Thanks kevin for your answer. Here is some additionnal informations
attached as files.
regards.
Lionel
Kevin Grittner a écrit :
lionel duboeuf <lionel.duboeuf@xxxxxxxxxxx> wrote:
Some informations:
The following problem has been detected on
Postgresql 8.3 and 8.4. on System linux or windows
Default AutoVacuum daemon working
One pg_dump every day
This happens sometimes and i don't see what can be the cause.
A manual Vacuum Analyse repair that problem.
It's good to know that the issue has been observed in more than one
release or on more than one platform, but it's also useful to get a
bit more information about one particular occurrence. Please read
this:
http://wiki.postgresql.org/wiki/SlowQueryQuestions
In particular, knowing such things as your postgresql.conf settings,
the disk configuration, how much RAM the machine has, etc. can allow
us to provide more useful advice.
Please run these as EXPLAIN ANALYZE (or at least whatever you can
get to finish that way) instead of just EXPLAIN. If you can let the
slow one run through EXPLAIN ANALYZE overnight or on a test machine
so that it can complete, it will give us a lot more with which to
work. Please attach wide output (like that from EXPLAIN) as a text
attachment, to prevent wrapping which makes it hard to read.
-Kevin
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Core(TM)2 Duo CPU T7500 @ 2.20GHz
stepping : 11
cpu MHz : 2201.000
cache size : 4096 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 2
apicid : 0
initial apicid : 0
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc arch_perfmon pebs bts pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm lahf_lm ida tpr_shadow vnmi flexpriority
bogomips : 4389.59
clflush size : 64
power management:
processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Core(TM)2 Duo CPU T7500 @ 2.20GHz
stepping : 11
cpu MHz : 2201.000
cache size : 4096 KB
physical id : 0
siblings : 2
core id : 1
cpu cores : 2
apicid : 1
initial apicid : 1
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc arch_perfmon pebs bts pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm lahf_lm ida tpr_shadow vnmi flexpriority
bogomips : 4388.96
clflush size : 64
power management:
QUERY PLAN
Nested Loop (cost=58.71..1512.50 rows=1 width=16) (actual time=1.849..535681.136 rows=14 loops=1)
-> Nested Loop (cost=58.71..1506.60 rows=1 width=20) (actual time=1.839..535680.377 rows=14 loops=1)
Join Filter: (link0_.element_source = blocks9_.element_seqnum)
-> Nested Loop (cost=58.71..1498.29 rows=1 width=32) (actual time=1.819..535337.910 rows=6534 loops=1)
-> Nested Loop (cost=58.71..1497.14 rows=1 width=28) (actual time=1.811..535246.825 rows=6534 loops=1)
-> Nested Loop (cost=58.71..1488.83 rows=1 width=36) (actual time=1.800..535160.718 rows=6534 loops=1)
-> Nested Loop (cost=58.71..1484.40 rows=1 width=28) (actual time=1.772..535042.549 rows=6534 loops=1)
-> Nested Loop (cost=13.20..1434.87 rows=1 width=16) (actual time=1.398..8327.567 rows=122850 loops=1)
-> Nested Loop (cost=13.20..1428.97 rows=1 width=20) (actual time=1.387..1911.520 rows=122850 loops=1)
-> Nested Loop (cost=13.20..1427.83 rows=1 width=24) (actual time=1.374..517.662 rows=122850 loops=1)
-> Nested Loop (cost=0.00..16.63 rows=1 width=16) (actual time=0.085..0.409 rows=15 loops=1)
-> Index Scan using fki_element_block_block on element_block blocks7_ (cost=0.00..8.30 rows=1 width=8) (actual time=0.045..0.082 rows=15 loops=1)
Index Cond: (block_seqnum = 5)
-> Index Scan using pk_user_element on user_element users3_ (cost=0.00..8.33 rows=1 width=8) (actual time=0.012..0.015 rows=1 loops=15)
Index Cond: ((users3_.user_seqnum = 10) AND (users3_.element_seqnum = blocks7_.element_seqnum))
-> Bitmap Heap Scan on user_element users5_ (cost=13.20..1404.85 rows=634 width=8) (actual time=1.091..12.478 rows=8190 loops=15)
Recheck Cond: (users5_.user_seqnum = 10)
-> Bitmap Index Scan on fki_user_element_user (cost=0.00..13.05 rows=634 width=0) (actual time=1.062..1.062 rows=8194 loops=15)
Index Cond: (users5_.user_seqnum = 10)
-> Seq Scan on block block8_ (cost=0.00..1.14 rows=1 width=4) (actual time=0.004..0.005 rows=1 loops=122850)
Filter: (block8_.block_seqnum = 5)
-> Seq Scan on "user" user4_ (cost=0.00..5.89 rows=1 width=4) (actual time=0.005..0.047 rows=1 loops=122850)
Filter: (user4_.user_seqnum = 10)
-> Bitmap Heap Scan on link link0_ (cost=45.50..49.51 rows=1 width=12) (actual time=4.283..4.283 rows=0 loops=122850)
Recheck Cond: ((link0_.element_source = users5_.element_seqnum) AND (link0_.element_target = users3_.element_seqnum))
Filter: (link0_.link_sup_date IS NULL)
-> BitmapAnd (cost=45.50..45.50 rows=1 width=0) (actual time=4.280..4.280 rows=0 loops=122850)
-> Bitmap Index Scan on element_source_fk (cost=0.00..4.61 rows=21 width=0) (actual time=0.007..0.007 rows=6 loops=122850)
Index Cond: (link0_.element_source = users5_.element_seqnum)
