No subject
Mon Nov 14 14:56:52 JST 2011
[root at pgpoolhost pgpool-II]# /usr/sbin/lsof | grep TCP | grep 52847
pgpool 4160 root 8u IPv4 28483861 TCP
pgpoolhost.localdomain:52847->postgresdb:postgres (ESTABLISHED)
[root at pgpoolhost pgpool-II]# ps gaxuwww | grep 4160
root 1991 0.0 0.0 61200 784 pts/1 R+ 23:00 0:00 grep 4160
root 4160 0.0 0.5 68996 5516 ? S 21:15 0:00 pgpool:
companyname companyname 10.11.12.13(51372) idle in transaction
[root at pgpoolhost pgpool-II]# gdb /usr/bin/pgpool
GNU gdb (GDB) Red Hat Enterprise Linux (7.0.1-37.el5_7.1)
Copyright (C) 2009 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-redhat-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /usr/bin/pgpool...Reading symbols from
/usr/lib/debug/usr/bin/pgpool.debug...done.
done.
(gdb) attach 4160
Attaching to program: /usr/bin/pgpool, process 4160
Reading symbols from /usr/pgsql-9.1/lib/libpq.so.5...(no debugging symbols
found)...done.
Loaded symbols for /usr/pgsql-9.1/lib/libpq.so.5
Reading symbols from /usr/lib64/libpcp.so.0...Reading symbols from
/usr/lib/debug/usr/lib64/libpcp.so.0.0.0.debug...done.
done.
Loaded symbols for /usr/lib64/libpcp.so.0
Reading symbols from /lib64/libpam.so.0...(no debugging symbols found)...done.
Loaded symbols for /lib64/libpam.so.0
Reading symbols from /lib64/libssl.so.6...warning: the debug information found
in "/usr/lib/debug//lib64/libssl.so.0.9.8e.debug" does not match
"/lib64/libssl.so.6" (CRC mismatch).
warning: the debug information found in
"/usr/lib/debug/lib64/libssl.so.0.9.8e.debug" does not match
"/lib64/libssl.so.6" (CRC mismatch).
(no debugging symbols found)...done.
Loaded symbols for /lib64/libssl.so.6
Reading symbols from /lib64/libcrypto.so.6...warning: the debug information
found in "/usr/lib/debug//lib64/libcrypto.so.0.9.8e.debug" does not match
"/lib64/libcrypto.so.6" (CRC mismatch).
warning: the debug information found in
"/usr/lib/debug/lib64/libcrypto.so.0.9.8e.debug" does not match
"/lib64/libcrypto.so.6" (CRC mismatch).
(no debugging symbols found)...done.
Loaded symbols for /lib64/libcrypto.so.6
Reading symbols from /lib64/libcrypt.so.1...warning: the debug information
found in "/usr/lib/debug//lib64/libcrypt-2.5.so.debug" does not match
"/lib64/libcrypt.so.1" (CRC mismatch).
warning: the debug information found in
"/usr/lib/debug/lib64/libcrypt-2.5.so.debug" does not match
"/lib64/libcrypt.so.1" (CRC mismatch).
(no debugging symbols found)...done.
Loaded symbols for /lib64/libcrypt.so.1
Reading symbols from /lib64/libresolv.so.2...warning: the debug information
found in "/usr/lib/debug//lib64/libresolv-2.5.so.debug" does not match
"/lib64/libresolv.so.2" (CRC mismatch).
warning: the debug information found in
"/usr/lib/debug/lib64/libresolv-2.5.so.debug" does not match
"/lib64/libresolv.so.2" (CRC mismatch).
(no debugging symbols found)...done.
Loaded symbols for /lib64/libresolv.so.2
Reading symbols from /lib64/libnsl.so.1...warning: the debug information found
in "/usr/lib/debug//lib64/libnsl-2.5.so.debug" does not match
"/lib64/libnsl.so.1" (CRC mismatch).
warning: the debug information found in
"/usr/lib/debug/lib64/libnsl-2.5.so.debug" does not match "/lib64/libnsl.so.1"
(CRC mismatch).
