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

Thanks for your answer.


Stoping/starting the server does not solve the problem.
It reappears quickly.

As a work around I still run my DB on Linux Red Hat with Postgres 8.1, but i
would like to move to the new Windows 2008 server.


How can I know when a fix will be released ?




-----Message d'origine-----
De=A0: Bruce Momjian [mailto:bruce@momjian.us]=20
Envoy=E9=A0: mardi 21 avril 2009 16:14
=C0=A0: grouvi
Cc=A0: pgsql-bugs@postgresql.org
Objet=A0: Re: [BUGS] BUG #4768: FATAL:could not reattach to shared memory:4=
87


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

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

grouvi wrote:
>=20
> The following bug has been logged online:
>=20
> 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:=20
>=20
> Symptoms:
> My DB update scripts crashes with the following error message
> FATAL:  could not reattach to shared memory (key=3D288, addr=3D02020000):=
 487
> The problem occurs with both autovacuum turned on or off.
>=20
>=20
> Configuration:
> -> PostgreSQL 8.3.7
> ->Windows 2008 64 bits.
> It is a normal install.=20
> I have no antivirus nor Firewall.
> There is the Windows Firewall but the problem still occurs while it is
> turned off.
>=20
>=20
>=20
> Thanks for help.
>=20
>=20
> Here is my full postgresql.conf
>=20
> # -----------------------------
> # PostgreSQL configuration file
> # -----------------------------
> #
> # This file consists of lines of the form:
> #
> #   name =3D value
> #
> # (The "=3D" is optional.)  Whitespace may be used.  Comments are introdu=
ced
> 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=3Don".  Some paramters can be changed at r=
un
> time
> # with the "SET" SQL command.
> #
> # Memory units:  kB =3D kilobytes MB =3D megabytes GB =3D gigabytes
> # Time units:    ms =3D milliseconds s =3D seconds min =3D minutes h =3D =
hours d =3D
> days
>=20
>=20
>
#---------------------------------------------------------------------------
> ---
> # FILE LOCATIONS
>
#---------------------------------------------------------------------------
> ---
>=20
> # The default values of these variables are driven from the -D
command-line
> # option or PGDATA environment variable, represented here as ConfigDir.
>=20
> #data_directory =3D 'ConfigDir'        # use data in another directory
>                     # (change requires restart)
> #hba_file =3D 'ConfigDir/pg_hba.conf'    # host-based authentication file
>                     # (change requires restart)
> #ident_file =3D 'ConfigDir/pg_ident.conf'    # ident configuration file
>                     # (change requires restart)
>=20
> # If external_pid_file is not explicitly set, no extra PID file is
written.
> #external_pid_file =3D '(none)'        # write an extra PID file
>                     # (change requires restart)
>=20
>=20
>
#---------------------------------------------------------------------------
> ---
> # CONNECTIONS AND AUTHENTICATION
>
#---------------------------------------------------------------------------
> ---
>=20
> # - Connection Settings -
>=20
> listen_addresses =3D '*'        # what IP address(es) to listen on;
>                     # comma-separated list of addresses;
>                     # defaults to 'localhost', '*' =3D all
>                     # (change requires restart)
> port =3D 5432                # (change requires restart)
> max_connections =3D 200    # 200 pour =C3=A9viter des "too many clients a=
lready"
> # Note:  Increasing max_connections costs ~400 bytes of shared memory per=
=20
> # 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 =3D 3    # (change requires restart)
> #unix_socket_directory =3D ''        # (change requires restart)
> #unix_socket_group =3D ''            # (change requires restart)
> #unix_socket_permissions =3D 0777        # begin with 0 to use octal
notation
>                     # (change requires restart)
> #bonjour_name =3D ''            # defaults to the computer name
>                     # (change requires restart)
>=20
> # - Security and Authentication -
>=20
> #authentication_timeout =3D 1min        # 1s-600s
> #ssl =3D off                # (change requires restart)
