[pgpool-general: 4093] issue with single node failover

Travis Kirstine tkirstine at firstbasesolutions.com
Tue Oct 6 22:50:27 JST 2015


I have pgpool 3.4.3 (from the pgdb93 repo) setup in raw mode pointing to a
single backend node on a separate server.  I would like set pgpool to
failover to the single node and attempt to reconnect indefinitely.  For
some reason I can't get the config right or it may be a bug?  I have it
working in a different environment using pgpool 3.2 from the epel repo

Any help would be greatly appreciated.


# Log

2015-10-06 09:45:49: pid 13371: DETAIL:  postmaster on DB node 0 was
shutdown by administrative command
2015-10-06 09:45:49: pid 13371: LOG:  received degenerate backend request
for node_id: 0 from pid [13371]
2015-10-06 09:45:49: pid 13361: LOG:  starting degeneration. shutdown host
172.16.0.59(5432)
2015-10-06 09:45:49: pid 13361: LOG:  failover: no valid backends node found
2015-10-06 09:45:49: pid 13361: LOG:  Restart all children
2015-10-06 09:45:49: pid 13361: LOG:  failover: set new primary node: -1
2015-10-06 09:45:49: pid 13374: LOG:  child process received shutdown
request signal 3
2015-10-06 09:45:49: pid 13370: LOG:  child process received shutdown
request signal 3
2015-10-06 09:45:49: pid 13376: LOG:  child process received shutdown
request signal 3
2015-10-06 09:45:49: pid 13367: LOG:  child process received shutdown
request signal 3
2015-10-06 09:45:49: pid 13363: LOG:  child process received shutdown
request signal 3
2015-10-06 09:45:49: pid 13373: LOG:  child process received shutdown
request signal 3
2015-10-06 09:45:49: pid 13372: LOG:  child process received shutdown
request signal 3
2015-10-06 09:45:49: pid 13365: LOG:  child process received shutdown
request signal 3
2015-10-06 09:45:49: pid 13364: LOG:  child process received shutdown
request signal 3
2015-10-06 09:45:49: pid 13377: LOG:  child process received shutdown
request signal 3
2015-10-06 09:45:49: pid 13366: LOG:  child process received shutdown
request signal 3
2015-10-06 09:45:49: pid 13375: LOG:  child process received shutdown
request signal 3
2015-10-06 09:45:49: pid 13368: LOG:  child process received shutdown
request signal 3
2015-10-06 09:45:49: pid 13369: LOG:  child process received shutdown
request signal 3
2015-10-06 09:45:49: pid 13371: LOG:  child process received shutdown
request signal 3
2015-10-06 09:45:49: pid 13379: LOG:  worker process received restart
request
failover done. shutdown host 172.16.0.59(5432)2015-10-06 09:45:49: pid
13361: LOG:  failover done. shutdown host 172.16.0.59(5432)
2015-10-06 09:45:50: pid 13378: LOG:  restart request received in pcp child
process
2015-10-06 09:45:50: pid 13361: LOG:  PCP child 13378 exits with status 256
in failover()
2015-10-06 09:45:50: pid 13361: LOG:  fork a new PCP child pid 13399 in
failover()
2015-10-06 09:45:50: pid 13361: LOG:  child process with pid: 13363 exits
with status 0
2015-10-06 09:45:50: pid 13361: LOG:  child process with pid: 13363 exited
with success and will not be restarted
2015-10-06 09:45:50: pid 13361: LOG:  child process with pid: 13364 exits
with status 0
2015-10-06 09:45:50: pid 13361: LOG:  child process with pid: 13364 exited
with success and will not be restarted
2015-10-06 09:45:50: pid 13361: LOG:  child process with pid: 13365 exits
with status 0
2015-10-06 09:45:50: pid 13361: LOG:  child process with pid: 13365 exited
with success and will not be restarted
2015-10-06 09:45:50: pid 13361: LOG:  child process with pid: 13366 exits
with status 0
2015-10-06 09:45:50: pid 13361: LOG:  child process with pid: 13366 exited
with success and will not be restarted
2015-10-06 09:45:50: pid 13361: LOG:  child process with pid: 13367 exits
