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Hans-Jürgen Schönig

Founder & CEO of CYBERTEC
Hans-Jürgen Schönig has worked with PostgreSQL since the 90's. He is the CEO and technical lead of CYBERTEC PostgreSQL International, a market leader in the field. He's served countless customers around the globe since the year 2000. He is also the author of the well-received "Mastering PostgreSQL" book series, as well as several other books about PostgreSQL replication and administration.

Articles by Hans-Jürgen Schönig

PostgreSQL: You might need to increase max_locks_per_transaction

by Hans-Jürgen Schönig | 01.2020
“out of shared memory”: Some of you might have seen that error message in PostgreSQL already. But what does it […]

Setting PostgreSQL configuration parameters

by Hans-Jürgen Schönig | 12.2019
A lot has been written about configuring postgresql.conf, postgresql.auto.conf and so on. However, sometimes it requires to take a second […]

Abusing PostgreSQL as an SQL beautifier

by Hans-Jürgen Schönig | 12.2019
SQL is query a language that is usually pretty easy to read. However, if people don't format their queries properly […]

effective_cache_size: What it means in PostgreSQL

by Hans-Jürgen Schönig | 11.2019
Many PostgreSQL database users might have stumbled over the effective_cache_size parameter in postgresql.conf. But how can it be used to […]

Prewarming PostgreSQL I/O caches

by Hans-Jürgen Schönig | 10.2019
PostgreSQL uses shared_buffers to cache blocks in memory. The idea is to reducedisk I/O and to speed up the database […]

What is autovacuum doing to my temporary tables?

by Hans-Jürgen Schönig | 10.2019
Did you know that your temporary tables are not cleaned up by autovacuum? Autovacuum cleans tables automatically Since the days […]

How PostgreSQL estimates parallel queries

by Hans-Jürgen Schönig | 10.2019
Parallel queries were introduced back in PostgreSQL 9.6, and the feature has been extended ever since. In PostgreSQL 11 and […]

Fixing track_activity_query_size in postgresql.conf

by Hans-Jürgen Schönig | 10.2019
Many of you might have wondered why some system views and monitoring statistics in PostgreSQL can contain incomplete query strings. […]

Using “Row Level Security” to make large companies more secure

by Hans-Jürgen Schönig | 09.2019
Large companies and professional business have to make sure that data is kept secure. It is necessary to defend against […]

PostgreSQL Row Level Security, views and a lot of magic

by Hans-Jürgen Schönig | 08.2019
Row Level Security (RLS) is one of the key features in PostgreSQL. It can be used to dramatically improve security […]
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