Re: BUG #4768: FATAL:could not reattach to shared memory:487

This is a known problem. I think stoping/starting the server will fix
it.  We hope to find the cause soon.

---------------------------------------------------------------------------

grouvi wrote:
>
> The following bug has been logged online:
>
> Bug reference:      4768
> Logged by:          grouvi
> Email address:      ghr@sylob.com
> PostgreSQL version: 8.3.7
> Operating system:   Windows 2008 x64
> Description:        FATAL:could not reattach to shared memory:487
> Details:
>
> Symptoms:
> My DB update scripts crashes with the following error message
> FATAL:  could not reattach to shared memory (key=288, addr=02020000): 487
> The problem occurs with both autovacuum turned on or off.
>
>
> Configuration:
> -> PostgreSQL 8.3.7
> ->Windows 2008 64 bits.
> It is a normal install.
> I have no antivirus nor Firewall.
> There is the Windows Firewall but the problem still occurs while it is
> turned off.
>
>
>
> Thanks for help.
>
>
> Here is my full postgresql.conf
>
> # -----------------------------
> # PostgreSQL configuration file
> # -----------------------------
> #
> # This file consists of lines of the form:
> #
> #   name = value
> #
> # (The "=" is optional.)  Whitespace may be used.  Comments are introduced
> with
> # "#" anywhere on a line.  The complete list of parameter names and allowed
> # values can be found in the PostgreSQL documentation.
> #
> # The commented-out settings shown in this file represent the default
> values.
> # Re-commenting a setting is NOT sufficient to revert it to the default
> value;
> # you need to reload the server.
> #
> # This file is read on server startup and when the server receives a SIGHUP
> # signal.  If you edit the file on a running system, you have to SIGHUP the
> # server for the changes to take effect, or use "pg_ctl reload".  Some
> # parameters, which are marked below, require a server shutdown and restart
> to
> # take effect.
> #
> # Any parameter can also be given as a command-line option to the server,
> e.g.,
> # "postgres -c log_connections=on".  Some paramters can be changed at run
> time
> # with the "SET" SQL command.
> #
> # Memory units:  kB = kilobytes MB = megabytes GB = gigabytes
> # Time units:    ms = milliseconds s = seconds min = minutes h = hours d =
> days
>
>
> #---------------------------------------------------------------------------
> ---
> # FILE LOCATIONS
> #---------------------------------------------------------------------------
> ---
>
> # The default values of these variables are driven from the -D command-line
> # option or PGDATA environment variable, represented here as ConfigDir.
>
> #data_directory = 'ConfigDir'        # use data in another directory
>                     # (change requires restart)
> #hba_file = 'ConfigDir/pg_hba.conf'    # host-based authentication file
>                     # (change requires restart)
> #ident_file = 'ConfigDir/pg_ident.conf'    # ident configuration file
>                     # (change requires restart)
>
> # If external_pid_file is not explicitly set, no extra PID file is written.
> #external_pid_file = '(none)'        # write an extra PID file
>                     # (change requires restart)
>
>
> #---------------------------------------------------------------------------
> ---
> # CONNECTIONS AND AUTHENTICATION
> #---------------------------------------------------------------------------
> ---
>
> # - Connection Settings -
>
> listen_addresses = '*'        # what IP address(es) to listen on;
>                     # comma-separated list of addresses;
>                     # defaults to 'localhost', '*' = all
>                     # (change requires restart)
> port = 5432                # (change requires restart)
> max_connections = 200    # 200 pour éviter des "too many clients already"
> # 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 = 3    # (change requires restart)
> #unix_socket_directory = ''        # (change requires restart)
> #unix_socket_group = ''            # (change requires restart)
> #unix_socket_permissions = 0777        # begin with 0 to use octal notation
>                     # (change requires restart)
> #bonjour_name = ''            # defaults to the computer name
>                     # (change requires restart)
>
> # - Security and Authentication -
>
> #authentication_timeout = 1min        # 1s-600s
> #ssl = off                # (change requires restart)
> #ssl_ciphers = 'ALL:!ADH:!LOW:!EXP:!MD5:@STRENGTH'    # allowed SSL ciphers
>                     # (change requires restart)
> #password_encryption = on
> #db_user_namespace = off
>
> # Kerberos and GSSAPI
> #krb_server_keyfile = ''        # (change requires restart)
> #krb_srvname = 'postgres'        # (change requires restart, Kerberos only)
> #krb_server_hostname = ''        # empty string matches any keytab entry
>                     # (change requires restart, Kerberos only)
> #krb_caseins_users = off        # (change requires restart)
> #krb_realm = ''                   # (change requires restart)
>
> # - 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 = 32MB            # min 128kB or max_connections*16kB
>                     # (change requires restart)
> #temp_buffers = 8MB            # min 800kB
> max_prepared_transactions = 200         # can be 0 or more
>                     # (change requires restart)
> # Note:  Increasing max_prepared_transactions costs ~600 bytes of shared
> memory
> # per transaction slot, plus lock space (see max_locks_per_transaction).
> #work_mem = 1MB                # min 64kB
> #maintenance_work_mem = 16MB        # min 1MB