with status 0
2015-10-06 09:45:50: pid 13361: LOG:  child process with pid: 13367 exited
with success and will not be restarted
2015-10-06 09:45:50: pid 13361: LOG:  child process with pid: 13368 exits
with status 0
2015-10-06 09:45:50: pid 13361: LOG:  child process with pid: 13368 exited
with success and will not be restarted
2015-10-06 09:45:50: pid 13361: LOG:  child process with pid: 13369 exits
with status 0
2015-10-06 09:45:50: pid 13361: LOG:  child process with pid: 13369 exited
with success and will not be restarted
2015-10-06 09:45:50: pid 13361: LOG:  child process with pid: 13370 exits
with status 0
2015-10-06 09:45:50: pid 13361: LOG:  child process with pid: 13370 exited
with success and will not be restarted
2015-10-06 09:45:50: pid 13361: LOG:  child process with pid: 13371 exits
with status 0
2015-10-06 09:45:50: pid 13361: LOG:  child process with pid: 13371 exited
with success and will not be restarted
2015-10-06 09:45:50: pid 13361: LOG:  child process with pid: 13372 exits
with status 0
2015-10-06 09:45:50: pid 13361: LOG:  child process with pid: 13372 exited
with success and will not be restarted
2015-10-06 09:45:50: pid 13361: LOG:  child process with pid: 13373 exits
with status 0
2015-10-06 09:45:50: pid 13361: LOG:  child process with pid: 13373 exited
with success and will not be restarted
2015-10-06 09:45:50: pid 13361: LOG:  child process with pid: 13374 exits
with status 0
2015-10-06 09:45:50: pid 13361: LOG:  child process with pid: 13374 exited
with success and will not be restarted
2015-10-06 09:45:50: pid 13361: LOG:  child process with pid: 13375 exits
with status 0
2015-10-06 09:45:50: pid 13361: LOG:  child process with pid: 13375 exited
with success and will not be restarted
2015-10-06 09:45:50: pid 13361: LOG:  child process with pid: 13376 exits
with status 0
2015-10-06 09:45:50: pid 13361: LOG:  child process with pid: 13376 exited
with success and will not be restarted
2015-10-06 09:45:50: pid 13361: LOG:  child process with pid: 13377 exits
with status 0
2015-10-06 09:45:50: pid 13361: LOG:  child process with pid: 13377 exited
with success and will not be restarted
2015-10-06 09:45:50: pid 13361: LOG:  worker child process with pid: 13379
exits with status 256
2015-10-06 09:45:50: pid 13361: LOG:  fork a new worker child process with
pid: 13400
2015-10-06 09:46:02: pid 13392: FATAL:  pgpool is not accepting any new
connections
2015-10-06 09:46:02: pid 13392: DETAIL:  all backend nodes are down, pgpool
requires atleast one valid node
2015-10-06 09:46:02: pid 13392: HINT:  repair the backend nodes and restart
pgpool
2015-10-06 09:46:02: pid 13361: LOG:  child process with pid: 13392 exits
with status 256
2015-10-06 09:46:02: pid 13361: LOG:  fork a new child process with pid:
13401
2015-10-06 09:46:27: pid 13401: FATAL:  pgpool is not accepting any new
connections
2015-10-06 09:46:27: pid 13401: DETAIL:  all backend nodes are down, pgpool
requires atleast one valid node
2015-10-06 09:46:27: pid 13401: HINT:  repair the backend nodes and restart
pgpool
2015-10-06 09:46:27: pid 13361: LOG:  child process with pid: 13401 exits
with status 256
2015-10-06 09:46:27: pid 13361: LOG:  fork a new child process with pid:
13410
2015-10-06 09:46:34: pid 13390: FATAL:  pgpool is not accepting any new
connections
2015-10-06 09:46:34: pid 13390: DETAIL:  all backend nodes are down, pgpool
requires atleast one valid node
2015-10-06 09:46:34: pid 13390: HINT:  repair the backend nodes and restart
pgpool
2015-10-06 09:46:34: pid 13361: LOG:  child process with pid: 13390 exits
with status 256
2015-10-06 09:46:34: pid 13361: LOG:  fork a new child process with pid:
13412





