Re: fdatasync performance problem with large number of DB files

On 2021-02-22 5:43 p.m., Tom Lane wrote: > Michael Brown writes: >> * is there a knob missing we can configure? > > No. The trouble with sync() is that per POSIX, it only schedules the > writes; there's no way to tell when the work has been done. I see > that Linux o

fdatasync performance problem with large number of DB files

ackup.c#L2181 [3]: https://github.com/postgres/postgres/blob/master/src/backend/access/transam/xlog.c#L6495 [4]: It should be identical config-wise. It isn't starved for IO but does have other regular write workloads -- Michael Brown Civilized Discourse Construction Kit, Inc. https://www.discourse.org/