Hi,
Remarks on reproducing the problem with Your test data:
1. reproducing not possible within psql command line.
You have to use a sql script:
psql -d test -f a.sql
where a.sql:
-- start of a.sql
select * from t1;
BEGIN;
select * from t2 limit 1;
COMMIT;
select * from t1;
-- end of a.sql
Remarks on reproducing the problem with Your test data:
1. reproducing not possible within psql command line.
You have to use a sql script:
psql -d test -f a.sql
where a.sql:
-- start of a.sql
select * from t1;
BEGIN;
select * from t2 limit 1;
COMMIT;
select * from t1;
-- end of a.sql
2. reproducing was not possible on a single machine with several postgres instances
3. reproducing was possible on two ore more machines over ethernet
4. using the latest cvs tree (from 26.th Dec) the problem has been fixed
Thanks for Your fast bug fix!
-----Tatsuo Ishii <[EMAIL PROTECTED]> wrote: -----
>An: [EMAIL PROTECTED]
>Von: Tatsuo Ishii <[EMAIL PROTECTED]>
>Datum: 22.12.2007 00:43
>Kopie: pgpool-general@pgfoundry.org
>Thema: Re: [Pgpool-general] pgpool-II hanging
>
>Hi,
>
>I could not reproduce your problem here. Can you confirm that my test
>case reproduces the problem on your system?
>
>Here is the test case:
>
>... connect to pgpool
>test=# create table t1(i int);
>CREATE TABLE
>test=# insert into t1 values(1);
>INSERT 0 1
>test=# insert into t1 values(2);
>INSERT 0 1
>test=# insert into t2 values(1);
>ERROR: relation "t2" does not exist
>test=# create table t2(i int);
>CREATE TABLE
>test=# insert into t2 values(1);
>INSERT 0 1
>test=# insert into t2 values(2);
>INSERT 0 1
>disconnect to pgpool
>
>... connect to pgpool again
>test=# SELECT 'DBD::Pg ping test';
> ?column?
>-------------------
> DBD::Pg ping test
>(1 row)
>
>test=# BEGIN;
>BEGIN
>test=# select * from t1;
> i
>---
> 1
> 2
>(2 rows)
>
>test=# COMMIT;
>COMMIT
>test=# select * from t2;
> i
>---
> 1
> 2
>(2 rows)
>
>pgpool.conf:
>
>#
># pgpool-II configuration file sample
># $Header: /cvsroot/pgpool/pgpool-II/pgpool.conf.sample,v 1.15
>2007/10/31 10:45:52 y-asaba Exp $
>
># Host name or IP address to listen on: '*' for all, '' for no TCP/IP
># connections
>listen_addresses = 'localhost'
>
># Port number for pgpool
>port = 9999
>
># 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, but
>strongly not recommended!
>pcp_timeout = 3600
>
># number of pre-forked child process
>num_init_children = 32
>
># Number of connection pools allowed for a child process
>max_pool = 4
>
># 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 = 0
>
># Maximum time in seconds to complete client authentication.
># 0 means no timeout.
>authentication_timeout = 60
>
># Logging directory
>logdir = '/tmp'
>
># Replication mode
>replication_mode = true
>
># Set this to nonzero (in milliseconds) to detect this situation and
># resolve the deadlock by aborting current session.
>replication_timeout = 5000
>
># Load balancing mode, i.e., all SELECTs except in a transaction
>block
># are load balanced. This is ignored if replication_mode is false.
>load_balance_mode = true
>
># if there's a data mismatch between master and secondary
># start degeneration to stop replication mode
>replication_stop_on_mismatch = false
>
># If true, replicate SELECT statement when load balancing is
>disabled.
># If false, it is only sent to the master node.
>replicate_select = false
>
># Semicolon separated list of queries to be issued at the end of a
>session
>reset_query_list = 'RESET ALL; SET SESSION AUTHORIZATION DEFAULT'
>
># If true print timestamp on each log line.
>print_timestamp = true
>
># If true, operate in master/slave mode.
>master_slave_mode = false
>
># If true, cache connection pool.
>connection_cache = true
>
># Health check timeout. 0 means no timeout.
>health_check_timeout = 20
>
># Health check period. 0 means no health check.
>health_check_period = 5
>
># Health check user
>health_check_user = 'nobody'
>
># Execute command by failover.
># special values: %d = node id
># %h = host name
># %p = port number
># %D = database cluster path
># %% = '%' character
>#
>#failover_command = 'ls'
>
># Execute command by failback.
># special values: %d = node id
># %h = host name
># %p = port number
># %D = database cluster path
># %% = '%' character
>#
>#failback_command = 'ls'
>
># If true, automatically lock table with INSERT statements to keep
>SERIAL
># data consistency. 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, incoming connections will be printed to the log.
>log_connections = false
>
># 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 = ''
>
># backend_hostname, backend_port, backend_weight
># here are examples
>
># - HBA -
>
># If true, use pool_hba.conf for client authentication. In pgpool-II
># 1.1, the default value is false. The default value will be true in
># 1.2.