> #ssl_ciphers =3D 'ALL:!ADH:!LOW:!EXP:!MD5:@STRENGTH'    # allowed SSL
ciphers
>                     # (change requires restart)
> #password_encryption =3D on
> #db_user_namespace =3D off
>=20
> # Kerberos and GSSAPI
> #krb_server_keyfile =3D ''        # (change requires restart)
> #krb_srvname =3D 'postgres'        # (change requires restart, Kerberos
only)
> #krb_server_hostname =3D ''        # empty string matches any keytab entry
>                     # (change requires restart, Kerberos only)
> #krb_caseins_users =3D off        # (change requires restart)
> #krb_realm =3D ''                   # (change requires restart)
>=20
> # - TCP Keepalives -
> # see "man 7 tcp" for details
>=20
> #tcp_keepalives_idle =3D 0        # TCP_KEEPIDLE, in seconds;
>                     # 0 selects the system default
> #tcp_keepalives_interval =3D 0        # TCP_KEEPINTVL, in seconds;
>                     # 0 selects the system default
> #tcp_keepalives_count =3D 0        # TCP_KEEPCNT;
>                     # 0 selects the system default
>=20
>=20
>
#---------------------------------------------------------------------------
> ---
> # RESOURCE USAGE (except WAL)
>
#---------------------------------------------------------------------------
> ---
>=20
> # - Memory -
>=20
> shared_buffers =3D 32MB            # min 128kB or max_connections*16kB
>                     # (change requires restart)
> #temp_buffers =3D 8MB            # min 800kB
> max_prepared_transactions =3D 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 =3D 1MB                # min 64kB
> #maintenance_work_mem =3D 16MB        # min 1MB
> #max_stack_depth =3D 2MB            # min 100kB
>=20
> # - Free Space Map -
>=20
> max_fsm_pages =3D 204800            # min max_fsm_relations*16, 6 bytes e=
ach
>                     # (change requires restart)
> #max_fsm_relations =3D 1000        # min 100, ~70 bytes each
>                     # (change requires restart)
>=20
> # - Kernel Resource Usage -
>=20
> #max_files_per_process =3D 1000        # min 25
>                     # (change requires restart)
> shared_preload_libraries =3D '$libdir/plugins/plugin_debugger.dll'       =
 #
> (change requires restart)
>=20
> # - Cost-Based Vacuum Delay -
>=20
> #vacuum_cost_delay =3D 0            # 0-1000 milliseconds
> #vacuum_cost_page_hit =3D 1        # 0-10000 credits
> #vacuum_cost_page_miss =3D 10        # 0-10000 credits
> #vacuum_cost_page_dirty =3D 20        # 0-10000 credits
> #vacuum_cost_limit =3D 200        # 1-10000 credits
>=20
> # - Background Writer -
>=20
> #bgwriter_delay =3D 200ms            # 10-10000ms between rounds
> #bgwriter_lru_maxpages =3D 100        # 0-1000 max buffers written/round
> #bgwriter_lru_multiplier =3D 2.0        # 0-10.0 multipler on buffers
> scanned/round
>=20
>=20
>
#---------------------------------------------------------------------------
> ---
> # WRITE AHEAD LOG
>
#---------------------------------------------------------------------------
> ---
>=20
> # - Settings -
>=20
> #fsync =3D on                # turns forced synchronization on or off
> #synchronous_commit =3D on        # immediate fsync at commit
> #wal_sync_method =3D fsync        # the default is the first option=20
>                     # supported by the operating system:
>                     #   open_datasync
>                     #   fdatasync
>                     #   fsync
>                     #   fsync_writethrough
>                     #   open_sync
> #full_page_writes =3D on            # recover from partial page writes
> #wal_buffers =3D 64kB            # min 32kB
>                     # (change requires restart)
> #wal_writer_delay =3D 200ms        # 1-10000 milliseconds
>=20
> #commit_delay =3D 0            # range 0-100000, in microseconds
> #commit_siblings =3D 5            # range 1-1000
>=20
> # - Checkpoints -
>=20
> #checkpoint_segments =3D 3        # in logfile segments, min 1, 16MB each
> #checkpoint_timeout =3D 5min        # range 30s-1h
> #checkpoint_completion_target =3D 0.5    # checkpoint target duration, 0.=
0 -
> 1.0
> #checkpoint_warning =3D 30s        # 0 is off
>=20
> # - Archiving -
>=20
> #archive_mode =3D off        # allows archiving to be done