-> Bitmap Index Scan on element_target_fk (cost=0.00..40.12 rows=2089 width=0) (actual time=4.719..4.719 rows=33814 loops=110880)
Index Cond: (link0_.element_target = users3_.element_seqnum)
-> Index Scan using pk_element on element element2_ (cost=0.00..4.41 rows=1 width=8) (actual time=0.009..0.011 rows=1 loops=6534)
Index Cond: (element2_.element_seqnum = link0_.element_source)
-> Index Scan using pk_element on element element1_ (cost=0.00..8.31 rows=1 width=4) (actual time=0.006..0.007 rows=1 loops=6534)
Index Cond: (element1_.element_seqnum = link0_.element_target)
-> Seq Scan on block block10_ (cost=0.00..1.14 rows=1 width=4) (actual time=0.005..0.007 rows=1 loops=6534)
Filter: (block10_.block_seqnum = 5)
-> Index Scan using fki_element_block_block on element_block blocks9_ (cost=0.00..8.30 rows=1 width=8) (actual time=0.007..0.030 rows=15 loops=6534)
Index Cond: (blocks9_.block_seqnum = 5)
-> Seq Scan on "user" user6_ (cost=0.00..5.89 rows=1 width=4) (actual time=0.006..0.048 rows=1 loops=14)
Filter: (user6_.user_seqnum = 10)
Total runtime: 535681.414 ms
MemTotal: 3087448 kB
MemFree: 2355500 kB
Buffers: 22212 kB
Cached: 396520 kB
SwapCached: 0 kB
Active: 387472 kB
Inactive: 289388 kB
Active(anon): 313808 kB
Inactive(anon): 0 kB
Active(file): 73664 kB
Inactive(file): 289388 kB
Unevictable: 0 kB
Mlocked: 0 kB
HighTotal: 2226696 kB
HighFree: 1560912 kB
LowTotal: 860752 kB
LowFree: 794588 kB
SwapTotal: 0 kB
SwapFree: 0 kB
Dirty: 6216 kB
Writeback: 0 kB
AnonPages: 258144 kB
Mapped: 127688 kB
Slab: 28196 kB
SReclaimable: 14624 kB
SUnreclaim: 13572 kB
PageTables: 5272 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 1543724 kB
Committed_AS: 913152 kB
VmallocTotal: 122880 kB
VmallocUsed: 11192 kB
VmallocChunk: 88472 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 4096 kB
DirectMap4k: 16376 kB
DirectMap4M: 892928 kB
# -----------------------------
# 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 = '/var/lib/postgresql/8.3/main' # use data in another directory
# (change requires restart)
hba_file = '/etc/postgresql/8.3/main/pg_hba.conf' # host-based authentication file
# (change requires restart)
ident_file = '/etc/postgresql/8.3/main/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 = '/var/run/postgresql/8.3-main.pid' # write an extra PID file
# (change requires restart)
#------------------------------------------------------------------------------
# CONNECTIONS AND AUTHENTICATION
#------------------------------------------------------------------------------
# - Connection Settings -
#listen_addresses = 'localhost' # 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). You might
# also need to raise shared_buffers to support more connections.
#superuser_reserved_connections = 3 # (change requires restart)
unix_socket_directory = '/var/run/postgresql' # (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 = true # (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 = 24MB # min 128kB or max_connections*16kB
# (change requires restart)
#temp_buffers = 8MB # min 800kB
#max_prepared_transactions = 5 # 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 = 153600 # 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 = '' # (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 = off # 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 = 100 # -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 ' # 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 = on # 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 = '"$user",public' # schema names
#default_tablespace = '' # a tablespace name, '' uses the default
#temp_tablespaces = '' # a list of tablespace names, '' uses
# only default tablespace
#check_function_bodies = on
#default_transaction_isolation = 'read committed'
#default_transaction_read_only = off
#session_replication_role = 'origin'
#statement_timeout = 0 # 0 is disabled
#vacuum_freeze_min_age = 100000000
#xmlbinary = 'base64'
#xmloption = 'content'
# - Locale and Formatting -
datestyle = 'iso, dmy'
#timezone = unknown # actually, defaults to TZ environment
# setting
#timezone_abbreviations = 'Default' # Select the set of available time zone
# abbreviations. Currently, there are
# Default
# Australia
# India
# You can create your own file in
# share/timezonesets/.
#extra_float_digits = 0 # min -15, max 2
#client_encoding = sql_ascii # actually, defaults to database
# encoding
# These settings are initialized by initdb, but they can be changed.
lc_messages = 'fr_FR.UTF-8' # locale for system error message
# strings
lc_monetary = 'fr_FR.UTF-8' # locale for monetary formatting
lc_numeric = 'fr_FR.UTF-8' # locale for number formatting
lc_time = 'fr_FR.UTF-8' # locale for time formatting
# default configuration for text search
default_text_search_config = 'pg_catalog.french'
# - Other Defaults -
#explain_pretty_print = on
#dynamic_library_path = '$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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