tldr/pages/common/pg_test_fsync.md

pg_test_fsync

Determine the fastest wal_sync_method on your system. More information: https://www.postgresql.org/docs/current/pgtestfsync.html.

• Run the default fsync benchmark (5 seconds):

pg_test_fsync

• Specify a custom test duration:

pg_test_fsync {{[-s|--secs-per-test]}} {{seconds}}

• Use a specific filename (it must be in same file system that the pg_wal directory is or will be placed in):

pg_test_fsync {{[-f|--filename]}} {{path/to/file}}