Select * from pg_stat_activity where state ='active' Select * from pg_stat_activity where state !='idle' Suppose we need to show all non-idle connections or queries on the server at that time we use the following statement as follows. query: The query column is used to show all executed queries.state: The state column is used to show the current state of the transaction that means active or idle.query_start: The query_start shows the time of when query execution is started.backend_start: The backend _start column is used to show the time of the process that started which means it shows when the client is connected.xact_start: The xact_start means start time transaction when we do not need start time of query to kill query.The port number means which type of protocol we use to establish the connection. ![]() client_port: The client _port column shows all clients’ port number that is available on postgre server.client_addr: The client _addr means client address and client address shown on the server by using client IP address with the help of IP address we can make connections between client and server.username: The username means user name on postgre server.pid: The pid means process id on the Postgres server as shown in the above snapshot.datname: The datname means database name such as Postgres and shape as shown above snapshot.Let’s see what is the meaning of the above column name as follows. Illustrate the final result of the above statement by using the following snapshot. In the above statement, we use a select clause with pg_stat_activity command, when we run this statement it shows some details as shown in the snapshot. Example #1įirst, we need to see all running processes in the PostgreSQL server at that time we use the following statement as follows. Let us discuss examples of the PostgreSQL kill query. After getting the process id we can use any one of the syntaxes to kill the query as shown in the above syntax. In the above statement, we use pg_stat_activity to see all running processes on the Postgres server as well as it also shows all database connections to correspond to the Postgres server.Īfter that, kill specific query by using process is, so how we can get the process id answer of this question is that when we run pg_stat_activity statement it shows all details with respect to the query. First, we need to identify the all running query by using the following statement as follows. ![]() Kill query in PostgreSQL works in different stages. The main difference between pg_cancle_backend and pg_cancle_terminate is that in the first syntax we just kill the query but in the second syntax we kill the query as well as connect with the help of process id we can also call as hard way to kill. In the above syntax, we use the terminate command to kill the query. When we need to kill a query at that time we require process id to kill the query or session so in the above syntax we use process id with command. In the above syntax, we use the select clause with pg_cancle_backend command. Hadoop, Data Science, Statistics & others
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