I changed PostgreSQL cluster configuration to log ALL statements and its duration, and it work correct, but periodically I see records like this:
2020-12-08 09:31:42.175 +05 [19041:app_name] LOG: 00000: duration: 0.046 ms
2020-12-08 09:31:42.175 +05 [19041:app_name] LOCATION: exec_execute_message, postgres.c:2086
What could it be? log_line_prefix = '%m [%p:%a] '
Also, it's standby node and replicates primary.
You are seeing output from log_duration. That just emits the duration without the statement and is somewhat useless.
Set log_duration = off, log_statement = 'none' and log_min_duration_statement = 0, and you will get all statements logged along with their duration, which is usually the most useful setting.
Related
Trying to achieve sync streaming to barman server and i need to add an entry to postgresql.conf for this parameter, which already has an entry and tried a few variations but does not work. Any ideas? Also tried '&&' but in vain
synchronous_standby_names='ANY 1 (*)',barman-wal-archive
2022-06-10 16:50:54.272 BST [11241-43] # app= LOG: syntax error in
file "/var/lib/pgsql/13/data/postgresql.conf" line 22, near token ","
2022-06-10 16:50:54.272 BST [11241-44] # app= LOG: configuration file
"/var/lib/pgsql/13/data/postgresql.conf" contains errors; no changes
were applied
The syntax you are using is not valid, and you won't be able to specify that Barman should be kept synchronous and any one of the others. The best you can do is
synchronous_standby_names = 'FIRST 2 ("barman-wal-archive", standby1, standby2, standby3)'
(You have to double quote all names that are not standard SQL identifiers, for example if they contain -.)
Then PostgreSQL will always keep Barman synchronized, as well as the first available standby server. But that won't have transactions fail if Barman is not available, which seems to be what you want.
Keep just
synchronous_standby_names='ANY 1 (*)'
and set
synchronous_commit = on
or
synchronous_commit = remote_write
I have a simple process that is reading logical replication messages from postgres. This process runs every second and generates a lot of messages in the postgres logs like:
2021-02-15 20:35:11.032 UTC [35] STATEMENT: SELECT * FROM pg_logical_slot_get_changes('lazy_cloud', NULL, NULL);
2021-02-15 20:35:11.032 UTC [35] LOG: logical decoding found consistent point at 0/167C618
2021-02-15 20:35:11.032 UTC [35] DETAIL: There are no running transactions.
I've configured logging with the following settings:
log_min_messages=ERROR
log_statement=none
log_replication_commands=0
But, the logical replication logs are still produced.
Is there a setting to disable these messages? I can use sed or something like that, but would prefer a built in solution.
There is no way to disable that message short of setting
log_min_messages = fatal
in postgresql.conf, but that is not a smart idea, because then you'd miss out on all error messages in the log file and essentially disable logging.
I have a requirement to capture all the database errors arrived while calling a procedure/function, inserting a record in a table or deleting.
Its something like whenever any errors occurs in Postgres database, that needs to be captured.
Can any one suggest me some like or any small example stating that.
Till now I was using:
Raise notice or Raise exception to raise it on console log.
But I want to capture these and store in a table(some error log table).
I have set below parameters in postgresql.conf:
log_destination = 'stderr','csvlog','syslog','eventlog'
logging_collector = on
log_filename = 'tst_log_err-%a.log'
client_min_messages = debug5
log_min_messages = debug5
log_min_error_statement = debug5
log_min_duration_statement = 300ms
log_checkpoints = on
log_line_prefix = '%t [%p]: [%l-1] user=%u,db=%d,app=%a,client=%h '
log_lock_waits = on
log_statement = 'all'
and then created table "postgres_log" with all the specified details.
And then tried stopping and restarting local postgresql server but I got failed to restart
Kindly suggest.
https://www.postgresql.org/docs/current/static/runtime-config-logging.html
set logging_collector to on, log_destination to stderr,csvlog, log_min_error_statement to NOTICE (if you want higher then NOTICE to be saved in logs). Eg log_min_error_statement = NOTICE this will capture all you rase NOTICE, raise WARNING and so on; log_min_error_statement = WARNING this will capture all you rase WARNING, raise error and so on.
then, follow
https://www.postgresql.org/docs/current/static/runtime-config-logging.html#RUNTIME-CONFIG-LOGGING-CSVLOG
you can setup cron to load it periodically...
My postgres crashes for long query. It's on Debian 7 64bit, and postgresql-9.3.2. I uses all default configuration. Could anyone suggest what problem it could be? thanks.