# Config File

#------------------------------------------------------------------------------
# CONNECTIONS
#------------------------------------------------------------------------------

# - pgpool Connection Settings -

listen_addresses = '*'
                                   # Host name or IP address to listen on:
                                   # '*' for all, '' for no TCP/IP
connections
                                   # (change requires restart)
port = 9999
                                   # Port number
                                   # (change requires restart)
socket_dir = '/var/run/pgpool-II-93'
                                   # Unix domain socket path
                                   # (change requires restart)


# - pgpool Communication Manager Connection Settings -

pcp_port = 9898
                                   # Port number for pcp
                                   # (change requires restart)
pcp_socket_dir = '/var/run/pgpool-II-93'
                                   # Unix domain socket path for pcp
                                   # (change requires restart)

# - Backend Connection Settings -

backend_hostname0 = '172.16.0.59'
                                   # Host name or IP address to connect to
for backend 0
backend_port0 = 5432
                                   # Port number for backend 0
# backend_weight0 = 1
                                   # Weight for backend 0 (only in load
balancing mode)
# backend_data_directory0 = '/var/lib/pgsql/9.3/data'
                                   # Data directory for backend 0
backend_flag0 = 'ALLOW_TO_FAILOVER'
                                   # Controls various backend behavior
                                   # ALLOW_TO_FAILOVER or
DISALLOW_TO_FAILOVER
#backend_hostname1 = 'host2'
#backend_port1 = 5433
#backend_weight1 = 1
#backend_data_directory1 = '/data1'
#backend_flag1 = 'ALLOW_TO_FAILOVER'

# - Authentication -

enable_pool_hba = off
                                   # Use pool_hba.conf for client
authentication
pool_passwd = 'pool_passwd'
                                   # File name of pool_passwd for md5
authentication.
                                   # "" disables pool_passwd.
                                   # (change requires restart)
authentication_timeout = 60
                                   # Delay in seconds to complete client
authentication
                                   # 0 means no timeout.

# - SSL Connections -

ssl = off
                                   # Enable SSL support
                                   # (change requires restart)
#ssl_key = './server.key'
                                   # Path to the SSL private key file
                                   # (change requires restart)
#ssl_cert = './server.cert'
                                   # Path to the SSL public certificate file
                                   # (change requires restart)
#ssl_ca_cert = ''
                                   # Path to a single PEM format file
                                   # containing CA root certificate(s)
                                   # (change requires restart)
#ssl_ca_cert_dir = ''
                                   # Directory containing CA root
certificate(s)
                                   # (change requires restart)


#------------------------------------------------------------------------------
# POOLS
#------------------------------------------------------------------------------

# - Pool size -

num_init_children = 15
                                   # Number of pools
                                  # (change requires restart)
max_pool = 1
                                   # Number of connections per pool
                                   # (change requires restart)

# - Life time -

child_life_time = 120 # was 300
                                   # Pool exits after being idle for this
many seconds
child_max_connections = 0
                                   # Pool exits after receiving that many
connections
                                   # 0 means no exit
connection_life_time = 0 # was 0
                                   # Connection to backend closes after
being idle for this many seconds
                                   # 0 means no close
client_idle_limit = 0 # was 0
                                   # Client is disconnected after being
idle for that many seconds
                                   # (even inside an explicit transactions!)
                                   # 0 means no disconnection


#------------------------------------------------------------------------------
# LOGS
#------------------------------------------------------------------------------

# - Where to log -

log_destination = 'stderr'
                                   # Where to log
                                   # Valid values are combinations of
stderr,
                                   # and syslog. Default to stderr.

