pgadmin4信息收集语句

-- pgadmin4信息收集语句

    SELECT
   (SELECT sum(tup_inserted) FROM pg_stat_database) AS "Inserts",
   (SELECT sum(tup_updated) FROM pg_stat_database) AS "Updates",
   (SELECT sum(tup_deleted) FROM pg_stat_database) AS "Deletes";
   
   
   
   SELECT
   (SELECT sum(tup_fetched) FROM pg_stat_database) AS "Fetched",
   (SELECT sum(tup_returned) FROM pg_stat_database) AS "Returned";
   -- pg_stat_database的字段tup_returned，tup_fetched含义
   -- https://www.baidu.com/link?url=pXJnSbfNT0snX32YzlPh_Kh3nyYJXCtYFKTzagLbSELOsGs-k9GbTQGpZ97bJdhFO7CQhTMzhXexfOVaIV0AhK&wd=&eqid=e46e187c00059a9c000000045b46ea10
   
   SELECT
   (SELECT sum(xact_commit) + sum(xact_rollback) FROM pg_stat_database) AS "Transactions",
   (SELECT sum(xact_commit) FROM pg_stat_database) AS "Commits",
   (SELECT sum(xact_rollback) FROM pg_stat_database) AS "Rollbacks";
   
   
   SELECT
   (SELECT sum(blks_read) FROM pg_stat_database) AS "Reads",
   (SELECT sum(blks_hit) FROM pg_stat_database) AS "Hits";
   
   SELECT
   (SELECT count(*) FROM pg_stat_activity) AS "Total",
   (SELECT count(*) FROM pg_stat_activity WHERE state = 'active')  AS "Active",
   (SELECT count(*) FROM pg_stat_activity WHERE state = 'idle')  AS "Idle";
   
   
-- PostgreSQL 统计信息混淆之处(scan,read,fetch,hit)源码解读
https://www.baidu.com/link?url=hXUK_8OLg0EmXf33XjJGTZX8oM3yL3ZX8bFGH17T8zPsR3mYgHBR3IaDSsXHIABLCVBfUsFFyaIGP2GBIXX-Uq&wd=&eqid=e46e187c00059a9c000000045b46ea10