Setting System Limits for Linux - trillium_discovery - trillium_quality - 17.1

After installation we recommend that you manually set the following system limits to the Linux server. Otherwise the application may exceed max open file limits and you will see an error “Too many open files”.

• System-wide limit

• Per-user descriptors limit

• Xinetd service limit

To set system-wide limit

1. Use the following command to verify that the system-wide limit for ‘Max open files’ (descriptors) is set to unlimited (or greater than or equal to 10,000,000):

   cat /proc/sys/fs/file-max

   

2. If the limit is not set to unlimited (or greater than or equal to 10,000,000), use the following steps to increase the total number of files that can remain open system-wide:

   1. Open the file /etc/sysctl.conf.

   2. Add fs.file-max=10000000.

   3. Run sysctl -p.

To set per-user descriptors limit

1. Run the following command to verify that the per-user descriptors limit is at least 1,000,000:

   limit or ulimit -a (if limit is not available)

   

2. If the limit is not set to at least 1,000,000, increase the soft and hard values for this limit.

   1. Open the file /etc/security/limits.conf.

   2. Add desired values for all or a specific user.

      user      hard      nofile    1000000
      user      soft      nofile    1000000

To set xinetd service limit

1. Use the following steps to verify that ‘Max open files’ limit for the xinetd service is set to 1,000,000:

   1. Run ps -ef | grep xinetd to get the PIDs.

   2. Run cat /proc/PID/limits.

      

      If the limit is not set to 1,000,000, use the following steps to increase it:

   3. Stop xinetd service by running systemctl stop xinetd.

   4. Open /usr/lib/systemd/system/xinetd.service.

   5. Add LimitNOFILE=1000000 at the end of the [Service] paragraph.

   6. Start the service by running systemctl start xinetd.