# - What to log -

print_timestamp = on
                                   # Print timestamp on each line
                                   # (change requires restart)

log_connections = on
                                   # Log connections
log_hostname = off
                                   # Hostname will be shown in ps status
                                   # and in logs if connections are logged
log_statement = off
                                   # Log all statements
log_per_node_statement = off
                                   # Log all statements
                                   # with node and backend informations
log_standby_delay = 'none'
                                   # Log standby delay
                                   # Valid values are combinations of
always,
                                   # if_over_threshold, none

# - Syslog specific -

syslog_facility = 'LOCAL0'
                                   # Syslog local facility. Default to
LOCAL0
syslog_ident = 'pgpool'
                                   # Syslog program identification string
                                   # Default to 'pgpool'

# - Debug -

debug_level = 2
                                   # Debug message verbosity level
                                   # 0 means no message, 1 or more mean
verbose


#------------------------------------------------------------------------------
# FILE LOCATIONS
#------------------------------------------------------------------------------

pid_file_name = '/var/run/pgpool-II-93/pgpool.pid'
                                   # PID file name
                                   # (change requires restart)
logdir = '/var/log/pgpool-II'
                                   # Directory of pgPool status file
                                   # (change requires restart)


#------------------------------------------------------------------------------
# CONNECTION POOLING
#------------------------------------------------------------------------------

#connection_cache = off
connection_cache = on
                                   # Activate connection pools
                                   # (change requires restart)

                                   # Semicolon separated list of queries
                                   # to be issued at the end of a session
                                   # The default is for 8.3 and later
reset_query_list = 'ABORT; DISCARD ALL'
                                   # The following one is for 8.2 and before
#reset_query_list = 'ABORT; RESET ALL; SET SESSION AUTHORIZATION DEFAULT'


#------------------------------------------------------------------------------
# REPLICATION MODE
#------------------------------------------------------------------------------

replication_mode = off
                                   # Activate replication mode
                                   # (change requires restart)
replicate_select = off
                                   # Replicate SELECT statements
                                   # when in replication or parallel mode
                                   # replicate_select is higher priority
than
                                   # load_balance_mode.

insert_lock = on
                                   # Automatically locks a dummy row or a
table
                                   # with INSERT statements to keep SERIAL
data
                                   # consistency
                                   # Without SERIAL, no lock will be issued
lobj_lock_table = ''
                                   # When rewriting lo_creat command in
                                   # replication mode, specify table name to
                                   # lock

# - Degenerate handling -

replication_stop_on_mismatch = off
                                   # On disagreement with the packet kind
                                   # sent from backend, degenerate the node
                                   # which is most likely "minority"
                                   # If off, just force to exit this session

failover_if_affected_tuples_mismatch = off
                                   # On disagreement with the number of
affected
                                   # tuples in UPDATE/DELETE queries, then
                                   # degenerate the node which is most
likely
                                   # "minority".
                                   # If off, just abort the transaction to
                                   # keep the consistency


#------------------------------------------------------------------------------
# LOAD BALANCING MODE
#------------------------------------------------------------------------------

load_balance_mode = off
                                   # Activate load balancing mode
                                   # (change requires restart)
ignore_leading_white_space = on
                                   # Ignore leading white spaces of each
query
white_function_list = ''
                                   # Comma separated list of function names
                                   # that don't write to database
                                   # Regexp are accepted
black_function_list = 'nextval,setval'
                                   # Comma separated list of function names
                                   # that write to database
                                   # Regexp are accepted


#------------------------------------------------------------------------------
# MASTER/SLAVE MODE
#------------------------------------------------------------------------------

master_slave_mode = off
                                   # Activate master/slave mode
                                   # (change requires restart)
master_slave_sub_mode = 'slony'
                                   # Master/slave sub mode
                                   # Valid values are combinations slony or
                                   # stream. Default is slony.
                                   # (change requires restart)

# - Streaming -

sr_check_period = 0
                                   # Streaming replication check period
                                   # Disabled (0) by default
sr_check_user = 'webserver'
                                   # Streaming replication check user
                                   # This is necessary even if you disable
                                   # streaming replication delay check with
                                   # sr_check_period = 0
sr_check_password = ''
                                   # Password for streaming replication
check user
delay_threshold = 0
                                   # Threshold before not dispatching query
to standby node
                                   # Unit is in bytes
                                   # Disabled (0) by default