>enable_pool_hba = false
>
># - online recovery -
># online recovery user
>recovery_user = 't-ishii'
>
># online recovery password
>recovery_password = 't-ishii'
>
># execute a command in first stage.
>recovery_1st_stage_command = 'copy_base_backup'
>
># execute a command in second stage.
>recovery_2nd_stage_command = 'pgpool_recovery_pitr'
>replication_strict = true
>failover_command = ''
>failback_command = ''
>backend_hostname0 = ''
>backend_port0 = 5432
>backend_weight0 = 1
>backend_data_directory0 = '/usr/local/pgsql/data'
>backend_hostname1 = ''
>backend_port1 = 5433
>backend_weight1 = 1
>backend_data_directory1 = '/usr/local/pgsql/data.repli'
>
>> Hello,
>>
>> we are testing pgpool-II for data replication in our
>PostgreSQL-Cluster.
>> pgpool is hanging during the combinations of select and
>update/insert
>> statements
>> within a transaction. We have reduced all to the following script:
>>
>> ---- begin sql ---
>> SELECT 'DBD::Pg ping test';
>> BEGIN;
>> select * from sometable;
>> COMMIT
>> select * from anothertable;
>> --- end sql ----
>>
>> pgpool is hanging after the commit-Statement.
>>
>>
>> #---pgpool.conf --------------
>> listen_addresses = '*'
>> port = 5432
>> pcp_port = 9898
>> socket_dir = '/var/run/postgresql'
>> ...
>> replication_mode = true
>> replication_timeout = 5000
>> load_balance_mode = true
>> replicate_select = false
>> replication_stop_on_mismatch = true
>> reset_query_list = 'ABORT; RESET ALL; SET SESSION AUTHORIZATION
>DEFAULT'
>> print_timestamp = true
>> connection_cache = true
>> health_check_timeout = 20
>> health_check_period = 60
>> health_check_user = 'nobody'
>> insert_lock = true
>> ignore_leading_white_space = true
>> ...
>> parallel_mode = false
>> enable_query_cache = false
>> backend_hostname0 = 'dbfs2'
>> backend_port0 = 5435
>> backend_weight0 = 1
>> backend_data_directory0 = '/pgpool/dbfs2'
>> backend_hostname1 = 'dbfs3'
>> backend_port1 = 5435
>> backend_weight1 = 1
>> backend_data_directory1 = '/pgpool/dbfs3'
>> enable_pool_hba = false
>> #--- end pgpool.conf
>>
>> After setting
>> replicate_select = true
>>
>> all is working fine.
>>
>> ----
>> Best Regards / Mit freundlichen Grüßen
>>
>> Dr. R. Rohmfeld
>> IT und Software Development
>>
>> e-mail: [EMAIL PROTECTED]
>>
>
>
3. reproducing was possible on two ore more machines over ethernet
4. using the latest cvs tree (from 26.th Dec) the problem has been fixed
Thanks for Your fast bug fix!
>An: [EMAIL PROTECTED]
>Von: Tatsuo Ishii <[EMAIL PROTECTED]>
>Datum: 22.12.2007 00:43
>Kopie: pgpool-general@pgfoundry.org
>Thema: Re: [Pgpool-general] pgpool-II hanging
>
>Hi,
>
>I could not reproduce your problem here. Can you confirm that my test
>case reproduces the problem on your system?
>
>Here is the test case:
>
>... connect to pgpool
>test=# create table t1(i int);
>CREATE TABLE
>test=# insert into t1 values(1);
>INSERT 0 1
>test=# insert into t1 values(2);
>INSERT 0 1
>test=# insert into t2 values(1);
>ERROR: relation "t2" does not exist
>test=# create table t2(i int);
>CREATE TABLE
>test=# insert into t2 values(1);
>INSERT 0 1
>test=# insert into t2 values(2);
>INSERT 0 1
>disconnect to pgpool
>
>... connect to pgpool again
>test=# SELECT 'DBD::Pg ping test';
> ?column?
>-------------------
> DBD::Pg ping test
>(1 row)
>
>test=# BEGIN;
>BEGIN
>test=# select * from t1;
> i
>---
> 1
> 2
>(2 rows)
>
>test=# COMMIT;
>COMMIT
>test=# select * from t2;
> i
>---
> 1
> 2
>(2 rows)
>
>pgpool.conf:
>
>#
># pgpool-II configuration file sample
># $Header: /cvsroot/pgpool/pgpool-II/pgpool.conf.sample,v 1.15
>2007/10/31 10:45:52 y-asaba Exp $
>
># Host name or IP address to listen on: '*' for all, '' for no TCP/IP
># connections
>listen_addresses = 'localhost'
>
># Port number for pgpool
>port = 9999
>
># 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, but
>strongly not recommended!
