Setting the ulimit values on UNIX and Linux operating systems
Setting the appropriate ulimit values on your UNIX or Linux operating system can affect how IBM® Cognos® PowerPlay® performs.
On UNIX operating systems, issues can arise if the stack ulimit settings are too low.
Using the correct stack ulimit settings can prevent these problems.
The recommended ulimit settings for a new installation are as follows:
- IBM AIX®
- CPU time (seconds): ulimit -t unlimited
- File size (blocks): ulimit -f unlimited
- Maximum memory size (kbytes): ulimit -m unlimited
- Maximum user processes: ulimit -u unlimited
- Open files: ulimit -n 8192 (minimum value)
- Stack size (kbytes): ulimit -s 8192 (minimum value)
- Virtual memory (kbytes): ulimit -v unlimited
- Oracle Solaris
- CPU time (seconds): ulimit -t unlimited
- File size (blocks): ulimit -f unlimited
- Maximum user processes: ulimit -u unlimited
- Memory (kbytes): ulimit -m unlimited
- Open files: ulimit -n 8192 (minimum value)
- Stack size (kbytes): ulimit -s 8192 (minimum value)
- Linux® (x and IBM POWER System - Big Endian)
- CPU time (seconds): ulimit -t unlimited
- File size (blocks): ulimit -f unlimited
- Maximum memory size (kbytes): ulimit -m unlimited
- Maximum user processes: ulimit -u unlimited
- Open files: ulimit -n 8192 (minimum value)
- Stack size (kbytes): ulimit -s unlimited
- Virtual memory (kbytes): ulimit -v unlimited
Note: These settings may need to be adjusted for your environment
during the lifecycle of the application.