[pgpool-general: 626] Re: exclude EXPLAIN from the pgpool.

[Tatsuo Ishii]

Even trivial explain like "EXPLAIN SELECT 1" causes errors?
--
Tatsuo Ishii
SRA OSS, Inc. Japan
English: http://www.sraoss.co.jp/index_en.php
Japanese: http://www.sraoss.co.jp

> Hi,
> I would like to know if I can exclude the command EXPLAIN from the pgpool.
> It generates a lot of errors:
> 
> 2012-06-13 09:35:11 ERROR: pid 15204: read_kind_from_backend: 1 th kind C
> does not match with master or majority connection kind D
> 2012-06-13 09:35:11 ERROR: pid 15204: kind mismatch among backends.
> Possible last query was: "EXPLAIN SELECT ...... " kind details are: 0[D]
> 1[C]
> 2012-06-13 09:35:11 LOG:   pid 15204: do_child: exits with status 1 due to
> error
> 
> pool-II-3.1.3
> PostgreSQL 9.1.2
> both Server same Hardware.
> 
> Pgpool configuration:
> 
> listen_addresses = '*'
> port = 5432
> socket_dir = '/var/run/postgresql'
> pcp_port = 9898
> pcp_socket_dir = '/tmp'
> backend_hostname0 = 'localhost'
> backend_port0 = 5434
> backend_weight0 = 1
> backend_data_directory0 = '/var/lib/postgresql/9.1/main'
> backend_flag0 = 'ALLOW_TO_FAILOVER'
> backend_hostname1 = '172.16.0.1'
> backend_port1 = 5434 #doveva essere a 5434
> backend_weight1 = 1
> backend_data_directory1 = '/var/lib/postgresql/9.1/main'
> backend_flag1 = 'ALLOW_TO_FAILOVER'
> enable_pool_hba = off
> authentication_timeout = 60
> # - SSL Connections -
> num_init_children = 32
> max_pool = 10
> child_life_time = 300
> child_max_connections = 0
> connection_life_time = 0
> client_idle_limit = 0
> log_destination = 'stderr'
> print_timestamp = on
> log_connections = off
> log_hostname = on
> log_statement = off
> log_per_node_statement = off
> log_standby_delay = 'none'
> syslog_facility = 'LOCAL0'
> syslog_ident = 'pgpool'
> debug_level = 0
> pid_file_name = '/var/run/pgpool/pgpool.pid'
> logdir = '/tmp'
> connection_cache = on
> reset_query_list = 'ABORT; DISCARD ALL'
> replication_mode = on
> replicate_select = off
> insert_lock = on
> lobj_lock_table = ''
> replication_stop_on_mismatch = off
> failover_if_affected_tuples_mismatch = off
> load_balance_mode =  off
> ignore_leading_white_space = on
> white_function_list = ''
> black_function_list = 'nextval,setval'
> master_slave_mode = off
> sr_check_period = 0
> sr_check_user = 'nobody'
> sr_check_password = ''
> delay_threshold = 0
> follow_master_command = ''
> parallel_mode = off
> enable_query_cache = off
> pgpool2_hostname = 'localhost'
> system_db_hostname  = 'localhost'
> system_db_port = 5434
> system_db_dbname = 'pgpool'
> system_db_schema = 'pgpool_catalog'
> system_db_user = 'pgpool'
> system_db_password = ''
> health_check_period = 0
> health_check_timeout = 20
> health_check_user = 'nobody'
> health_check_password = ''
> 
> ------------------------------------
> 
> The answers about these questions are welcome.
> 
> Best Regards
> 
> Nicolas