Get filename with High I/O read request

Question

My Jenkins server is giving high read I/O of 5-10MB and there are no jenkins job is running on it.

I was able to find the process(jenkins) with command iotop -oP

and with lsof -p 20874 i'm getting more than 2500 files which is very hard to debug.

is there any way where i can get the filename which is getting high read I/O request?

Answer 1

strace -p 20874

will show you all file operations made by that process. You can abort strace with ctrl-c. Some file is probably accessed alot and strace will show the file id of that file. Then simply

ls -al /proc/20874/fd

to see what file that file id points to.

Answer 2

1. Created clone of Jenkins VM

2. Power on the clone VM and started removing plugin one by one

3. After removing Prometheus metrics plugin - 2.0.6 the Read I/O is stable now