Database Administration & Monitoring

PostgreSQL 19: Dynamically adjust the I/O worker pool

When PostgreSQL 18 was released last year one of the major features was the introduction of the asynchronous I/O subsystem. The main configuration parameter for this was (and still is)(…)

PostgreSQL 19: pg_waldump can now read from archives

When PostgreSQL 18 introduced the ability to verify tar based (and compressed) backups with pg_verifybackup there was one limitation: The verification of the WAL files in the tars (or compressed files)(…)

PostgreSQL 19: Importing statistics from remote servers

Usually we do not see many foreign data wrappers being used by our customers. Most of them use the foreign data wrapper for Oracle to fetch data from Oracle systems. Some of them use the(…)

PostgreSQL 19: Online enabling of data checksums

Since PostgreSQL 18 was released last year checksums are enabled by default when a new cluster is initialized. This also means, that you either need to explicitly disable that when you upgrade from a previous version of PostgreSQL or(…)

PostgreSQL 19: get_*_ddl functions

PostgreSQL already comes with plenty of system information functions to reconstruct the commands to create various objects, e.g. constraints or indexes. Starting with PostgreSQL 19 more functions will be available, namely those: pg_get_database_ddl pg_get_role_ddl pg_get_tablespace_ddl(…)

PostgreSQL 19: json format for “copy to”

PostgreSQL already has impressive support for working with data in json format. If you look at the jsonb data type and all the built-in functions and operators you can use, there is so(…)

PostgreSQL 19: The “repack” command

Before PostgreSQL 19 you had two commands to completely rewrite a table: Either you can use the “vacuum full” or the “cluster” command to achieve this. Both operations are blocking and(…)

Remove grant to public in Oracle databases

CIS recommendations The Center for Internet Security publishes the “CIS Oracle database 19c Benchmark” with recommendations to enhance the security of Oracle databases. One type of recommendations is to remove grant execute to public (chapter 5.1.1.1-5.1.1.7 Public(…)

PostgreSQL 19: pg_plan_advice

In our performance tuning workshop, especially when attendees have an Oracle background, one question for sure pops up every time: How can I use optimizer hints in PostgreSQL. Up until today there are three answers(…)

Commercial PostgreSQL distributions with TDE (3) Cybertec PostgreSQL EE (1) Setup

In the lasts posts in this series we’ve looked at Fujitsu’s distribution of PostgreSQL (here and here) and EnterpriseDB’s distribution of PostgreSQL (here and(…)