# - Special commands -

follow_master_command = ''
                                   # Executes this command after master
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
                                   #   %r = new master port number
                                   #   %R = new master database cluster path
                                   #   %% = '%' character


#------------------------------------------------------------------------------
# PARALLEL MODE
#------------------------------------------------------------------------------

parallel_mode = off
                                   # Activates parallel query mode
                                   # (change requires restart)
pgpool2_hostname = ''
                                   # Set pgpool2 hostname
                                   # (change requires restart)

# - System DB info -

system_db_hostname  = 'localhost'
                                   # (change requires restart)
system_db_port = 5432
                                   # (change requires restart)
system_db_dbname = 'pgpool'
                                   # (change requires restart)
system_db_schema = 'pgpool_catalog'
                                   # (change requires restart)
system_db_user = 'pgpool'
                                   # (change requires restart)
system_db_password = ''
                                   # (change requires restart)


#------------------------------------------------------------------------------
# HEALTH CHECK
#------------------------------------------------------------------------------

health_check_period = 10
                                   # Health check period
                                   # Disabled (0) by default
health_check_timeout = 10
                                   # Health check timeout
                                   # 0 means no timeout
health_check_user = 'webserver'
                                   # Health check user
health_check_password = ''
                                   # Password for health check user
health_check_max_retries = 30
                                   # Maximum number of times to retry a
failed health check before giving up.
health_check_retry_delay = 1
                                   # Amount of time to wait (in seconds)
between retries.


#------------------------------------------------------------------------------
# FAILOVER AND FAILBACK
#------------------------------------------------------------------------------

failover_command = ''
                                   # Executes this command at 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
                                   #   %r = new master port number
                                   #   %R = new master database cluster path
                                   #   %% = '%' character
failback_command = ''
                                   # Executes this command at 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
                                   #   %r = new master port number
                                   #   %R = new master database cluster path
                                   #   %% = '%' character




fail_over_on_backend_error = on
                                   # Initiates failover when
reading/writing to the
                                   # backend communication socket fails
                                   # If set to off, pgpool will report an
                                   # error and disconnect the session.

search_primary_node_timeout = 0
                                   # Timeout in seconds to search for the
                                   # primary node when a failover occurs.
                                   # 0 means no timeout, keep searching
                                   # for a primary node forever.

#------------------------------------------------------------------------------
# ONLINE RECOVERY
#------------------------------------------------------------------------------

recovery_user = 'webserver'
                                   # Online recovery user
recovery_password = ''
                                   # Online recovery password
recovery_1st_stage_command = ''
                                   # Executes a command in first stage
recovery_2nd_stage_command = ''
                                   # Executes a command in second stage
recovery_timeout = 90
                                   # Timeout in seconds to wait for the
                                   # recovering node's postmaster to start
up
                                   # 0 means no wait
client_idle_limit_in_recovery = 0
                                   # Client is disconnected after being idle
                                   # for that many seconds in the second
stage
                                   # of online recovery
                                   # 0 means no disconnection
                                   # -1 means immediate disconnection


#------------------------------------------------------------------------------
# WATCHDOG
#------------------------------------------------------------------------------

# - Enabling -

use_watchdog = off
                                    # Activates watchdog
                                    # (change requires restart)

# -Connection to up stream servers -

trusted_servers = ''
                                    # trusted server list which are used
                                    # to confirm network connection
                                    # (hostA,hostB,hostC,...)
                                    # (change requires restart)
ping_path = '/bin'
                                    # ping command path
                                    # (change requires restart)

# - Watchdog communication Settings -

wd_hostname = ''
                                    # Host name or IP address of this
watchdog
                                    # (change requires restart)
wd_port = 9000
                                    # port number for watchdog service
                                    # (change requires restart)
wd_authkey = ''
                                    # Authentication key for watchdog
communication
                                    # (change requires restart)