(no debugging symbols found)...done.
Loaded symbols for /lib64/libnsl.so.1
Reading symbols from /lib64/libm.so.6...warning: the debug information found
in "/usr/lib/debug//lib64/libm-2.5.so.debug" does not match "/lib64/libm.so.6"
(CRC mismatch).
warning: the debug information found in
"/usr/lib/debug/lib64/libm-2.5.so.debug" does not match "/lib64/libm.so.6"
(CRC mismatch).
(no debugging symbols found)...done.
Loaded symbols for /lib64/libm.so.6
Reading symbols from /lib64/libc.so.6...warning: the debug information found
in "/usr/lib/debug//lib64/libc-2.5.so.debug" does not match "/lib64/libc.so.6"
(CRC mismatch).
warning: the debug information found in
"/usr/lib/debug/lib64/libc-2.5.so.debug" does not match "/lib64/libc.so.6"
(CRC mismatch).
(no debugging symbols found)...done.
Loaded symbols for /lib64/libc.so.6
Reading symbols from /usr/lib64/libgssapi_krb5.so.2...(no debugging symbols
found)...done.
Loaded symbols for /usr/lib64/libgssapi_krb5.so.2
Reading symbols from /usr/lib64/libldap_r-2.3.so.0...(no debugging symbols
found)...done.
Loaded symbols for /usr/lib64/libldap_r-2.3.so.0
Reading symbols from /lib64/libpthread.so.0...warning: the debug information
found in "/usr/lib/debug//lib64/libpthread-2.5.so.debug" does not match
"/lib64/libpthread.so.0" (CRC mismatch).
warning: the debug information found in
"/usr/lib/debug/lib64/libpthread-2.5.so.debug" does not match
"/lib64/libpthread.so.0" (CRC mismatch).
(no debugging symbols found)...done.
[Thread debugging using libthread_db enabled]
Loaded symbols for /lib64/libpthread.so.0
Reading symbols from /lib64/libdl.so.2...warning: the debug information found
in "/usr/lib/debug//lib64/libdl-2.5.so.debug" does not match
"/lib64/libdl.so.2" (CRC mismatch).
warning: the debug information found in
"/usr/lib/debug/lib64/libdl-2.5.so.debug" does not match "/lib64/libdl.so.2"
(CRC mismatch).
(no debugging symbols found)...done.
Loaded symbols for /lib64/libdl.so.2
Reading symbols from /lib64/libaudit.so.0...(no debugging symbols found)...done.
Loaded symbols for /lib64/libaudit.so.0
Reading symbols from /usr/lib64/libkrb5.so.3...(no debugging symbols
found)...done.
Loaded symbols for /usr/lib64/libkrb5.so.3
Reading symbols from /lib64/libcom_err.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib64/libcom_err.so.2
Reading symbols from /usr/lib64/libk5crypto.so.3...(no debugging symbols
found)...done.
Loaded symbols for /usr/lib64/libk5crypto.so.3
Reading symbols from /usr/lib64/libz.so.1...(no debugging symbols found)...done.
Loaded symbols for /usr/lib64/libz.so.1
Reading symbols from /lib64/ld-linux-x86-64.so.2...warning: the debug
information found in "/usr/lib/debug//lib64/ld-2.5.so.debug" does not match
"/lib64/ld-linux-x86-64.so.2" (CRC mismatch).
warning: the debug information found in "/usr/lib/debug/lib64/ld-2.5.so.debug"
does not match "/lib64/ld-linux-x86-64.so.2" (CRC mismatch).
(no debugging symbols found)...done.
Loaded symbols for /lib64/ld-linux-x86-64.so.2
Reading symbols from /usr/lib64/libkrb5support.so.0...(no debugging symbols
found)...done.
Loaded symbols for /usr/lib64/libkrb5support.so.0
Reading symbols from /lib64/libkeyutils.so.1...(no debugging symbols
found)...done.
Loaded symbols for /lib64/libkeyutils.so.1
Reading symbols from /usr/lib64/liblber-2.3.so.0...(no debugging symbols
found)...done.