>                 # (change requires restart)
> #archive_command =3D ''        # command to use to archive a logfile segm=
ent
> #archive_timeout =3D 0        # force a logfile segment switch after this
>                 # time; 0 is off
>=20
>=20
>
#---------------------------------------------------------------------------
> ---
> # QUERY TUNING
>
#---------------------------------------------------------------------------
> ---
>=20
> # - Planner Method Configuration -
>=20
> #enable_bitmapscan =3D on
> #enable_hashagg =3D on
> #enable_hashjoin =3D on
> #enable_indexscan =3D on
> #enable_mergejoin =3D on
> #enable_nestloop =3D on
> #enable_seqscan =3D on
> #enable_sort =3D on
> #enable_tidscan =3D on
>=20
> # - Planner Cost Constants -
>=20
> #seq_page_cost =3D 1.0            # measured on an arbitrary scale
> #random_page_cost =3D 4.0            # same scale as above
> #cpu_tuple_cost =3D 0.01            # same scale as above
> #cpu_index_tuple_cost =3D 0.005        # same scale as above
> #cpu_operator_cost =3D 0.0025        # same scale as above
> #effective_cache_size =3D 128MB
>=20
> # - Genetic Query Optimizer -
>=20
> #geqo =3D on
> #geqo_threshold =3D 12
> #geqo_effort =3D 5            # range 1-10
> #geqo_pool_size =3D 0            # selects default based on effort
> #geqo_generations =3D 0            # selects default based on effort
> #geqo_selection_bias =3D 2.0        # range 1.5-2.0
>=20
> # - Other Planner Options -
>=20
> #default_statistics_target =3D 10        # range 1-1000
> #constraint_exclusion =3D off
> #from_collapse_limit =3D 8
> #join_collapse_limit =3D 8        # 1 disables collapsing of explicit=20
>                     # JOIN clauses
>=20
>=20
>
#---------------------------------------------------------------------------
> ---
> # ERROR REPORTING AND LOGGING
>
#---------------------------------------------------------------------------
> ---
>=20
> # - Where to Log -
>=20
> log_destination =3D 'stderr'        # Valid values are combinations of
>                     # stderr, csvlog, syslog and eventlog,
>                     # depending on platform.  csvlog
>                     # requires logging_collector to be on.
>=20
> # This is used when logging to stderr:
> logging_collector =3D on        # Enable capturing of stderr and csvlog
>                     # into log files. Required to be on for
>                     # csvlogs.
>                     # (change requires restart)
>=20
> # These are only used if logging_collector is on:
> #log_directory =3D 'pg_log'        # directory where log files are writte=
n,
>                     # can be absolute or relative to PGDATA
> #log_filename =3D 'postgresql-%Y-%m-%d_%H%M%S.log'    # log file name
> pattern,
>                     # can include strftime() escapes
> #log_truncate_on_rotation =3D 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 =3D 1d            # Automatic rotation of logfiles will
>                     # happen after that time.  0 to disable.
> #log_rotation_size =3D 10MB        # Automatic rotation of logfiles will=
=20
>                     # happen after that much log output.
>                     # 0 to disable.
>=20
> # These are relevant when logging to syslog:
> #syslog_facility =3D 'LOCAL0'
> #syslog_ident =3D 'postgres'
>=20
>=20
> # - When to Log -
>=20
> #client_min_messages =3D notice        # values in order of decreasing
> detail:
>                     #   debug5
>                     #   debug4
>                     #   debug3
>                     #   debug2
>                     #   debug1
>                     #   log
>                     #   notice
>                     #   warning
>                     #   error
>=20
> #log_min_messages =3D notice        # values in order of decreasing detai=
l:
>                     #   debug5
>                     #   debug4
>                     #   debug3
>                     #   debug2
>                     #   debug1
>                     #   info
>                     #   notice
>                     #   warning
>                     #   error
>                     #   log
>                     #   fatal
>                     #   panic
>=20
