Using Postgres pg_test_fsync tool for testing low latency writes

Here&rsquo;s a useful tool for quickly testing whether a disk (or a cloud block store volume) is a good candidate for your database WAL/redo logs and any other files that require low latency writes. The pg_test_fsync tool is bundled with standard Postgres packages, so no extra installation is needed. You don&rsquo;t actually have to use Postgres as your database, this tool&rsquo;s output is…