Enable pg_stat_statements in database template1 to collect statistics on all queries

Step 1: Enabling pg_stat_statements. The query information collected by the extension is cleaned and then sent to our servers using our collector script. The pg_stat_statements module provides a means for tracking execution statistics of all SQL statements executed by a server. The module must be loaded by adding pg_stat_statements to shared_ preload _libraries in postgresql.

This means that a server restart is needed to add or remove the module. Setting pg_stat_statements. The grows should be linear. It does not say so in documentation, but logically should be so.

The pg_stat _all_ indexes view will contain one row for each index in the current database , showing statistics about accesses to that specific index. The pg_stat_user_indexes and pg_stat_sys _indexes views contain the same information, but filtered to only show user and system indexes respectively. In the previous post, I have shared basic steps to configure and enable pg_ stat _statements module for tracking query statistics.

In this post, I have prepared one small DBA script to find query statistics such a way that we can easily see the long executed queries. PostgreSQL instance, it will use ssh to collect OS informations. When using postgresqltuner. During the activity of Performance Optimization, We are always keen for long running queries of our Database Server. You should configure ssh to connect to the remote host with private key authentication.

The extension will deploy a view called pg_stat_statements and make the data easily accessible. Upon a crash, all this data is discarded. So let’s check if this extension is in your database installation.

Configure postgresql. Before starting the installation, we need to make some configurations in postgresql. To collect statistics , we need to modify the following parameters via postgresql.

Check pg _statistic system catalog, or rather pg _stats which is a view on top of pg _statistic making the stats easier to read for humans. A lot of things can go wrong with the stats, mostly resulting in choice of a bad plan and bad query performance. You can dig deeper into each statistics view’s actual query language by looking at the system views source code. Reboot your database.

To enable the extension you need to reboot your database. Verify that pg _ stat _ statements is enabled. Connect to your database as an RDS superuser (usually the credentials you created the database with), e. Check Show all Columns (Right Side Down) Select DatabaseName, click the plus next to Like in the right-hand pane, and type your database name. I always save the trace to a table too so I can do LIKE queries on the trace data after the fact.

We take a look at using an extension called pg _ stat _ statements. For this, we should enable pg_stat_statements extension. The following shows the steps on a Fedora Linux systeInstall the postgresql-contrib package.

The below display currently running queries , and a granted column indicate whether the query has actually started running (or still waiting to acquire locks). All this information should help you to limit the search to most time-consuming queries and then identify the root cause. These result tables are called result-sets.