# - Virtual IP control Setting -

delegate_IP = ''
                                    # delegate IP address
                                    # If this is empty, virtual IP never
bring up.
                                    # (change requires restart)
ifconfig_path = '/sbin'
                                    # ifconfig command path
                                    # (change requires restart)
if_up_cmd = 'ifconfig eth0:0 inet $_IP_$ netmask 255.255.255.0'
                                    # startup delegate IP command
                                    # (change requires restart)
if_down_cmd = 'ifconfig eth0:0 down'
                                    # shutdown delegate IP command
                                    # (change requires restart)

arping_path = '/usr/sbin'           # arping command path
                                    # (change requires restart)

arping_cmd = 'arping -U $_IP_$ -w 1'
                                    # arping command
                                    # (change requires restart)

# - Behaivor on escalation Setting -

clear_memqcache_on_escalation = on
                                    # Clear all the query cache on shared
memory
                                    # when standby pgpool escalate to
active pgpool
                                    # (= virtual IP holder).
                                    # This should be off if client connects
to pgpool
                                    # not using virtual IP.
                                    # (change requires restart)
wd_escalation_command = ''
                                    # Executes this command at escalation
on new active pgpool.
                                    # (change requires restart)

# - Lifecheck Setting -

# -- common --

wd_lifecheck_method = 'heartbeat'
                                    # Method of watchdog lifecheck
('heartbeat' or 'query')
                                    # (change requires restart)
wd_interval = 10
                                    # lifecheck interval (sec) > 0
                                    # (change requires restart)

# -- heartbeat mode --

wd_heartbeat_port = 9694
                                    # Port number for receiving heartbeat
signal
                                    # (change requires restart)
wd_heartbeat_keepalive = 2
                                    # Interval time of sending heartbeat
signal (sec)
                                    # (change requires restart)
wd_heartbeat_deadtime = 30
                                    # Deadtime interval for heartbeat
signal (sec)
                                    # (change requires restart)
heartbeat_destination0 = 'host0_ip1'
                                    # Host name or IP address of
destination 0
                                    # for sending heartbeat signal.
                                    # (change requires restart)
heartbeat_destination_port0 = 9694
                                    # Port number of destination 0 for
sending
                                    # heartbeat signal. Usually this is the
                                    # same as wd_heartbeat_port.
                                    # (change requires restart)
heartbeat_device0 = ''
                                    # Name of NIC device (such like 'eth0')
                                    # used for sending/receiving heartbeat
                                    # signal to/from destination 0.
                                    # This works only when this is not empty
                                    # and pgpool has root privilege.
                                    # (change requires restart)

#heartbeat_destination1 = 'host0_ip2'
#heartbeat_destination_port1 = 9694
#heartbeat_device1 = ''

# -- query mode --

wd_life_point = 3
                                    # lifecheck retry times
                                    # (change requires restart)
wd_lifecheck_query = 'SELECT 1'
                                    # lifecheck query to pgpool from
watchdog
                                    # (change requires restart)
wd_lifecheck_dbname = 'template1'
                                    # Database name connected for lifecheck
                                    # (change requires restart)
wd_lifecheck_user = 'nobody'
                                    # watchdog user monitoring pgpools in
lifecheck
                                    # (change requires restart)
wd_lifecheck_password = ''
                                    # Password for watchdog user in
lifecheck
                                    # (change requires restart)

# - Other pgpool Connection Settings -

#other_pgpool_hostname0 = 'host0'
                                    # Host name or IP address to connect to
for other pgpool 0
                                    # (change requires restart)
#other_pgpool_port0 = 5432
                                    # Port number for othet pgpool 0
                                    # (change requires restart)
#other_wd_port0 = 9000
                                    # Port number for othet watchdog 0
                                    # (change requires restart)
#other_pgpool_hostname1 = 'host1'
#other_pgpool_port1 = 5432
#other_wd_port1 = 9000


