Infrastructure at your Service
When it comes to designing a PostgreSQL architecture that fits your requirements there are a couple of things to think about: Do you need a HA setup? How shall backups and restores being done and how shall all of these components get monitored? Do you need vendor support for all the tools that make up the architecture? At dbi we have a reference architecture that we can apply to most of our projects. It is…
Back in 2012 I wrote a small blog post about watching the results of commands in Linux. Well, the same can be done in psql: ([email protected][local]:4448) [postgres] > create table t1 ( a int ); CREATE TABLE ([email protected][local]:4448) [postgres] > insert into t1 values ( generate_series ( 1, 10)); INSERT 0 10 ([email protected][local]:4448) [postgres] > select count(*) from t1; count ——- 10 (1 row) ([email protected][local]:4448) [postgres] > \watch Watch every 2s Mon Dec 21 07:34:35…
The last posts introduced the logging system, pg_stat_statements, pg_activity and pgcluu. This post will look at POWA: PostgreSQL Workload Analyzer. For getting the most out of POWA the following extension should be installed in the PostgreSQL instance you want to monitor: pg_stat_statements (see last post) pg_stat_kcache: gathers statistics about reads and writes done by the file system layer pg_qualstats: gathers statistics of predicates found in where statements and join clauses btree_gist: provides GiST index operator…
The last posts introduced the logging system, pg_stat_statements and pg_activity. All of these can be used to monitor sql statements the PostgreSQL server is executing. In this post I’ll look into pgcluu: PostgreSQL Cluster utilization! This is a more complete monitoring solution as it is not only focused on sql statements but gives you information about the database cluster itself and other useful stuff. All you need to run pgcluu is a modern perl distribution…
The last posts looked at how the logging system and the pg_stat_statements extension can be used to monitor sql statements in PostgreSQL. This post will introduce pg_activity which is very similar to htop. There are some dependencies which need to be installed before we can start installing pg_activity. The first one is python. As I am on a redhat based distribution this is quite easy: [[email protected] ~] yum install -y python Then we need to…
The last post looked into how you can monitor queries using the logging system. This post will introduce pg_stat_statements. pg_stat_statements is a module that needs to be loaded and is not available in the default configuration. Loading it is quite easy. Create the extension as usual: [email protected]:/home/postgres/ [PG6] sqh Null display is “NULL”. Timing is on. psql (9.5alpha2) Type “help” for help. ([email protected][local]:4448) [postgres] > create extension pg_stat_statements; CREATE EXTENSION Time: 281.765 ms ([email protected][local]:4448) [postgres]…
When developing an application as well as when the application is in production there is the need to identify long running queries. In Oracle one tool you might use for that is the SQL Monitor. In this post I’ll look into what PostgreSQL provides in this area. PostgreSQL has a very strong logging system. This system can be used to log many, many server messages as well as information about sql queries. To enable to…
Oracle EM Cloud Control 12c (CC12c) – Repeat alert notification In your EM installation, CC12c will notify your different administrators when specific incidents, events, or problems occurs. But from standard configuration, you will receive only one warning or critical notification/alert … until the Clear or an Acknowledge of the alert. Some times and for different reasons (human error, email was deleted, Mail server issues, …) you can lost or forgot this alert. Hummm this is…
Lot’s of companies do not use Grid- or Cloud Control for monitoring their Oracle databases for various reasons but rather use open source tools like nagios. And lot of those either implemented custom script frameworks or rely on plug-ins available for the monitoring solution of choice. This post shall show on how you can let Oracle check a lot of its own metrics and you only need one script for alerting various metrics. Oracle provides…
We saw in my last blog how to install the SQL Server plugin for Nagios. In this new blog, I will explain: how to create a wrapper to avoid the unset of the PERLLIB variable how to create and configure a configuration file by monitoring instance how to create an SQL Login for nagios How to subscribe to an alert As we saw in the first nagios blog, to be able to run the check…
