To improve Talend server modules and Unix system performance, you can configure the system resources (ulimit) according to the needs of the user or group. These settings are defined in the /etc/security/limits file.
ulimit syntax
ulimit <limit type> <item> <value>
There are two ulimit types: hard and soft.
- The soft limit is the effective resource limit. The user can increase the soft limit up to the value of the hard limit.
- The hard limit is the maximum resource limit. This value is set by the superuser and cannot be exceeded.
Note: If you do not specify a limit type, the hard limit type is used by
default.
The following ulimit settings are important for your Talend deployment.
| Item | Description | Flag | Value |
|---|---|---|---|
| fsize | Maximum file size | -f | KB |
| nofile | Maximum number of open files | -n | - |
| stack | Maximum stack size | -s | KB |
| cpu | Maximum CPU time | -t | minutes |
| nproc | Maximum number of processes/threads | -u | - |
Note: You can list all available ulimit settings with the following
command:
ulimit -a
Example
ulimit -H -n 2000
This command sets a hard limit of 2000 open files per process.
For complete details on the ulimit settings, see the SS64 reference guide for ulimit.