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How can I check the number of open files on a linux system? (Doc ID 2508177.1)

Last updated on MAY 05, 2020

Applies to:

Linux OS - Version Oracle Linux 4.4 and later
Oracle Cloud Infrastructure - Version N/A and later
Information in this document applies to any platform.


 There are situations, such as when a server are experiencing performance issues, where knowing how many open files are in use across the whole system is helpful.  If the number of open files is high, it could indicate issues such as an unusual workload on the server causing problems, or an application not correctly closing open files once it no longer needs them. This document describes how to check the total number of open files associated with processes on the system using the lsof command.


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