Re: Database Failure on Windows XP Pro psql (PostgreSQL) 8.1.4

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@postgresql.org
[mailto:pgsql-general-owner@postgresql.org] On Behalf Of Shelby Cain
Sent: Monday, January 08, 2007 3:12 PM
To: Oisin Glynn; pgsql-general@postgresql.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@oisinglynn.com>
To: pgsql-general@postgresql.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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