Tanel Poder @tanelpoder.com · May 28 New blog: Using Postgres pg_test_fsync tool for testing low latency writes An easy to use tool that comes with standard Postgres installation, for testing write latency of devices where you put your WAL/redo logs and any other files requiring low write latency. (link in reply)
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Thank you for the blog. But are you sure about write through vs write back? In my experience (and I just checked with Google) write back mode is the one where disk acknowledges the write once data is in the cache. And write through is slower because data has to be written to the actual disk.
Link to post here: tanelpoder.com/posts/using-...