#------------------------------------------------------------------------------
# OTHERS
#------------------------------------------------------------------------------
relcache_expire = 0
                                   # Life time of relation cache in seconds.
                                   # 0 means no cache expiration(the
default).
                                   # The relation cache is used for cache
the
                                   # query result against PostgreSQL system
                                   # catalog to obtain various information
                                   # including table structures or if it's a
                                   # temporary table or not. The cache is
                                   # maintained in a pgpool child local
memory
                                   # and being kept as long as it survives.
                                   # If someone modify the table by using
                                   # ALTER TABLE or some such, the relcache
is
                                   # not consistent anymore.
                                   # For this purpose, cache_expiration
                                   # controls the life time of the cache.

relcache_size = 256
                                   # Number of relation cache
                                   # entry. If you see frequently:
                                   # "pool_search_relcache: cache
replacement happend"
                                   # in the pgpool log, you might want to
increate this number.

check_temp_table = on
                                   # If on, enable temporary table check in
SELECT statements.
                                   # This initiates queries against system
catalog of primary/master
                                   # thus increases load of master.
                                   # If you are absolutely sure that your
system never uses temporary tables
                                   # and you want to save access to
primary/master, you could turn this off.
                                   # Default is on.


#------------------------------------------------------------------------------
# ON MEMORY QUERY MEMORY CACHE
#------------------------------------------------------------------------------
memory_cache_enabled = off
                                   # If on, use the memory cache
functionality, off by default
memqcache_method = 'shmem'
                                   # Cache storage method. either
'shmem'(shared memory) or
                                   # 'memcached'. 'shmem' by default
                                   # (change requires restart)
memqcache_memcached_host = 'localhost'
                                   # Memcached host name or IP address.
Mandatory if
                                   # memqcache_method = 'memcached'.
                                   # Defaults to localhost.
                                   # (change requires restart)
memqcache_memcached_port = 11211
                                   # Memcached port number. Mondatory if
memqcache_method = 'memcached'.
                                   # Defaults to 11211.
                                   # (change requires restart)
memqcache_total_size = 67108864
                                   # Total memory size in bytes for storing
memory cache.
                                   # Mandatory if memqcache_method =
'shmem'.
                                   # Defaults to 64MB.
                                   # (change requires restart)
memqcache_max_num_cache = 1000000
                                   # Total number of cache entries.
Mandatory
                                   # if memqcache_method = 'shmem'.
                                   # Each cache entry consumes 48 bytes on
shared memory.
                                   # Defaults to 1,000,000(45.8MB).
                                   # (change requires restart)
memqcache_expire = 0
                                   # Memory cache entry life time specified
in seconds.
                                   # 0 means infinite life time. 0 by
default.
                                   # (change requires restart)
memqcache_auto_cache_invalidation = on
                                   # If on, invalidation of query cache is
triggered by corresponding
                                   # DDL/DML/DCL(and memqcache_expire).  If
off, it is only triggered
                                   # by memqcache_expire.  on by default.
                                   # (change requires restart)
memqcache_maxcache = 409600
                                   # Maximum SELECT result size in bytes.
                                   # Must be smaller than
memqcache_cache_block_size. Defaults to 400KB.
                                   # (change requires restart)
memqcache_cache_block_size = 1048576
                                   # Cache block size in bytes. Mandatory
if memqcache_method = 'shmem'.
                                   # Defaults to 1MB.
                                   # (change requires restart)
memqcache_oiddir = '/var/log/pgpool/oiddir'
                                      # Temporary work directory to record
table oids
                                   # (change requires restart)
white_memqcache_table_list = ''
                                   # Comma separated list of table names to
memcache
                                   # that don't write to database
                                   # Regexp are accepted
black_memqcache_table_list = ''
                                   # Comma separated list of table names
not to memcache
                                   # that don't write to database
                                   # Regexp are accepted




















-- 
[image: FBS Logo]

*Travis Kirstine*, Web Development Supervisor
*t *905‑477‑3600* x *301 | *m *647‑534‑4798 |
tkirstine at firstbasesolution.com

*First Base Solutions Inc.*
140 Renfrew Drive, Suite 100 | Markham | Ontario | L3R 6B3
*t* 905‑477‑3600 | *f* 905‑477‑0892 | www.firstbasesolutions.com
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