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How to check the size of a PostgreSQL database?
Checking the disk space used by the PostgreSQL node per database can help us to confirm if we need more disk or even a table partitioning. To check the disk space used by a database/table we can use some PostgreSQL function like pg_database_size or pg_table_size. These could be clear metrics to confirm if the scaling of our database is needed.
How to set parameter values in PostgreSQL server?
Both the server and libpq client library accept parameter values via the shell. During server startup, parameter settings can be passed to the postgres command via the -c command-line parameter. For example,
How does vertical scaling work in PostgreSQL database?
Vertical Scaling (scale-up): It’s performed by adding more hardware resources (CPU, Memory, Disk) to an existing database node. For Horizontal Scaling, we can add more database nodes as slave nodes. It can help us to improve the read performance balancing the traffic between the nodes.
Which is the corresponding function in PostgreSQL set?
The corresponding function is current_setting (setting_name text). The SET command allows modification of the current value of those parameters that can be set locally to a session; it has no effect on other sessions. The corresponding function is set_config (setting_name, new_value, is_local).
How can i Improve my query in PostgreSQL?
You could improve queries by better managing the table indexes. Indexes help to identify the disk location of rows that match a filter. If there is no index, Postgres will have to do a sequential scan of the whole table. The more rows there are, the more time it will take. If you add an index, the query will be faster.
When to remove indexes in PostgreSQL to improve performance?
Sometimes indexes are not used because there are not enough rows in the table. So if the table is new, you should wait a few weeks before removing them. It’s always possible to do better, and spend more time to improve performance.
Which is the best way to improve Postgres performance?
For example, for a large indexed table, the first query is much more slower than the second one. The first query is slower and has more data to load at the begin of the plan. So always prefer using NOT EXITS which is better optimized. You could improve queries by better managing the table indexes.
Why are there so many demands on PostgreSQL?
The reasons for this amount of demands could be temporal, for example, if we’re launching a discount on a sale, or permanent, for an increase of customers or employees. In any case, we should be able to add or remove resources to manage these changes on the demands or increase in traffic.
Is there a way to import PostgreSQL database?
If you’re not using ClusterControl yet, you can install it and deploy or import your current PostgreSQL database selecting the “Import” option and follow the steps, to take advantage of all the ClusterControl features like backups, automatic failover, alerts, monitoring, and more.