postgresql开启pg_log日志详细步骤及参数说明

vim postgresql.conf

log_destination = ‘csvlog'
logging_collector = on
log_directory = ‘pg_log'
log_filename = ‘postgresql-%Y-%m-%d_%H%M%S.log'
log_rotation_age = 1d
log_rotation_size = 100MB
log_min_messages = debug1
# 记录执行慢的SQL
log_min_duration_statement = 60
log_checkpoints = on
log_connections = on
log_disconnections = on
log_duration = on
log_line_prefix = ‘%m'
# 监控数据库中长时间的锁
log_lock_waits = on
# 记录DDL操作
log_statement = ‘all'

[root@localhost data]# cd pg_log
[root@localhost pg_log]# ls
postgresql-2023-07-27_22.csv  postgresql-2023-07-27_22.log  postgresql-2023-07-28_14.csv  postgresql-2023-07-28_14.log

CREATE TABLE postgres_log
(
log_time timestamp(3) with time zone,user_name text,
database_name text,
process_id integer,
connection_from text,
session_id text,
session_line_num bigint,
command_tag text,
session_start_time timestamp with time zone,
virtual_transaction_id text,
transaction_id bigint,
error_severity text,
sql_state_code text,
message text,
detail text,
hint text,internal_query text,
internal_query_pos integer,
context text,query text,
query_pos integer,
location text,
application_name text,
backend_type text,
leader_pid integer,
query_id bigint,
PRIMARY KEY (session_id, session_line_num)
) 

DO $func$BEGIN  EXECUTE $$ COPY public.postgres_log from '/opt/postgresql/data/pg_log/postgresql-$$ || to_char(now(),'YYYY-MM-DD_HH24') || $$.csv'  DELIMITER ',' CSV HEADER;  $$;END;$func$ LANGUAGE plpgsql;

SELECT * from postgres_log