'none' # none, mod, ddl, all
> #log_hostname = off
>
>
> #-----------------------------------------------------------------------
> ----
> # RUNTIME STATISTICS
> #-----------------------------------------------------------------------
> ----
>
> # - Statistics Monitoring -
>
> #log_parser_stats = off
> #log_planner_stats = off
> #log_executor_stats = off
> #log_statement_stats = off
>
> # - Query/Index Statistics Collector -
>
> stats_start_collector = on
> #stats_command_string = off
> #stats_block_level = off
> stats_row_level = on
> #stats_reset_on_server_start = off
>
>
> #-----------------------------------------------------------------------
> ----
> # AUTOVACUUM PARAMETERS
> #-----------------------------------------------------------------------
> ----
>
> autovacuum = on # enable autovacuum subprocess?
> #autovacuum_naptime = 60 # time between autovacuum runs, in secs
> #autovacuum_vacuum_threshold = 1000 # min # of tuple updates before
> # vacuum
> #autovacuum_analyze_threshold = 500 # min # of tuple updates before
> # analyze
> #autovacuum_vacuum_scale_factor = 0.4 # fraction of rel size before
> # vacuum
> #autovacuum_analyze_scale_factor = 0.2 # fraction of rel size before
> # analyze
> #autovacuum_vacuum_cost_delay = -1 # default vacuum cost delay for
> # autovac, -1 means use
> # vacuum_cost_delay
> #autovacuum_vacuum_cost_limit = -1 # default vacuum cost limit for
> # autovac, -1 means use
> # vacuum_cost_limit
>
>
> #-----------------------------------------------------------------------
> ----
> # CLIENT CONNECTION DEFAULTS
> #-----------------------------------------------------------------------
> ----
>
> # - Statement Behavior -
>
> #search_path = '$user,public' # schema names
> #default_tablespace = '' # a tablespace name, '' uses
> # the default
> #check_function_bodies = on
> #default_transaction_isolation = 'read committed'
> #default_transaction_read_only = off
> #statement_timeout = 0 # 0 is disabled, in milliseconds
>
> # - Locale and Formatting -
>
> #datestyle = 'iso, mdy'
> #timezone = unknown # actually, defaults to TZ
> # environment setting
> #australian_timezones = off
> #extra_float_digits = 0 # min -15, max 2
> #client_encoding = sql_ascii # actually, defaults to database
> # encoding
>
> # These settings are initialized by initdb -- they might be changed
> lc_messages = 'C' # locale for system error message
> # strings
> lc_monetary = 'C' # locale for monetary formatting
> lc_numeric = 'C' # locale for number formatting
> lc_time = 'C' # locale for time formatting
>
> # - Other Defaults -
>
> #explain_pretty_print = on
> #dynamic_library_path = '$libdir'
>
>
> #-----------------------------------------------------------------------
> ----
> # LOCK MANAGEMENT
> #-----------------------------------------------------------------------
> ----
>
> #deadlock_timeout = 1000 # in milliseconds
> #max_locks_per_transaction = 64 # min 10
> # note: each lock table slot uses ~220 bytes of shared memory, and there
> are
> # max_locks_per_transaction * (max_connections +
> max_prepared_transactions)
> # lock table slots.
>
>
> #-----------------------------------------------------------------------
> ----
> # VERSION/PLATFORM COMPATIBILITY
> #-----------------------------------------------------------------------
> ----
>
> # - Previous Postgres Versions -
>
> #add_missing_from = off
> #backslash_quote = safe_encoding # on, off, or safe_encoding
> #default_with_oids = off
> #escape_string_warning = off
> #regex_flavor = advanced # advanced, extended, or basic
> #sql_inheritance = on
>
> # - Other Platforms & Clients -
>
> #transform_null_equals = off
>
>
> #-----------------------------------------------------------------------
> ----
> # CUSTOMIZED OPTIONS
> #-----------------------------------------------------------------------
> ----
>
> #custom_variable_classes = '' # list of custom variable class
> names
>
>
> 2007-01-05 14:37:02 LOG: database system was shut down at 2007-01-05
> 14:36:54 Eastern Standard Time
> 2007-01-05 14:37:02 LOG: checkpoint record is at 0/E1B0328
> 2007-01-05 14:37:02 LOG: redo record is at 0/E1B0328; undo record is at
> 0/0; shutdown TRUE
> 2007-01-05 14:37:02 LOG: next transaction ID: 780781; next OID: 17780
> 2007-01-05 14:37:02 LOG: next MultiXactId: 1; next MultiXactOffset: 0
> 2007-01-05 14:37:02 LOG: database system is ready
> 2007-01-05 14:37:02 LOG: transaction ID wrap limit is 2147484148,
> limited by database "postgres"
> 2007-01-05 14:37:02 LOG: pgpipe failed to bind: 10055i
> 2007-01-05 14:37:02 FATAL: could not create pipe for statistics buffer:
> No error
> 2007-01-05 14:37:02 LOG: autovacuum: processing database "template1"
> 2007-01-05 14:38:02 LOG: autovacuum: processing database "template1"
> 2007-01-05 14:38:02 LOG: pgpipe failed to bind: 10055i
> 2007-01-05 14:38:02 FATAL: could not create pipe for statistics buffer:
> No error
> 2007-01-05 14:38:25 LOG: received fast shutdown request
> 2007-01-05 14:38:25 LOG: shutting down
> 2007-01-05 14:38:25 LOG: database system is shut down
> 2007-01-05 14:38:26 LOG: logger shutting down
>
>
>
>
>
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I am not seeing this Error "Tcpip with an ID of 4226"

"The other limit is a maximum of 10 connections to the Server
component(which does file and print sharing; people were using Win2k Pro
as afile and print server). The only way to modify the limit is to
manuallymodify binary files."
I was suspicious that this limit was the one I was hitting BUT
a) I see no Error. Is there somewhere I can/could/should see this error?
b) I am not sure how this limit could or would affect my LOCAL ODBC
connection to PG
c) I seem to be able to get this number up to 13 (did not go any
further) without a problem when I was trying to cause the issue!

Oisin