Loaded symbols for /usr/lib64/liblber-2.3.so.0
Reading symbols from /usr/lib64/libsasl2.so.2...(no debugging symbols
found)...done.
Loaded symbols for /usr/lib64/libsasl2.so.2
Reading symbols from /lib64/libselinux.so.1...(no debugging symbols found)...done.
Loaded symbols for /lib64/libselinux.so.1
Reading symbols from /lib64/libsepol.so.1...(no debugging symbols found)...done.
Loaded symbols for /lib64/libsepol.so.1
warning: no loadable sections found in added symbol-file system-supplied DSO
at 0x7fff307fd000
0x00002b47147dd763 in __select_nocancel () from /lib64/libc.so.6
(gdb) bt
#0 0x00002b47147dd763 in __select_nocancel () from /lib64/libc.so.6
#1 0x0000000000415a61 in pool_check_fd (cp=<value optimized out>) at
pool_process_query.c:1062
#2 0x000000000041a244 in pool_read (cp=0x405c0d0, buf=0x7fff307a7e7f, len=1)
at pool_stream.c:138
#3 0x00000000004190cd in read_kind_from_backend (frontend=0x4046d50,
backend=0x4059f30, decided_kind=0x7fff307a8087 "2\001")
at pool_process_query.c:3502
#4 0x0000000000443af2 in ProcessBackendResponse (frontend=0x4046d50,
backend=0x4059f30, state=0x7fff307a8278, num_fields=0x7fff307a827c) at
pool_proto_modules.c:2191
#5 0x0000000000417be6 in pool_process_query (frontend=0x4046d50,
backend=0x4059f30, reset_request=0) at pool_process_query.c:428
#6 0x000000000040a67a in do_child (unix_fd=5, inet_fd=6) at child.c:354
#7 0x0000000000404a05 in fork_a_child (unix_fd=5, inet_fd=6, id=193) at
main.c:1083
#8 0x0000000000404d07 in reaper () at main.c:2168
#9 0x0000000000407cf5 in main (argc=<value optimized out>, argv=<value
optimized out>) at main.c:596
(gdb) quit
A debugging session is active.
Inferior 1 [process 4160] will be detached.
Quit anyway? (y or n) y
Detaching from program: /usr/bin/pgpool, process 4160
[root at pgpoolhost pgpool-II]# strace -fvp 4160
Process 4160 attached - interrupt to quit
select(9, [8], NULL, [8], NULL <unfinished ...>
Process 4160 detached
[root at pgpoolhost pgpool-II]#
Finally, the pgpool.conf:
#
# pgpool-II configuration file sample for Stream replication/Hot standby.
# $Header:
/cvsroot/pgpool/pgpool-web/contrib_docs/simple_sr_setting2/pgpool.conf,v 1.1
2011/03/11 05:29:13 t-ishii Exp $
# Host name or IP address to listen on: '*' for all, '' for no TCP/IP
# connections
listen_addresses = '*'
# Port number for pgpool
port = 5432
# Port number for pgpool communication manager
pcp_port = 9898
# Unix domain socket path. (The Debian package defaults to
# /var/run/postgresql.)
socket_dir = '/tmp'
# Unix domain socket path for pgpool communication manager.
# (Debian package defaults to /var/run/postgresql)
pcp_socket_dir = '/tmp'
# Unix domain socket path for the backend. Debian package defaults to
/var/run/postgresql!
#backend_socket_dir = '/tmp'
# pgpool communication manager timeout. 0 means no timeout. This parameter is
ignored now.
