performance very slow

Hi. i hava a postresql 7.4.2 in a production server.

tha machine is a Pentium IV 2,6 GHZ AND 1 GB IN RAM with lINUX RH 9.0.

The postresql.conf say:

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

# - Memory -

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

# - Free Space Map -

max_fsm_pages = 20000           # min max_fsm_relations*16, 6 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
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 = 100 # range 1-1000
from_collapse_limit = 30
join_collapse_limit = 30        # 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 = -1 # Log all statements whose
                                 # execution time exceeds the value, in
                                 # milliseconds.  Zero prints all queries.
                                 # Minus-one disables.

#silent_mode = false             # DO NOT USE without Syslog!

# - What to Log -



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


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

# - Statistics Monitoring -

log_parser_stats = true
log_planner_stats = true
log_executor_stats = true
#log_statement_stats = true

# - Query/Index Statistics Collector -

stats_start_collector = true
stats_command_string = true
stats_block_level = true
stats_row_level = true
stats_reset_on_server_start = true


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

# - Statement Behavior -

#search_path = '$user,public'   # schema names
#check_function_bodies = true
#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 = 'es_VE.UTF-8'             # locale for system error message
strings
lc_monetary = 'es_VE.UTF-8'             # locale for monetary formatting
lc_numeric = 'es_VE.UTF-8'              # locale for number formatting
lc_time = 'es_VE.UTF-8'                 # 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



BUT THE PERFORMANCE IT´S VERY SLOW

what can do ?????

Thank


Mario Soto