You need some descriptors for running processes, etc, not only for datafiles. From: sandra-paganini via oracle-db-l [mailto:oracle-db-l Groups. The Linux has a number of limits on the maximum number of open files. During the installation of Oracle RAC the installation guide recommends a number of kernel parameters to be set these include an entry for the maximum of open files allowed system wide on the server. The installation guide does also recommend that the parameters are tuned to the system upon which they are being installed but can be considered as a minimum value for an installation.
The setting of this parameter limits all open file handles, in this case, to file handles open maximum. No Account? Sign up. By signing in, you agree to our Terms of Use and Privacy Policy. Already have an account? Sign in. By signing up, you agree to our Terms of Use and Privacy Policy.
Enter the email address associated with your account. We'll send a magic link to your inbox. Email Address. All Sign in options. For example on a CentOS server of mine, the limit was set to , while on Ubuntu server that I run at home the default limit was set to If you are running a server, some of your applications may require higher limits for opened file descriptors.
You can increase the limit of opened files in Linux by editing the kernel directive fs. For that purpose, you can use the sysctl utility. Sysctl is used to configure kernel parameters at runtime. For example, to increase open file limit to , you can use the following command as root:. With the above command the changes you have made will only remain active until the next reboot. If you wish to apply them permanently, you will have to edit the following file:.
Users will need to logout and login again for the changes to take effect. If you want to apply the limit immediately, you can use the following command:. The above examples, showed how to set global limits, but you may want to apply limits per user basis. For that purpose, as user root, you will need to edit the following file:. If you are a Linux administrator, I suggest you that you become very familiar with that file and what you can do to it.
This brief article showed you a basic example of how you can check and configure global and user level limits for maximum number of opened files. They will be of great help for you one day. TecMint is the fastest growing and most trusted community site for any kind of Linux Articles, Guides and Books on the web. Improve this answer. Ondra K. Alexios Alexios On Linux 4. Webman : no, it doesn't. The limits of the current process are bequeathed to children processes too, but each process has a separate count.
Each child process you create can only have up to 10 file descriptors too. Only the superuser may increase a limit once set. If you set one too low, your only option may be to kill your shell process and start a new one. Lothar Lothar 97 4 4 bronze badges. And the best would have been a suggestion of a replacement call like poll 3 , as in this answer — Davor Cubranic.
Sorry DavorCubranic. This, signals handling, process id integers and the inability to provide stable identification value inode for files because atomic file path rename instead of atomic file content switching makes me so angry when talking with Linux fanboys. Hint: all of them are solved in Darwin, so we can all blame it on one single person: Linus Torvalds — Lothar. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name.
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