Another possibility could be that the disk is in sleep mode and it needs to wake up (A feature enabled on most green drives)
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...
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