How do you pass the initdb argument for data checksums to pg_createcluster when creating the initial cluster?

Passing the argument as per initdb fails for me:

pg_createcluster --data-checksums --datadir=foo/cluster_name 9.5 cluster_name

2 Answers 2


After further investigation, to specify the default initdb arguments used in pg_createcluster, the below was added in /etc/postgresql-common/createcluster.conf:

initdb_options = '--data-checksums'

Then pg_createcluster was run as normal and show data_checksums displays:

(1 row)

According the pg_createcluster usage message, initdb arguments have to go after a double dash.

pg_createcluster --datadir=foo/cluster_name 9.3 cluster_name -- --data-checksums
  • Using this syntax gives: "Warning: cluster names containing dashes (-) will cause problems when running from systemd. Continuing anyway", creating the cluster, without the data-checksums parameter set May 21, 2016 at 23:36
  • 1
    JFI @user2277435: "pg_createcluster 10 my_cluster -- --data-checksums" works as expected
    – alfonx
    Oct 1, 2018 at 21:52

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