--part1:
SELECT r1.f2 as b, r1.e as l
FROM r r8,r r7,r r6,r r5,r r4,r r3,r r2,r r1
WHERE
r1.f2=r2.f1 AND
r1.f2=r3.f1 AND
r1.f2=r4.f1 AND
r1.f1=r5.f2 AND
r1.f1=r8.f1 AND
r2.f1=r3.f1 AND
r2.f1=r4.f1 AND
r2.f2=r6.f2 AND
r2.f2=r7.f1 AND
r3.f1=r4.f1 AND
r3.f2=r7.f2 AND
r3.f2=r8.f2 AND
r4.f2=r5.f1 AND
r4.f2=r6.f1 AND
r5.f1=r6.f1 AND
r5.f2=r8.f1 AND
r6.f2=r7.f1 AND
r7.f2=r8.f2 AND
r1.d=1 AND
r2.d=1 AND
r3.d=2 AND
r4.d=2 AND
r5.d=2 AND
r6.d=2 AND
r7.d=2 AND
r8.d=2
-- part2
group by r1.f2,r1.e
having
calc_empty_a() AND
calc_empty_b();
In the query, calc_empty_a() are just empty boolean functions (return true), so they should have no problem.
If I run the query in client, the server crashes. There is nothing useful information in the log (please refer to the error info at end of the post).
If I run the part 1 query, the query works well.
If I first run the part 1 query, then I run the whole query, it works well.
If I change the query, reduce the r numbers, for example, there are only r1 to r6 FROM tables, delete the predicates with r8, r7, but keep the part 2's GROUP BY and HAVING clause. The query still works well.
If the query have one empty function in HVING clause, the query also works well, but will crash if there are two functions.
The following query works well
SELECT r1.f2 as b, r1.f1 as a , r1.e as e
FROM r r8,r r7,r r6,r r5,r r4,r r3,r r2,r r1
WHERE
r1.f2=r2.f1 AND
r1.f2=r3.f1 AND
r1.f2=r4.f1 AND
r1.f1=r5.f2 AND
r1.f1=r8.f1 AND
r2.f1=r3.f1 AND
r2.f1=r4.f1 AND
r2.f2=r6.f2 AND
r2.f2=r7.f1 AND
r3.f1=r4.f1 AND
r3.f2=r7.f2 AND
r3.f2=r8.f2 AND
r4.f2=r5.f1 AND
r4.f2=r6.f1 AND
r5.f1=r6.f1 AND
r5.f2=r8.f1 AND
r6.f2=r7.f1 AND
r7.f2=r8.f2
group by r1.f2,r1.f1, r1.e
having
calc_empty_a() AND
calc_empty_a();
I have set the os to use strict overcommit mode:
sysctl -w vm.overcommit_memory=2
Error info:
at client
The connection to the server was lost. Attempting reset: Succeeded.
at server
LOG: terminating any other active server processes
WARNING: terminating connection because of crash of another server process
DETAIL: The postmaster has commanded this server process to roll back the current transaction and exit, because another server process exited abnormally and possibly corrupted shared memory.
HINT: In a moment you should be able to reconnect to the database and repeat your command.
WARNING: terminating connection because of crash of another server process
DETAIL: The postmaster has commanded this server process to roll back the current transaction and exit, because another server process exited abnormally and possibly corrupted shared memory.
HINT: In a moment you should be able to reconnect to the database and repeat your command.
LOG: all server processes terminated; reinitializing
LOG: database system was interrupted; last known up at 2014-11-07 16:47:03 GMT
LOG: database system was not properly shut down; automatic recovery in progress
LOG: redo starts at 0/2126C98
LOG: record with zero length at 0/21A9D98
LOG: redo done at 0/21A9D68
LOG: last completed transaction was at log time 2014-11-07 16:47:26.844406+00
LOG: autovacuum launcher started
LOG: database system is ready to accept connections
I want to log each query execution time which is run in a day.
For example like this,
2012-10-01 13:23:38 STATEMENT: SELECT * FROM pg_stat_database runtime:265 ms.
Please give me some guideline.
If you set
log_min_duration_statement = 0
log_statement = all
in your postgresql.conf, then you will see all statements being logged into the Postgres logfile.
If you enable
log_duration
that will also print the time taken for each statement. This is off by default.
Using the log_statement parameter you can control which type of statement you want to log (DDL, DML, ...)
This will produce an output like this in the logfile:
2012-10-01 13:00:43 CEST postgres LOG: statement: select count(*) from pg_class;
2012-10-01 13:00:43 CEST postgres LOG: duration: 47.000 ms
More details in the manual:
http://www.postgresql.org/docs/8.4/static/runtime-config-logging.html#RUNTIME-CONFIG-LOGGING-WHEN
http://www.postgresql.org/docs/8.4/static/runtime-config-logging.html#RUNTIME-CONFIG-LOGGING-WHAT
If you want a daily list, you probably want to configure the logfile to rotate on a daily basis. Again this is described in the manual.
I believe OP was actually asking for execution duration, not the timestamp.
To include the duration in the log output, open pgsql/<version>/data/postgresql.conf, find the line that reads
#log_duration = off
and change it to
log_duration = on
If you can't find the given parameter, just add it in a new line in the file.
After saving the changes, restart the postgresql service, or just invoke
pg_ctl reload -D <path to the directory of postgresql.conf>
e.g.
pg_ctl reload -D /var/lib/pgsql/9.2/data/
to reload the configuration.
I think a better option is to enable pg_stat_statements by enabling the PG stats extension. This will help you to find the query execution time for each query nicely recorded in a view