pg_stat_activity是PostgreSQL原生工具,官方说明如下:The pg_stat_activity view will have one row per server process, showing information related to the current activity of that process(该pg_stat_activity视图将为每个服务器进程显示一行,显示与该进程的当前活动相关的信息)。pg_stat_activity作为查询监控的视...
PostgreSQL pg_stat_activity state client_addrinetIP address of the client connected to this backend. If this field is null, itindicates(表明) either that the client is connected via a Unixsocket(插座) on the server machine or that this is aninternal(内部的) process such as autovacuum. 1、...
PG_STAT_ACTIVITY视图显示和当前用户查询相关的信息。若有管理员权限或预置角色权限可以显示和所有用户查询相关的信息。
FROM pg_stat_get_activity(NULL) AS S JOIN pg_stat_get_wal_senders() AS W ON (S.pid = W.pid) LEFT JOIN pg_authid AS U ON (S.usesysid = U.oid); sent_lsn,write_lsn等指标来自pg_stat_get_wal_senders函数 Datum pg_stat_get_wal_senders(PG_FUNCTION_ARGS) { #define PG_STAT_GET_...
pg_stat_activity 是 PostgreSQL 内置的一个系统视图, 是 PostgreSQL 实例维护的一个进程相关的视图,是实时变化的。 官方对他的定义是:每一行都表示一个系统进程,显示与当前会话的活动进程的一些信息,比如当前回话的状态和查询等。 主要字段 主要作用 平时遇到数据库,查询慢,或者数据库故障问题,可以看看数据库相关的...
普通用户只能查看到自己账户所对应的会话状态。即其他账户的state信息为空。例如以judy用户连接数据库后,在pg_stat_activity中查看到的普通用户joe及初始用户omm的state信息为空: SELECT datname, usename, usesysid, state,pid FROM pg_stat_activity;
dws的pg_stat_activity是通过函数获取的系统信息,在每个版本会有些许变化,但内部逻辑基本一致,可以在gsql下执行如下命令获取\d+ pg...
state_change,wait_event_type,wait_event, state, backend_xid, backend_xmin, queryfrompg_stat_activity a0where1=1anda0.state<>'idle'and(a0.backend_xidisnotnullora0.backend_xminisnotnull)orderbynow()-xact_start; now() - xact_start 是指事务截至当前已运行时间。
state, S.backend_xid, s.backend_xmin, S.query_id, S.query, S.backend_type FROM pg_stat_get_activity(NULL) AS S LEFT JOIN pg_database AS D ON (S.datid = D.oid) LEFT JOIN pg_authid AS U ON (S.usesysid = U.oid); 从视图定义中可以看出,视图中的主要信息来自 pg_stat_get_...
Notice the short interval between state_change and log_time. The clients all happen to just change state when querying pg_stat_activity. Could there be a race condition between executing pg_stat_get_activity(null) and the server cleaning up closed connections? Closed connections still appear but...