Query_Start: '||casewhen query_start is nullthen'NULL'elsequery_start::text end||' , Xact_Elapse: '||casewhen (now()-xact_start) is nullthen'NULL'else(now()-xact_start)::text end||' , Query_Elapse: '||casewhen (now()-query_start) is nullthen'NULL'else(now...
\p show the contents of the query buffer \r reset (clear) the query buffer \s [FILE] display history or save it to file \w FILE write query buffer to file Input/Output \copy ... perform SQL COPY with data stream to the client host \echo [STRING] write string to standard output \...
#linux连接数进程pid,用户名,应用名称,client登录时间,运行时间,后台是否等待一个lock,当前状态,sql语句 select pid,usename ,application_name,backend_start,current_timestamp - least(query_start,xact_start) as runtime,waiting,state,query from pg_stat_activity; #等待事件,根据阻塞的语句的会话PID做相应处...
-- Show how long each query takes to execute \timing -- Use best available output format \x auto \set VERBOSITY verbose \set HISTFILE ~/.psql_history- :DBNAME \set HISTCONTROL ignoredups \set COMP_KEYWORD_CASE upper \unset QUIET 3. 通过pg_stat_statements来查看需要进行索引的地方 pg_stat_...
--show-script=NAME 显示内置脚本代码,然后退出 --verbose-errors 打印所有错误的消息 Common options: -d, --debug 打印调试输出 -h, --host=HOSTNAME 数据库服务器主机或套接字目录 -p, --port=PORT 数据库服务器端口号 -U, --username=USERNAME 以指定的数据库用户身份连接 ...
-- Show how long each query takes to execute \timing -- Use best available output format \x auto \set VERBOSITY verbose \set HISTFILE ~/.psql_history- :DBNAME \set HISTCONTROL ignoredups \set COMP_KEYWORD_CASE upper \unset QUIET
pg_stat_kcacheandpg_profilefor collecting and displaying information in a human-readable way.pgpro_statsandpgpro_pwrprovide additional data related to waits history and query execution plans. However, they can’t show parameters, so consider usingauto_explainmodule for that. Now let’s have a ...
The result of these functions is a textual representation of the query tree where leaves are GIN search entries. Following examples show different results of query optimization by different opclasses: # SELECT gin_debug_query_path_value('x = 1 AND (*.y = 1 OR y = 2)'); gin_debug_quer...
Query JSONB in PostgreSQLA Guide to pg_restore (and pg_restore Example)Handling Large Objects in PostgresPostgreSQL Performance Tuning: Designing and Implementing Your Database SchemaPostgreSQL Performance Tuning: Key ParametersHow to Reduce Bloat in Large PostgreSQL TablesDetermining the Optimal Postgres ...
Today, we'll talk about optimizing with the Postgres deterministic query planner, have a look at using extended statistics, and show how to tune Join collapse times. Share this episode: Click here to share this episode on twitter, or sign up for our newsletter and check out the newsletter ...