> #max_stack_depth = 2MB            # min 100kB
>
> # - Free Space Map -
>
> max_fsm_pages = 204800            # min max_fsm_relations*16, 6 bytes each
>                     # (change requires restart)
> #max_fsm_relations = 1000        # min 100, ~70 bytes each
>                     # (change requires restart)
>
> # - Kernel Resource Usage -
>
> #max_files_per_process = 1000        # min 25
>                     # (change requires restart)
> shared_preload_libraries = '$libdir/plugins/plugin_debugger.dll'        #
> (change requires restart)
>
> # - 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        # 1-10000 credits
>
> # - Background Writer -
>
> #bgwriter_delay = 200ms            # 10-10000ms between rounds
> #bgwriter_lru_maxpages = 100        # 0-1000 max buffers written/round
> #bgwriter_lru_multiplier = 2.0        # 0-10.0 multipler on buffers
> scanned/round
>
>
> #---------------------------------------------------------------------------
> ---
> # WRITE AHEAD LOG
> #---------------------------------------------------------------------------
> ---
>
> # - Settings -
>
> #fsync = on                # turns forced synchronization on or off
> #synchronous_commit = on        # immediate fsync at commit
> #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 = 64kB            # min 32kB
>                     # (change requires restart)
> #wal_writer_delay = 200ms        # 1-10000 milliseconds
>
> #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 = 5min        # range 30s-1h
> #checkpoint_completion_target = 0.5    # checkpoint target duration, 0.0 -
> 1.0
> #checkpoint_warning = 30s        # 0 is off
>
> # - Archiving -
>
> #archive_mode = off        # allows archiving to be done
>                 # (change requires restart)
> #archive_command = ''        # command to use to archive a logfile segment
> #archive_timeout = 0        # force a logfile segment switch after this
>                 # time; 0 is off
>
>
> #---------------------------------------------------------------------------
> ---
> # 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 -
>
> #seq_page_cost = 1.0            # measured on an arbitrary scale
> #random_page_cost = 4.0            # same scale as above
> #cpu_tuple_cost = 0.01            # same scale as above
> #cpu_index_tuple_cost = 0.005        # same scale as above
> #cpu_operator_cost = 0.0025        # same scale as above
> #effective_cache_size = 128MB
>
> # - 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
>                     # JOIN clauses
>
>
> #---------------------------------------------------------------------------
> ---
> # ERROR REPORTING AND LOGGING
> #---------------------------------------------------------------------------
> ---
>
> # - Where to Log -
>
> log_destination = 'stderr'        # Valid values are combinations of
>                     # stderr, csvlog, syslog and eventlog,
>                     # depending on platform.  csvlog
>                     # requires logging_collector to be on.
>
> # This is used when logging to stderr:
> logging_collector = on        # Enable capturing of stderr and csvlog
>                     # into log files. Required to be on for
>                     # csvlogs.
>                     # (change requires restart)
>
> # These are only used if logging_collector 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 = on        # If on, an 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 = 1d            # Automatic rotation of logfiles will
>                     # happen after that time.  0 to disable.
> #log_rotation_size = 10MB        # Automatic rotation of logfiles will
>                     # happen after that much 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 = error    # values in order of decreasing detail:
>                      #   debug5
>                     #   debug4
>                     #   debug3
>                     #   debug2
>                     #   debug1
>                      #   info
>                     #   notice
>                     #   warning
>                     #   error
>                     #   log
>                     #   fatal
>                     #   panic (effectively off)
>
> #log_min_duration_statement = -1    # -1 is disabled, 0 logs all statements
>                     # and their durations, > 0 logs only
>                     # statements running at least this time.
>
> #silent_mode = off            # DO NOT USE without syslog or
>                     # logging_collector
>                     # (change requires restart)
>
> # - What to Log -
>
> #debug_print_parse = off
> #debug_print_rewritten = off
> #debug_print_plan = off
> #debug_pretty_print = off
> #log_checkpoints = off
> #log_connections = off
> #log_disconnections = off
> #log_duration = off
> #log_hostname = off
> log_line_prefix = '%t Tx[%x] cmd[%i] PID[%p] DB[%d] '
>                     # special values:
>                     #   %u = user name
>                     #   %d = database name
>                     #   %r = remote host and port
>                     #   %h = remote host
>                     #   %p = process ID
>                     #   %t = timestamp without milliseconds
>                     #   %m = timestamp with milliseconds
>                     #   %i = command tag
>                     #   %c = session ID
>                     #   %l = session line number
>                     #   %s = session start timestamp
>                     #   %v = virtual transaction ID
>                     #   %x = transaction ID (0 if none)
>                     #   %q = stop here in non-session
>                     #        processes