> #log_error_verbosity =3D default        # terse, default, or verbose
messages
>=20
> #log_min_error_statement =3D error    # values in order of decreasing
detail:
>                      #   debug5
>                     #   debug4
>                     #   debug3
>                     #   debug2
>                     #   debug1
>                      #   info
>                     #   notice
>                     #   warning
>                     #   error
>                     #   log
>                     #   fatal
>                     #   panic (effectively off)
>=20
> #log_min_duration_statement =3D -1    # -1 is disabled, 0 logs all
statements
>                     # and their durations, > 0 logs only
>                     # statements running at least this time.
>=20
> #silent_mode =3D off            # DO NOT USE without syslog or
>                     # logging_collector
>                     # (change requires restart)
>=20
> # - What to Log -
>=20
> #debug_print_parse =3D off
> #debug_print_rewritten =3D off
> #debug_print_plan =3D off
> #debug_pretty_print =3D off
> #log_checkpoints =3D off
> #log_connections =3D off
> #log_disconnections =3D off
> #log_duration =3D off
> #log_hostname =3D off
> log_line_prefix =3D '%t Tx[%x] cmd[%i] PID[%p] DB[%d] '
>                     # special values:
>                     #   %u =3D user name
>                     #   %d =3D database name
>                     #   %r =3D remote host and port
>                     #   %h =3D remote host
>                     #   %p =3D process ID
>                     #   %t =3D timestamp without milliseconds
>                     #   %m =3D timestamp with milliseconds
>                     #   %i =3D command tag
>                     #   %c =3D session ID
>                     #   %l =3D session line number
>                     #   %s =3D session start timestamp
>                     #   %v =3D virtual transaction ID
>                     #   %x =3D transaction ID (0 if none)
>                     #   %q =3D stop here in non-session
>                     #        processes
>                     #   %% =3D '%'
>                     # e.g. '<%u%%%d> '
> #log_lock_waits =3D off            # log lock waits >=3D deadlock_timeout
> #log_statement =3D 'none'            # none, ddl, mod, all
> #log_temp_files =3D -1            # log temporary files equal or larger
>                     # than specified size;
>                     # -1 disables, 0 logs all temp files
> #log_timezone =3D unknown            # actually, defaults to TZ environme=
nt
>                     # setting
>=20
>=20
>
#---------------------------------------------------------------------------
> ---
> # RUNTIME STATISTICS
>
#---------------------------------------------------------------------------
> ---
>=20
> # - Query/Index Statistics Collector -
>=20
> track_activities =3D on
> track_counts =3D on
> update_process_title =3D on
>=20
>=20
> # - Statistics Monitoring -
>=20
> #log_parser_stats =3D off
> #log_planner_stats =3D off
> #log_executor_stats =3D off
> #log_statement_stats =3D off
>=20
>=20
>
#---------------------------------------------------------------------------
> ---
> # AUTOVACUUM PARAMETERS
>
#---------------------------------------------------------------------------
> ---
>=20
> autovacuum =3D off            # Enable autovacuum subprocess?  'on'=20
>                     # requires track_counts to also be on.
> #log_autovacuum_min_duration =3D -1    # -1 disables, 0 logs all actions =
and
>                     # their durations, > 0 logs only
>                     # actions running at least that time.
> #autovacuum_max_workers =3D 3        # max number of autovacuum subproces=
ses
> #autovacuum_naptime =3D 1min        # time between autovacuum runs
> autovacuum_vacuum_threshold =3D 50    # min number of row updates before
>                     # vacuum
> autovacuum_analyze_threshold =3D 50    # min number of row updates before=
=20
>                     # analyze
> autovacuum_vacuum_scale_factor =3D 0.2    # fraction of table size before
> vacuum
> autovacuum_analyze_scale_factor =3D 0.1    # fraction of table size before
> analyze