>pcp_timeout = 3600
>
># number of pre-forked child process
>num_init_children = 32
>
># Number of connection pools allowed for a child process
>max_pool = 4
>
># 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 = 0
>
># Maximum time in seconds to complete client authentication.
># 0 means no timeout.
>authentication_timeout = 60
>
># Logging directory
>logdir = '/tmp'
>
># Replication mode
>replication_mode = true
>
># Set this to nonzero (in milliseconds) to detect this situation and
># resolve the deadlock by aborting current session.
>replication_timeout = 5000
>
># Load balancing mode, i.e., all SELECTs except in a transaction
>block
># are load balanced. This is ignored if replication_mode is false.
>load_balance_mode = true
>
># if there's a data mismatch between master and secondary
># start degeneration to stop replication mode
>replication_stop_on_mismatch = false
>
># If true, replicate SELECT statement when load balancing is
>disabled.
># If false, it is only sent to the master node.
>replicate_select = false
>
># Semicolon separated list of queries to be issued at the end of a
>session
>reset_query_list = 'RESET ALL; SET SESSION AUTHORIZATION DEFAULT'
>
># If true print timestamp on each log line.
>print_timestamp = true
>
># If true, operate in master/slave mode.
>master_slave_mode = false
>
># If true, cache connection pool.
>connection_cache = true
>
># Health check timeout. 0 means no timeout.
>health_check_timeout = 20
>
># Health check period. 0 means no health check.
>health_check_period = 5
>
># Health check user
>health_check_user = 'nobody'
>
># Execute command by failover.
># special values: %d = node id
># %h = host name
># %p = port number
># %D = database cluster path
># %% = '%' character
>#
>#failover_command = 'ls'
>
># Execute command by failback.
># special values: %d = node id
># %h = host name
># %p = port number
># %D = database cluster path
># %% = '%' character
>#
>#failback_command = 'ls'
>
># If true, automatically lock table with INSERT statements to keep
>SERIAL
># data consistency. 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, incoming connections will be printed to the log.
>log_connections = false
>
># 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 = ''
>
># backend_hostname, backend_port, backend_weight
># here are examples
>
># - HBA -
>
># If true, use pool_hba.conf for client authentication. In pgpool-II
># 1.1, the default value is false. The default value will be true in
># 1.2.
>enable_pool_hba = false
>
># - online recovery -
># online recovery user
>recovery_user = 't-ishii'
>
># online recovery password
>recovery_password = 't-ishii'
>
># execute a command in first stage.
>recovery_1st_stage_command = 'copy_base_backup'
>
># execute a command in second stage.
>recovery_2nd_stage_command = 'pgpool_recovery_pitr'
>replication_strict = true
>failover_command = ''
>failback_command = ''
>backend_hostname0 = ''
>backend_port0 = 5432
>backend_weight0 = 1
>backend_data_directory0 = '/usr/local/pgsql/data'
>backend_hostname1 = ''
>backend_port1 = 5433
>backend_weight1 = 1
>backend_data_directory1 = '/usr/local/pgsql/data.repli'
>
>> Hello,
>>
>> we are testing pgpool-II for data replication in our
>PostgreSQL-Cluster.
>> pgpool is hanging during the combinations of select and
>update/insert
>> statements
>> within a transaction. We have reduced all to the following script:
>>
>> ---- begin sql ---
>> SELECT 'DBD::Pg ping test';
>> BEGIN;
>> select * from sometable;
>> COMMIT
>> select * from anothertable;
>> --- end sql ----
>>
>> pgpool is hanging after the commit-Statement.
>>
>>
>> #---pgpool.conf --------------
>> listen_addresses = '*'
>> port = 5432
>> pcp_port = 9898
>> socket_dir = '/var/run/postgresql'
>> ...
>> replication_mode = true
>> replication_timeout = 5000
>> load_balance_mode = true
>> replicate_select = false
>> replication_stop_on_mismatch = true
>> reset_query_list = 'ABORT; RESET ALL; SET SESSION AUTHORIZATION
>DEFAULT'
>> print_timestamp = true
>> connection_cache = true
>> health_check_timeout = 20
>> health_check_period = 60
>> health_check_user = 'nobody'
>> insert_lock = true
>> ignore_leading_white_space = true
>> ...
>> parallel_mode = false
>> enable_query_cache = false
>> backend_hostname0 = 'dbfs2'
>> backend_port0 = 5435
>> backend_weight0 = 1
>> backend_data_directory0 = '/pgpool/dbfs2'
>> backend_hostname1 = 'dbfs3'
>> backend_port1 = 5435
>> backend_weight1 = 1
>> backend_data_directory1 = '/pgpool/dbfs3'
>> enable_pool_hba = false
>> #--- end pgpool.conf
>>
>> After setting
>> replicate_select = true
>>
>> all is working fine.
>>
>> ----
>> Best Regards / Mit freundlichen Grüßen
>>
>> Dr. R. Rohmfeld
>> IT und Software Development
>>
>> e-mail: [EMAIL PROTECTED]
>>
>
>
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