pcp_timeout = 10
# number of pre-forked child process
num_init_children = 200
# Number of connection pools allowed for a child process
max_pool = 2
# If idle for this many seconds, child exits. 0 means no timeout.
child_life_time = 300
# If idle for this many seconds, connection to PostgreSQL closes.
# 0 means no timeout.
connection_life_time = 0
# If child_max_connections connections were received, child exits.
# 0 means no exit.
child_max_connections = 0
# If client_idle_limit is n (n > 0), the client is forced to be
# disconnected whenever after n seconds idle (even inside an explicit
# transactions!)
# 0 means no disconnect.
#client_idle_limit = 3600
client_idle_limit = 0
# Maximum time in seconds to complete client authentication.
# 0 means no timeout.
authentication_timeout = 60
# Logging directory (not really, is actually just state dir)
logdir = '/tmp'
# where logs actually go
log_destination = 'syslog'
# pid file name
pid_file_name = '/var/run/pgpool/pgpool.pid'
# Replication mode
replication_mode = false
# Load balancing mode, i.e., all SELECTs are load balanced.
load_balance_mode = true
# If there's a disagreement with the packet kind sent from backend,
# then degenrate the node which is most likely "minority". If false,
# just force to exit this session.
replication_stop_on_mismatch = false
# If there's a disagreement with the number of affected tuples in
# UPDATE/DELETE, then degenrate the node which is most likely
# "minority".
# If false, just abort the transaction to keep the consistency.
failover_if_affected_tuples_mismatch = false
# If true, replicate SELECT statement when replication_mode or parallel_mode
is enabled.
# A priority of replicate_select is higher than load_balance_mode.
replicate_select = false
# Semicolon separated list of queries to be issued at the end of a
# session
reset_query_list = 'ABORT; DISCARD ALL'
# for 8.2 or older this should be as follows.
#reset_query_list = 'ABORT; RESET ALL; SET SESSION AUTHORIZATION DEFAULT'
# white_function_list is a comma separated list of function names
# those do not write to database. Any functions not listed here
# are regarded to write to database and SELECTs including such
# writer-functions will be executed on master(primary) in master/slave
# mode, or executed on all DB nodes in replication mode.
#
# black_function_list is a comma separated list of function names
# those write to database. Any functions not listed here
# are regarded not to write to database and SELECTs including such
# read-only-functions will be executed on any DB nodes.
#
# You cannot make full both white_function_list and
# black_function_list at the same time. If you specify something in
# one of them, you should make empty other.
#
# Pre 3.0 pgpool-II recognizes nextval and setval in hard coded
# way. Following setting will do the same as the previous version.
# white_function_list = ''
# black_function_list = 'nextval,setval'
white_function_list = ''
black_function_list = 'nextval,setval'
# If true print timestamp on each log line.
print_timestamp = false
# If true, operate in master/slave mode.
master_slave_mode = true
# Master/slave sub mode. either 'slony' or 'stream'. Default is 'slony'.
master_slave_sub_mode = 'stream'
# If the standby server delays more than delay_threshold,
# any query goes to the primary only. The unit is in bytes.
# 0 disables the check. Default is 0.
# Note that health_check_period required to be greater than 0
# to enable the functionality.
delay_threshold = 100000
# 'always' logs the standby delay whenever health check runs.
# 'if_over_threshold' logs only if the delay exceeds delay_threshold.
# 'none' disables the delay log.
log_standby_delay = 'if_over_threshold'
# If true, cache connection pool.
connection_cache = true
# Health check timeout. 0 means no timeout.
health_check_timeout = 10
# Health check period. 0 means no health check.
health_check_period = 20
# Health check user
health_check_user = 'health_check'
sr_check_user = 'health_check'
sr_check_period = 5
# Execute command by failover.
# special values: %d = node id
# %h = host name
# %p = port number
# %D = database cluster path
# %m = new master node id
# %H = hostname of the new master node
# %M = old master node id
# %P = old primary node id
# %% = '%' character
#
failover_command = '/usr/local/etc/failover.sh %d "%h" %p %D %m %M "%H" %P'