> autovacuum_freeze_max_age =3D 200000000    # maximum XID age before forced
> vacuum
>                     # (change requires restart)
> autovacuum_vacuum_cost_delay =3D 20    # default vacuum cost delay for
>                     # autovacuum, -1 means use
>                     # vacuum_cost_delay
> autovacuum_vacuum_cost_limit =3D -1    # default vacuum cost limit for
>                     # autovacuum, -1 means use
>                     # vacuum_cost_limit
>=20
>=20
>
#---------------------------------------------------------------------------
> ---
> # CLIENT CONNECTION DEFAULTS
>
#---------------------------------------------------------------------------
> ---
>=20
> # - Statement Behavior -
>=20
> #search_path =3D '"$user",public'        # schema names
> #default_tablespace =3D ''        # a tablespace name, '' uses the default
> #temp_tablespaces =3D ''            # a list of tablespace names, '' uses
>                     # only default tablespace
> #check_function_bodies =3D on
> #default_transaction_isolation =3D 'read committed'
> #default_transaction_read_only =3D off
> #session_replication_role =3D 'origin'
> #statement_timeout =3D 0            # 0 is disabled
> #vacuum_freeze_min_age =3D 100000000
> #xmlbinary =3D 'base64'
> #xmloption =3D 'content'
>=20
> # - Locale and Formatting -
>=20
> datestyle =3D 'iso, mdy'
> #timezone =3D unknown            # actually, defaults to TZ environment
>                     # setting
> #timezone_abbreviations =3D 'Default'     # Select the set of available t=
ime
> zone
>                     # abbreviations.  Currently, there are
>                     #   Default
>                     #   Australia
>                     #   India
>                     # You can create your own file in
>                     # share/timezonesets/.
> #extra_float_digits =3D 0            # min -15, max 2
> #client_encoding =3D sql_ascii        # actually, defaults to database
>                     # encoding
>=20
> # These settings are initialized by initdb, but they can be changed.
> lc_messages =3D 'C'            # locale for system error message
>                     # strings
> lc_monetary =3D 'C'            # locale for monetary formatting
> lc_numeric =3D 'C'            # locale for number formatting
> lc_time =3D 'C'                # locale for time formatting
>=20
> # default configuration for text search
> default_text_search_config =3D 'pg_catalog.english'
>=20
> # - Other Defaults -
>=20
> #explain_pretty_print =3D on
> #dynamic_library_path =3D '$libdir'
> #local_preload_libraries =3D ''
>=20
>=20
>
#---------------------------------------------------------------------------
> ---
> # LOCK MANAGEMENT
>
#---------------------------------------------------------------------------
> ---
>=20
> #deadlock_timeout =3D 1s
> #max_locks_per_transaction =3D 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.
>=20
>=20
>
#---------------------------------------------------------------------------
> ---
> # VERSION/PLATFORM COMPATIBILITY
>
#---------------------------------------------------------------------------
> ---
>=20
> # - Previous PostgreSQL Versions -
>=20
> #add_missing_from =3D off
> #array_nulls =3D on
> #backslash_quote =3D safe_encoding    # on, off, or safe_encoding
> #default_with_oids =3D off
> #escape_string_warning =3D on
> #regex_flavor =3D advanced        # advanced, extended, or basic
> #sql_inheritance =3D on
> #standard_conforming_strings =3D off
> #synchronize_seqscans =3D on
>=20
> # - Other Platforms and Clients -
>=20
> #transform_null_equals =3D off
>=20
>=20
>
#---------------------------------------------------------------------------
> ---
> # CUSTOMIZED OPTIONS
>
#---------------------------------------------------------------------------
> ---
>=20
> #custom_variable_classes =3D ''        # list of custom variable class na=
mes
>=20
> --=20
> Sent via pgsql-bugs mailing list (pgsql-bugs@postgresql.org)
> To make changes to your subscription:
> http://www.postgresql.org/mailpref/pgsql-bugs

--=20
  Bruce Momjian  <bruce@momjian.us>        http://momjian.us
  EnterpriseDB                             http://enterprisedb.com

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