Re: index file bloating still in 7.4 ? - Mailing list pgsql-performance

Hi Josh,

Sample verbose analyze:

VACUUM VERBOSE ANALYZE hello_rda_or_key;
INFO:  vacuuming "craft.hello_rda_or_key"
INFO:  index "hello242_1105" now contains 740813 row versions in 2477 pages
DETAIL:  0 index pages have been deleted, 0 are currently reusable.
CPU 0.42s/0.13u sec elapsed 4.76 sec.
INFO:  "hello_rda_or_key": found 0 removable, 740813 nonremovable row
versions in 12778 pages
DETAIL:  440813 dead row versions cannot be removed yet.
There were 0 unused item pointers.
0 pages are entirely empty.
CPU 0.78s/0.66u sec elapsed 6.41 sec.
INFO:  analyzing "craft.hello_rda_or_key"
INFO:  "hello_rda_or_key": 12778 pages, 3000 rows sampled, 39388
estimated total rows
VACUUM

Here is my postgresql.conf file:

# -----------------------------
# 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.
#
# 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".


#---------------------------------------------------------------------------
# CONNECTIONS AND AUTHENTICATION
#---------------------------------------------------------------------------

# - Connection Settings -

#tcpip_socket = false
#max_connections = 100
max_connections = 600
         # note: increasing max_connections costs about 500 bytes of shared
         # memory per connection slot, in addition to costs from shared_buffers
         # and max_locks_per_transaction.
#superuser_reserved_connections = 2
#port = 5432
port = 5333
#unix_socket_directory = ''
#unix_socket_group = ''
#unix_socket_permissions = 0777 # octal
#virtual_host = ''              # what interface to listen on; defaults to any
#rendezvous_name = ''           # defaults to the computer name

# - Security & Authentication -

#authentication_timeout = 60    # 1-600, in seconds
#ssl = false
#password_encryption = true
#krb_server_keyfile = ''
#db_user_namespace = false


#---------------------------------------------------------------------------
# RESOURCE USAGE (except WAL)
#---------------------------------------------------------------------------

# - Memory -

#shared_buffers = 1000          # min 16, at least max_connections*2, 8KB each
shared_buffers = 1200           # min 16, at least max_connections*2, 8KB each
#sort_mem = 1024                # min 64, size in KB
sort_mem = 40960                # min 64, size in KB
#vacuum_mem = 8192              # min 1024, size in KB
vacuum_mem = 81920              # min 1024, size in KB

# - Free Space Map -

#max_fsm_pages = 20000          # min max_fsm_relations*16, 6 bytes each
max_fsm_pages = 50000          # min max_fsm_relations*16, 6 bytes each
#max_fsm_relations = 1000       # min 100, ~50 bytes each
max_fsm_relations = 1000        # min 100, ~50 bytes each

# - Kernel Resource Usage -

#max_files_per_process = 1000   # min 25
#preload_libraries = ''


#---------------------------------------------------------------------------
# WRITE AHEAD LOG
#---------------------------------------------------------------------------

# - Settings -

#fsync = true                   # turns forced synchronization on or off
fsync = false                   # turns forced synchronization on or off
#wal_sync_method = fsync        # the default varies across platforms:
                                 # fsync, fdatasync, open_sync, or open_datasync
#wal_buffers = 8                # min 4, 8KB each

# - Checkpoints -

#checkpoint_segments = 3        # in logfile segments, min 1, 16MB each
#checkpoint_timeout = 300       # range 30-3600, in seconds
#checkpoint_warning = 30        # 0 is off, in seconds
#commit_delay = 0               # range 0-100000, in microseconds
#commit_siblings = 5            # range 1-1000


#---------------------------------------------------------------------------
# QUERY TUNING
#---------------------------------------------------------------------------

# - Planner Method Enabling -

#enable_hashagg = true
#enable_hashjoin = true
#enable_indexscan = true
#enable_mergejoin = true
#enable_nestloop = true
#enable_seqscan = true
#enable_sort = true
#enable_tidscan = true

# - 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 = true
#geqo_threshold = 11
#geqo_effort = 1
#geqo_generations = 0
#geqo_pool_size = 0             # default based on tables in statement,
                                 # range 128-1024
#geqo_selection_bias = 2.0      # range 1.5-2.0

# - Other Planner Options -

#default_statistics_target = 10 # range 1-1000
#from_collapse_limit = 8
#join_collapse_limit = 8        # 1 disables collapsing of explicit JOINs


#---------------------------------------------------------------------------
# ERROR REPORTING AND LOGGING
#---------------------------------------------------------------------------

# - Syslog -

#syslog = 0                     # range 0-2; 0=stdout; 1=both; 2=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, info, 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 = 0  # Log all statements whose
                                  # execution time exceeds the value, in
                                  # milliseconds.  Zero disables.

#silent_mode = false             # DO NOT USE without Syslog!

# - What to Log -

#debug_print_parse = false
#debug_print_rewritten = false
#debug_print_plan = false
#debug_pretty_print = false
#log_connections = false
#log_duration = false
#log_pid = false
#log_statement = false
#log_timestamp = false
#log_hostname = false
#log_source_port = false


#---------------------------------------------------------------------------
# RUNTIME STATISTICS
#---------------------------------------------------------------------------

# - Statistics Monitoring -

#log_parser_stats = false
#log_planner_stats = false
#log_executor_stats = false
#log_statement_stats = false

# - Query/Index Statistics Collector -

#stats_start_collector = true
#stats_command_string = false
#stats_block_level = false
#stats_row_level = false
#stats_reset_on_server_start = true


#---------------------------------------------------------------------------
# CLIENT CONNECTION DEFAULTS
#---------------------------------------------------------------------------

# - Statement Behavior -

#search_path = '$user,public'   # schema names
#default_transaction_isolation = 'read committed'
#default_transaction_read_only = false
#statement_timeout = 0          # 0 is disabled, in milliseconds

# - Locale and Formatting -

#datestyle = 'iso, mdy'
#timezone = unknown             # actually, defaults to TZ environment setting
#australian_timezones = false
#extra_float_digits = 0         # min -15, max 2
#client_encoding = sql_ascii    # actually, defaults to database encoding

# These settings are initialized by initdb -- they may 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 = true
#dynamic_library_path = '$libdir'
#max_expr_depth = 10000         # min 10


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

#deadlock_timeout = 1000        # in milliseconds
#max_locks_per_transaction = 64 # min 10, ~260*max_connections bytes each


#---------------------------------------------------------------------------
# VERSION/PLATFORM COMPATIBILITY
#---------------------------------------------------------------------------

# - Previous Postgres Versions -

#add_missing_from = true
#regex_flavor = advanced        # advanced, extended, or basic
#sql_inheritance = true

# - Other Platforms & Clients -

#transform_null_equals = false

At 2:58 pm -0700 2003/10/18, Josh Berkus wrote:
>Gan,
>
>>  Is the index bloating issue still not resolved in 7.4beta4 ?
>
>No, it should be.  Please post your max_fsm_pages setting, and the output of a
>sample VACUUM VERBOSE ANALYZE.   You probably don't have your FSM set right.
>
>
>--
>-Josh Berkus
>  Aglio Database Solutions
>  San Francisco
>
>
>---------------------------(end of broadcast)---------------------------
>TIP 7: don't forget to increase your free space map settings


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