Auto Vacuum out of memory

From: Rose Zhou
Subject: Auto Vacuum out of memory
Date: ,
Msg-id: 9046F2E209CC4CF794B277783B27CA17@Cicero
(view: Whole thread, Raw)
Responses: Re: Auto Vacuum out of memory  (Robert Haas)
List: pgsql-performance

Good day!

We bought a new WinXP x64 Professional, it has 12GB memory.

I installed postgresql-8.4.1-1-windows version on this PC, also installed
another .Net application which reads in data from a TCP port and
insert/update the database, the data volume is large, with heavy writing and
updating on a partitioned table.

I configured the PostgreSQL as below:

Shared_buffers=1024MB
effective_cache_size=5120MB
work_mem=32MB
maintenance_work_men=200MB

But I got the Auto Vacuum out-of-memory error. The detailed configuration is
as follows, can anyone suggest what is the best configuration from the
performance perspective?


# -----------------------------
# 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 parameters can be changed at
run time # with the "SET" SQL command.
#
# Memory units:  kB = kilobytes        Time units:  ms  = milliseconds
#                MB = megabytes                     s   = seconds
#                GB = gigabytes                     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 = 100            # (change requires restart)
# Note:  Increasing max_connections costs ~400 bytes of shared memory per #
connection slot, plus lock space (see max_locks_per_transaction).
#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 = ''
#krb_srvname = 'postgres'        # (Kerberos only)
#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 = 1024MB            # min 128kB
                    # (change requires restart)
#temp_buffers = 8MB            # min 800kB
#max_prepared_transactions = 0        # zero disables the feature
                    # (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).
# It is not advisable to set max_prepared_transactions nonzero unless you #
actively intend to use prepared transactions.

work_mem = 32MB                # min 64kB
maintenance_work_mem=200MB
#max_stack_depth = 2MB            # min 100kB

# - Kernel Resource Usage -

#max_files_per_process = 1000        # min 25
                    # (change requires restart)
#shared_preload_libraries = ''        # (change requires restart)

# - Cost-Based Vacuum Delay -

#vacuum_cost_delay = 0ms        # 0-100 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

# - Asynchronous Behavior -

#effective_io_concurrency = 1        # 1-1000. 0 disables prefetching


#---------------------------------------------------------------------------
---
# 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 = 256            # 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 =30
#checkpoint_timeout = 5min        # range 30s-1h
#checkpoint_completion_target = 0.5    # checkpoint target duration, 0.0 -
1.0
#checkpoint_warning = 30s        # 0 disables

# - 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
                # number of seconds; 0 disables


#---------------------------------------------------------------------------
---
# 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 =5120MB

# - 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 = 100    # range 1-10000
#constraint_exclusion = partition    # on, off, or partition
#cursor_tuple_fraction = 0.1        # range 0.0-1.0
#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_%H.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 = 60            # Automatic rotation of logfiles
will
                    # happen after that time.  0
disables.
log_rotation_size = 100000        # Automatic rotation of logfiles
will
                    # happen after that much log output.
                    # 0 disables.

# These are relevant when logging to syslog:
#syslog_facility = 'LOCAL0'
#syslog_ident = 'postgres'

#silent_mode = off            # Run server silently.
                    # DO NOT USE without syslog or
                    # logging_collector
                    # (change requires restart)


# - When to Log -

client_min_messages = error        # values in order of decreasing
detail:
                    #   debug5
                    #   debug4
                    #   debug3
                    #   debug2
                    #   debug1
                    #   log
                    #   notice
                    #   warning
                    #   error

log_min_messages = error        # 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
number
                    # of milliseconds


# - What to Log -

#debug_print_parse = off
#debug_print_rewritten = off
#debug_print_plan = off
#debug_pretty_print = on
#log_checkpoints = off
#log_connections = off
#log_disconnections = off
#log_duration = off
#log_hostname = off
log_line_prefix = '%t'            # 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 the specified size in
kilobytes;
                    # -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
#track_functions = none            # none, pl, all
#track_activity_query_size = 1024
#update_process_title = on
#stats_temp_directory = 'pg_stat_tmp'


# - Statistics Monitoring -

#log_parser_stats = off
#log_planner_stats = off
#log_executor_stats = off
#log_statement_stats = off


#---------------------------------------------------------------------------
---
# AUTOVACUUM PARAMETERS
#---------------------------------------------------------------------------
---


autovacuum = true            # 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 this
number
                    # of milliseconds.
#autovacuum_max_workers = 3        # max number of autovacuum
subprocesses
#autovacuum_naptime = 1min        # time between autovacuum runs
# NOTE: This parameter is been added by EnterpriseDB's Tuning Wiard on
2010/01/27 16:09:50
#autovacuum_naptime = 60        # time between autovacuum runs

autovacuum_vacuum_threshold = 1000    # min number of row updates before
                    # vacuum
autovacuum_analyze_threshold = 250    # 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 = 20ms    # default vacuum cost delay for
                    # autovacuum, in milliseconds;
                    # -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            # in milliseconds, 0 is disabled
#vacuum_freeze_min_age = 50000000
#vacuum_freeze_table_age = 150000000
#xmlbinary = 'base64'
#xmloption = 'content'

# - Locale and Formatting -

datestyle = 'iso, dmy'
#intervalstyle = 'postgres'
#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 = 'English_United Kingdom.1252'            # locale for
system error message
                    # strings
lc_monetary = 'English_United Kingdom.1252'            # locale for
monetary formatting
lc_numeric = 'English_United Kingdom.1252'            # locale for
number formatting
lc_time = 'English_United Kingdom.1252'                # locale for
time formatting

# default configuration for text search
default_text_search_config = 'pg_catalog.english'

# - Other Defaults -

#dynamic_library_path = '$libdir'
#local_preload_libraries = ''


#---------------------------------------------------------------------------
---
# LOCK MANAGEMENT
#---------------------------------------------------------------------------
---

#deadlock_timeout = 1s
max_locks_per_transaction = 150        # 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



Best Regards

Rose Zhou



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