输入和输出选项: -a, --echo-all 显示所有来自于脚本的输入 -b, --echo-errors 回显失败的命令 -e, --echo-queries 显示发送给服务器的命令 -E, --echo-hidden 显示内部命令产生的查询 -L, --log-file=文件名 将会话日志写入文件 -n, --no-readline 禁用增强命令行编辑功能(readline) -o, --output...
# These settings are ignored on a master server. #hot_standby = on # "off" disallows queries during recovery # (change requires restart) 1. 2. 3. 4. 5. 6. hot_standby:是否开启热备份 # - Where to Log - #log_destination = 'stderr' # Valid values are combinations of # stderr, ...
log_line_prefix,%m [%p],Controls information prefixed to each log line. log_lock_waits,off,Logs long lock waits. log_min_duration_statement,1s,Sets the minimum execution time above which statements will be logged. log_min_error_statement,error,Causes all statements generating error at or abov...
# log_min_duration_statement to be logged. # 1.0 logs all such statements, 0.0 never logs.#log_transaction_sample_rate = 0.0 # Fraction of transactions whose statements # are logged regardless of their duration. 1.0 logs all # statements from all transactions, 0.0 never logs.# - What to ...
The trouble is, the number of possible plans grows exponentially as the number of joins increases, and sifting through all the plans one by one is impossible even for relatively simple queries. Therefore, dynamic programming and heuristics are used to limit the scope of search. This allows to ...
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log_min_error_statement Causes all statements generating error at or above this level to be logged. 使所有语句在该级别之上或高于该级别生成错误。 log_min_messages Sets the message levels that are logged. 设置记录的消息级别。 log_parser_stats Writes parser performance statistics to the server log...
Which of these queries is better to use is hard to say. Normally I make that decision based on whether there's more useful information I also want to use inside of pg_class or inside of pg_stat_user_tables. For basic counting purposes just to see how big things are in general, either...
Thelog_min_duration_statementsetting enables you to limit the volume of statements that are logged. If you set log_min_duration_statement to 900ms, for example, it will only log the queries that exceed this time. Of course, this is only useful as a volume control if the ...
In PostgreSQL 11, such queries can still execute in parallel when called within commandsCREATE TABLE AS,SELECT INTOandCREATE MATERIALIZED VIEW(and in version 14 and higher also withinREFRESH MATERIALIZED VIEW). AllINSERToperations will still execute sequentially even in these cases, however. ...