>                     #   %% = '%'
>                     # e.g. '<%u%%%d> '
> #log_lock_waits = off            # log lock waits >= deadlock_timeout
> #log_statement = 'none'            # none, ddl, mod, all
> #log_temp_files = -1            # log temporary files equal or larger
>                     # than specified size;
>                     # -1 disables, 0 logs all temp files
> #log_timezone = unknown            # actually, defaults to TZ environment
>                     # setting
>
>
> #---------------------------------------------------------------------------
> ---
> # RUNTIME STATISTICS
> #---------------------------------------------------------------------------
> ---
>
> # - Query/Index Statistics Collector -
>
> track_activities = on
> track_counts = on
> update_process_title = on
>
>
> # - Statistics Monitoring -
>
> #log_parser_stats = off
> #log_planner_stats = off
> #log_executor_stats = off
> #log_statement_stats = off
>
>
> #---------------------------------------------------------------------------
> ---
> # AUTOVACUUM PARAMETERS
> #---------------------------------------------------------------------------
> ---
>
> autovacuum = off            # Enable autovacuum subprocess?  'on'
>                     # requires track_counts to also be on.
> #log_autovacuum_min_duration = -1    # -1 disables, 0 logs all actions and
>                     # their durations, > 0 logs only
>                     # actions running at least that time.
> #autovacuum_max_workers = 3        # max number of autovacuum subprocesses
> #autovacuum_naptime = 1min        # time between autovacuum runs
> autovacuum_vacuum_threshold = 50    # min number of row updates before
>                     # vacuum
> autovacuum_analyze_threshold = 50    # min number of row updates before
>                     # analyze
> autovacuum_vacuum_scale_factor = 0.2    # fraction of table size before
> vacuum
> autovacuum_analyze_scale_factor = 0.1    # fraction of table size before
> analyze
> autovacuum_freeze_max_age = 200000000    # maximum XID age before forced
> vacuum
>                     # (change requires restart)
> autovacuum_vacuum_cost_delay = 20    # default vacuum cost delay for
>                     # autovacuum, -1 means use
>                     # vacuum_cost_delay
> autovacuum_vacuum_cost_limit = -1    # default vacuum cost limit for
>                     # autovacuum, -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
> #temp_tablespaces = ''            # a list of tablespace names, '' uses
>                     # only default tablespace
> #check_function_bodies = on
> #default_transaction_isolation = 'read committed'
> #default_transaction_read_only = off
> #session_replication_role = 'origin'
> #statement_timeout = 0            # 0 is disabled
> #vacuum_freeze_min_age = 100000000
> #xmlbinary = 'base64'
> #xmloption = 'content'
>
> # - Locale and Formatting -
>
> datestyle = 'iso, mdy'
> #timezone = unknown            # actually, defaults to TZ environment
>                     # setting
> #timezone_abbreviations = 'Default'     # Select the set of available time
> zone
>                     # abbreviations.  Currently, there are
>                     #   Default
>                     #   Australia
>                     #   India
>                     # You can create your own file in
>                     # share/timezonesets/.
> #extra_float_digits = 0            # min -15, max 2
> #client_encoding = sql_ascii        # actually, defaults to database
>                     # encoding
>
> # These settings are initialized by initdb, but they can 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
>
> # default configuration for text search
> default_text_search_config = 'pg_catalog.english'
>
> # - Other Defaults -
>
> #explain_pretty_print = on
> #dynamic_library_path = '$libdir'
> #local_preload_libraries = ''
>
>
> #---------------------------------------------------------------------------
> ---
> # LOCK MANAGEMENT
> #---------------------------------------------------------------------------
> ---
>
> #deadlock_timeout = 1s
> #max_locks_per_transaction = 64        # min 10
>                     # (change requires restart)
> # Note:  Each lock table slot uses ~270 bytes of shared memory, and there
> are
> # max_locks_per_transaction * (max_connections + max_prepared_transactions)
> # lock table slots.
>
>
> #---------------------------------------------------------------------------
> ---
> # VERSION/PLATFORM COMPATIBILITY
> #---------------------------------------------------------------------------
> ---
>
> # - Previous PostgreSQL Versions -
>
> #add_missing_from = off
> #array_nulls = on
> #backslash_quote = safe_encoding    # on, off, or safe_encoding
> #default_with_oids = off
> #escape_string_warning = on
> #regex_flavor = advanced        # advanced, extended, or basic
> #sql_inheritance = on
> #standard_conforming_strings = off
> #synchronize_seqscans = on
>
> # - Other Platforms and Clients -
>
> #transform_null_equals = off
>
>
> #---------------------------------------------------------------------------
> ---
> # CUSTOMIZED OPTIONS
> #---------------------------------------------------------------------------
> ---
>
> #custom_variable_classes = ''        # list of custom variable class names
>
> --
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> To make changes to your subscription:
> http://www.postgresql.org/mailpref/pgsql-bugs

--
  Bruce Momjian  <bruce@momjian.us>        http://momjian.us
  EnterpriseDB                             http://enterprisedb.com

  + If your life is a hard drive, Christ can be your backup. +