my boss want to migrate to ORACLE - Mailing list pgsql-performance

#
#       Shared Memory Size
#
#shared_buffers = 256           # min max_connections*2 or 16, 8KB each
#shared_buffers = 196000                # min max_connections*2 or 16, 8KB each
shared_buffers = 128000         # min max_connections*2 or 16, 8KB each
#max_fsm_relations = 1000       # min 10, fsm is free space map, ~40 bytes
max_fsm_pages = 1000000         # min 1000, fsm is free space map, ~6 bytes
#max_locks_per_transaction = 64 # min 10
#wal_buffers = 8                # min 4, typically 8KB each

 

#
#       Non-shared Memory Sizes
#
#sort_mem = 32168       # min 64, size in KB
#vacuum_mem = 8192              # min 1024, size in KB
vacuum_mem = 65536              # min 1024, size in KB

 

#
#       Write-ahead log (WAL)
#
#checkpoint_segments = 3        # in logfile segments, min 1, 16MB each
#checkpoint_timeout = 300       # range 30-3600, in seconds
#
#commit_delay = 0               # range 0-100000, in microseconds
#commit_siblings = 5            # range 1-1000
#
#fsync = true
#wal_sync_method = fsync        # the default varies across platforms:
#                               # fsync, fdatasync, open_sync, or open_datasync
#wal_debug = 0                  # range 0-16

 

#
#       Optimizer Parameters
#
#enable_seqscan = true
#enable_indexscan = true
#enable_tidscan = true
#enable_sort = true
#enable_nestloop = true
#enable_mergejoin = true
#enable_hashjoin = true

 

#effective_cache_size = 1000    # typically 8KB each
effective_cache_size = 196608   # 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)

 

#default_statistics_target = 10 # range 1-1000

 

#
#       GEQO Optimizer Parameters
#
#geqo = true
#geqo_selection_bias = 2.0      # range 1.5-2.0
#geqo_threshold = 11
#geqo_pool_size = 0             # default based on tables in statement,
                                # range 128-1024
#geqo_effort = 1
#geqo_generations = 0
#geqo_random_seed = -1          # auto-compute seed

 

#
#       Message display
#
server_min_messages =notice     # Values, in order of decreasing detail:
                                #   debug5, debug4, debug3, debug2, debug1,
                                #   info, notice, warning, error, log, fatal,
                                #   panic
client_min_messages =notice     # Values, in order of decreasing detail:
                                #   debug5, debug4, debug3, debug2, debug1,
                                #   log, info, notice, warning, error
#silent_mode = false

 

#log_connections =true
#log_pid =true
#log_statement =true
#log_duration =true
#log_timestamp =true

 

log_min_error_statement =error
# Values in order of increasing severity:
                                 #   debug5, debug4, debug3, debug2, debug1,
                                 #   info, notice, warning, error, panic(off)

 

#debug_print_parse = false
#debug_print_rewritten = false
#debug_print_plan = false
#debug_pretty_print = false

 

#explain_pretty_print = true

 

# requires USE_ASSERT_CHECKING
#debug_assertions = true

 

#
#       Syslog
#
syslog = 0                      # range 0-2
syslog_facility = 'LOCAL0'
syslog_ident = 'postgres'

 

#
#       Statistics
#
show_parser_stats = false
show_planner_stats =false
show_executor_stats = false
show_statement_stats =false

 

# requires BTREE_BUILD_STATS
#show_btree_build_stats = false

 

#
#       Access statistics collection
#
stats_start_collector = true
stats_reset_on_server_start = false
stats_command_string = true
stats_row_level = true
stats_block_level = true

 

#
#       Lock Tracing
#
#trace_notify = false

 

# requires LOCK_DEBUG
#trace_locks = false
#trace_userlocks = false
#trace_lwlocks = false
#debug_deadlocks = false
#trace_lock_oidmin = 16384
#trace_lock_table = 0

 

#
#       Misc
#
#autocommit = true
#dynamic_library_path = '$libdir'
#search_path = '$user,public'
#datestyle = 'iso, us'
#timezone = unknown             # actually, defaults to TZ environment setting
#australian_timezones = false
#client_encoding = sql_ascii    # actually, defaults to database encoding
#authentication_timeout = 60    # 1-600, in seconds
#deadlock_timeout = 1000        # in milliseconds
#default_transaction_isolation = 'read committed'
#max_expr_depth = 10000         # min 10
#max_files_per_process = 1000   # min 25
#password_encryption = true
#sql_inheritance = true
#transform_null_equals = false
#statement_timeout = 0          # 0 is disabled, in milliseconds
#db_user_namespace = false