fsync slowness + XFS -- Regd.

[Valdis Kl=?utf-8?Q?=c4=93?=tnieks]

On Tue, 19 Mar 2019 07:40:29 +0530, Jeno P said:

> One of my module *(C/C++)* is writing to log files and periodically flushes
> it using *fsync()*. Even for small amount of data, *fsync* is taking more
> time *(>15 seconds)* than expected.

Is it possible that some other process is applying a file lock to the log file?
Any signs of I/O errors? 15 seconds is the sort of delay you might see on a
RAID controller with one dead or partially dead disk throwing timeouts...