Please help

Hi all,

Without modifying anything, postgresql (since  today) has a strange
behavior:

All connections are rejected with No space left on device.

There's plenty of space in shm, disk...

It occurs on UNIX as well as on INET socket.
I can't even shut the postmaster down (it doesn't respond) and have a few
defunct process.


SHMAX is at 40000000 here, version is 7.2.3 
Heres postgresql.conf:
#
# PostgreSQL configuration file
# -----------------------------
#
# This file consists of lines of the form
#
#   name = value
#
# (The `=' is optional.) White space is collapsed, comments are
# introduced by `#' 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.


#========================================================================


#
#    Connection Parameters
#
tcpip_socket = true
#ssl = false

max_connections = 64

port = 5432 
hostname_lookup = true
#show_source_port = false

#unix_socket_directory = ''
#unix_socket_group = ''
#unix_socket_permissions = 0777

#virtual_host = ''

#krb_server_keyfile = ''


#
#    Shared Memory Size
#
shared_buffers = 512        # 2*max_connections, min 16
#max_fsm_relations = 100    # min 10, fsm is free space map
#max_fsm_pages = 10000      # min 1000, fsm is free space map
#max_locks_per_transaction = 64 # min 10
#wal_buffers = 8            # min 4

#
#    Non-shared Memory Sizes
#
sort_mem = 10240             # min 32
#vacuum_mem = 8192          # min 1024


#
#    Write-ahead log (WAL)
#
#wal_files = 4 # range 0-64
#wal_sync_method = fsync   # the default varies across platforms:
#               # fsync, fdatasync, open_sync, or open_datasync
#wal_debug = 0             # range 0-16
#commit_delay = 0          # range 0-100000
#commit_siblings = 5       # range 1-1000
#checkpoint_segments = 3   # in logfile segments (16MB each), min 1
#checkpoint_timeout = 300  # in seconds, range 30-3600
#fsync = true


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

#ksqo = false

#effective_cache_size = 1000  # default in 8k pages
#random_page_cost = 4
#cpu_tuple_cost = 0.01
#cpu_index_tuple_cost = 0.001
#cpu_operator_cost = 0.0025


#
#    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 query, range 128-1024
#geqo_effort = 1
#geqo_generations = 0
#geqo_random_seed = -1     # auto-compute seed


#
#    Debug display
#
#silent_mode = false

log_connections = true
#log_timestamp = true
log_pid = true

#debug_level = 0 # range 0-16

debug_print_query = true
#debug_print_parse = false
#debug_print_rewritten = false
#debug_print_plan = false
debug_pretty_print = true

# requires USE_ASSERT_CHECKING
#debug_assertions = true


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


#
#    Statistics
#
show_parser_stats = false
show_planner_stats = false
show_executor_stats = false
show_query_stats = false

# requires BTREE_BUILD_STATS
#show_btree_build_stats = false


#
#    Access statistics collection
#
stats_start_collector = true
stats_reset_on_server_start = true
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
#
#dynamic_library_path = '$libdir'
#australian_timezones = false
#authentication_timeout = 60    # min 1, max 600
#deadlock_timeout = 1000
#default_transaction_isolation = 'read committed'
#max_expr_depth = 10000         # min 10
#max_files_per_process = 1000   # min 25
#password_encryption = false
#sql_inheritance = true
#transform_null_equals = false

Anyone can come with an idea?

It NEVER happend before...
-- 
Olivier PRENANT             Tel:    +33-5-61-50-97-00 (Work)
Quartier d'Harraud Turrou           +33-5-61-50-97-01 (Fax)
31190 AUTERIVE                      +33-6-07-63-80-64 (GSM)
FRANCE                      Email: ohp@pyrenet.fr
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