Finding root cause of frequent filesystem sync in Linux [closed]

I am seeing a lot (4/second) of ext4_sync_file_enter in /sys/kernel/debug/tracing/trace and jbd2/sda2-8 IO percent is high.

How do I go about diagnosing the root cause?

cat /etc/issue  Ubuntu 20.04.1 LTS \n \l  uname -a Linux deans700 5.4.0-51-generic #56-Ubuntu SMP Mon Oct 5 14:28:49 UTC 2020 x86_64 x86_64 x86_64 GNU/Linuxcat /sys/kernel/debug/tracing/trace | grep ext4_sync_file_enter ThreadPoolForeg-5128  [000] ....  3585.478731: ext4_sync_file_enter: dev 8,2 ino 3539953 parent 3540086 datasync 1  ThreadPoolForeg-5128  [000] ....  3585.490916: ext4_sync_file_enter: dev 8,2 ino 3539953 parent 3540086 datasync 1  ThreadPoolForeg-5128  [003] ....  3585.979498: ext4_sync_file_enter: dev 8,2 ino 3539953 parent 3540086 datasync 1  ThreadPoolForeg-5128  [003] ....  3585.987067: ext4_sync_file_enter: dev 8,2 ino 3539953 parent 3540086 datasync 1  ThreadPoolForeg-5128  [006] ....  3586.480295: ext4_sync_file_enter: dev 8,2 ino 3539953 parent 3540086 datasync 1  ThreadPoolForeg-5128  [006] ....  3586.490623: ext4_sync_file_enter: dev 8,2 ino 3539953 parent 3540086 datasync 1  ThreadPoolForeg-5128  [004] ....  3586.981043: ext4_sync_file_enter: dev 8,2 ino 3539953 parent 3540086 datasync 1  ThreadPoolForeg-5128  [004] ....  3586.990292: ext4_sync_file_enter: dev 8,2 ino 3539953 parent 3540086 datasync 1  ThreadPoolForeg-5128  [004] ....  3587.481314: ext4_sync_file_enter: dev 8,2 ino 3539953 parent 3540086 datasync 1  ThreadPoolForeg-5128  [004] ....  3587.491525: ext4_sync_file_enter: dev 8,2 ino 3539953 parent 3540086 datasync 1  ThreadPoolForeg-5128  [002] ....  3587.982300: ext4_sync_file_enter: dev 8,2 ino 3539953 parent 3540086 datasync 1  ThreadPoolForeg-5128  [002] ....  3587.990960: ext4_sync_file_enter: dev 8,2 ino 3539953 parent 3540086 datasync 1  ThreadPoolForeg-5128  [007] ....  3588.482692: ext4_sync_file_enter: dev 8,2 ino 3539953 parent 3540086 datasync 1  ThreadPoolForeg-5128  [007] ....  3588.493217: ext4_sync_file_enter: dev 8,2 ino 3539953 parent 3540086 datasync 1  ThreadPoolForeg-5128  [004] ....  3588.983605: ext4_sync_file_enter: dev 8,2 ino 3539270 parent 3540086 datasync 1       LevelDBEnv-3749  [002] ....  3588.984640: ext4_sync_file_enter: dev 8,2 ino 3539487 parent 3540086 datasync 1  ThreadPoolForeg-5128  [004] ....  3588.993329: ext4_sync_file_enter: dev 8,2 ino 3539270 parent 3540086 datasync 1