# Execute command by failback.
# special values: %d = node id
# %h = host name
# %p = port number
# %D = database cluster path
# %m = new master node id
# %H = hostname of the new master node
# %M = old master node id
# %P = old primary node id
# %% = '%' character
#
failback_command = ''
# If true, trigger fail over when writing to the backend communication
# socket fails. This is the same behavior of pgpool-II 2.2.x or
# earlier. If set to false, pgpool will report an error and disconnect
# the session.
fail_over_on_backend_error = true
# If true, automatically locks a table with INSERT statements to keep
# SERIAL data consistency. If the data does not have SERIAL data
# type, no lock will be issued. An /*INSERT LOCK*/ comment has the
# same effect. A /*NO INSERT LOCK*/ comment disables the effect.
insert_lock = false
# If true, ignore leading white spaces of each query while pgpool judges
# whether the query is a SELECT so that it can be load balanced. This
# is useful for certain APIs such as DBI/DBD which is known to adding an
# extra leading white space.
ignore_leading_white_space = true
# If true, print all statements to the log. Like the log_statement option
# to PostgreSQL, this allows for observing queries without engaging in full
# debugging.
log_statement = false
# If true, print all statements to the log. Similar to log_statement except
# that prints DB node id and backend process id info.
log_per_node_statement = false
# If true, incoming connections will be printed to the log.
log_connections = true
# If true, hostname will be shown in ps status. Also shown in
# connection log if log_connections = true.
# Be warned that this feature will add overhead to look up hostname.
log_hostname = false
# if non 0, run in parallel query mode
parallel_mode = false
# if non 0, use query cache
enable_query_cache = false
#set pgpool2 hostname
pgpool2_hostname = ''
# system DB info
system_db_hostname = 'localhost'
system_db_port = 5432
system_db_dbname = 'pgpool'
system_db_schema = 'pgpool_catalog'
system_db_user = 'pgpool'
system_db_password = ''
# - HBA -
# If true, use pool_hba.conf for client authentication.
enable_pool_hba = false
# - online recovery -
# online recovery user
recovery_user = 'postgres'
# online recovery password
recovery_password = 'PWORD'
# execute a command in first stage.
recovery_1st_stage_command = 'basebackup.sh'
# execute a command in second stage.
recovery_2nd_stage_command = ''
# maximum time in seconds to wait for the recovering node's postmaster
# start-up. 0 means no wait.
# this is also used as a timer waiting for clients disconnected before
# starting 2nd stage
recovery_timeout = 90
# If client_idle_limit_in_recovery is n (n > 0), the client is forced
# to be disconnected whenever after n seconds idle (even inside an
# explicit transactions!) in the second stage of online recovery.
# n = -1 forces clients to be disconnected immediately.
# 0 disables this functionality(wait forever).
# This parameter only takes effect in recovery 2nd stage.
client_idle_limit_in_recovery = 0
# Specify table name to lock. This is used when rewriting lo_creat
# command in replication mode. The table must exist and has writable
# permission to public. If the table name is '', no rewriting occurs.
lobj_lock_table = ''
# If true, enable SSL support for both frontend and backend connections.
# note that you must also set ssl_key and ssl_cert for SSL to work in
# the frontend connections.
ssl = true
#ssl = false
# path to the SSL private key file
ssl_key = '/etc/pgpool-II/server.key'
# path to the SSL public certificate file
ssl_cert = '/etc/pgpool-II/server.crt'
# If either ssl_ca_cert or ssl_ca_cert_dir is set, then certificate
# verification will be performed to establish the authenticity of the
# certificate. If neither is set to a nonempty string then no such
# verification takes place. ssl_ca_cert should be a path to a single
# PEM format file containing CA root certificate(s), whereas ssl_ca_cert_dir
# should be a directory containing such files. These are analagous to the
# -CAfile and -CApath options to openssl verify(1), respectively.
#ssl_ca_cert = ''
#ssl_ca_cert = '/etc/pgpool-II/root.crt'
#ssl_ca_cert_dir = ''
# Debug message verbosity level. 0: no message, 1 <= : more verbose
debug_level = 1
# Noe info goes here!
# backend_hostname, backend_port, backend_weight
# here are examples
backend_hostname0 = '10.11.22.23'
backend_port0 = 5432
backend_weight0 = 1
backend_data_directory0 = '/var/lib/pgsql/9.1/data'
backend_hostname1 = '10.11.32.33'
backend_port1 = 5432
backend_weight1 = 1
backend_data_directory1 = '/var/lib/pgsql/9.1/data'
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