write ahead logging – Postgresql 13 Change WAL segment size

On my Ubuntu 20 server, I installed PostgreSQL 13 using the apt manager. I read some articles on performance tuning of PostgreSQL (1) and thought of increasing the WAL segment size (from default of 16MB). I see the following instruction, however, I don’t know where to run this.

initdb -D ./data --wal-segment=1024

I guess the documentation refers to installing from PostgreSQL source code, which I don’t intend to do. How do I go about change the WAL segment size?

(1) https://software.intel.com/content/dam/develop/external/us/en/documents/Open-Source-Database-Tuning-Guide-on-3rd-Generation-Intel-Xeon-Scalable-Processors.pdf


Following Daniel’s answer, I did the following steps

pg_lsclusters
sudo pg_dropcluster --stop 13 main
sudo pg_createcluster 13 main -- --wal-segsize=256
sudo pg_ctlcluster 13 main start