Carlos Llamas wrote: > I made a PHP script which locks a specific file in a NFS directory, measuring > every step involved. Then exported the results to CSV and graphed it on ELK > because I am more familiar with it.
Thanks for the additional details. It sounds like you have a reproducible test case, which will help a lot for tracking down the problem. The bar chart that you included just shows the total time. Do your results show that some operations (e.g., lock/unlock) are particularly slow on the web05 (green) system? Or is it more that all the operations are slower when compared to the web04 (blue) system? I see that Debian includes sosreport, which I *think* reports log messages (among other things). I'd try to get log messages from both web05 and the NFS server, and look for warning messages that might be relevant. mike
