Indexing "LIKE" in PostgreSQL and Oracle
by
Laurenz Albe |
08.2023© Laurenz Albe 2023 Unless you use the binary collation, creating a b-tree index to support a LIKE condition in […]
"Why does my pg_wal keep growing?" That's a question I keep hearing again and again. It is an urgent […]
Bulk load performance in PostgreSQL
by
Laurenz Albe |
08.2023 There are several techniques to bulk load data into PostgreSQL. I decided to compare their performance in a simple […]
Subqueries and performance in PostgreSQL
by
Laurenz Albe |
07.2023 SQL allows you to use subqueries almost anywhere where you could have a table or column name. All you […]
Memory context: private memory management in PostgreSQL
by
Laurenz Albe |
06.2023 (updated 2025-01-27) PostgreSQL uses shared memory for data shared between processes. With the exception of the dynamic shared memory […]
Use HOT, so CLUSTER won't rot in PostgreSQL
by
Laurenz Albe |
06.2023CLUSTER is sometimes the last resort to squeeze performance out of an index scan. Normally, you have to repeat CLUSTER […]
ERROR: invalid byte sequence - Fix bad encoding in PostgreSQL
by
Laurenz Albe |
05.2023(Inscription seen on a T-shirt) It's annoying to get error messages caused by encoding problems. But it is more annoying […]
PostgreSQL ALTER DEFAULT PRIVILEGES - permissions explained
by
Laurenz Albe |
05.2023 Many people have heard that ALTER DEFAULT PRIVILEGES makes it easy to allow other users access to tables. But […]
Different from many other database systems, PostgreSQL does not support query hints. That makes it difficult to force the […]
Docker and sudden death for PostgreSQL
by
Laurenz Albe |
05.2023 This is a short war story from a customer problem. It serves as a warning that there are special […]
