Performance Tuning for Content Manager

154 Performance Tuning for Content Manager

Our recommendation

Verify all operating system issues before starting the installation process. Plan

ahead. Make sure that the use of EJFs or JFS2 is needed in your business

environment before proceeding.

7.2.3 Check the default values in ulimit

The ulimit command sets and reports user process resource limits, as defined

in the /etc/security/limits file. This file contains these default limits:

fsize = 2097151

core = 2097151

cpu = -1

data = 262144

rss = 65536

stack = 65536

nofiles = 2000

During installation, DB2 creates an entry in the limits file and changes the

defaults for the instance owner (user db2inst1) with the following values:

db2inst1:

fsize = -1

core = -1

data = 491519

rss = -1

stack = 32767

nofiles = 2000

How to view or set

To view the actual values, you can either edit the file (/etc/security/limits) or

use the ulimit -a command.

To change the values for the number of files and the size of the files, you can

either edit the file or use commands such as:

ulimit -n 2000

ulimt -f -1

For large SMP machines with clones, issue the ulimit -unlimited command:

Our recommendation

Be sure that all values for the db2inst1 user are in the limits file. If not, we

recommend you to add it.