Connector Guides › Connectors Guide › Configuring CA IAM CS › Customize the Configuration for CA IAM CS › Configure CA IAM CS to Work Under Heavy Loads (UNIX Only)

Configure CA IAM CS to Work Under Heavy Loads (UNIX Only)

We recommend that you consider carefully the ulimit -n setting for the user for which you install CA IAM CS. The default setting is too low to allow CA IAM CS to function properly under load.

When this problem occurs the Java virtual machine shuts down and the following message appears in the jcs_daily log:

exiting because of 120 exceptions in a row: Too many open files

CA IAM CS requires a minimum ulimit -n setting of around 80.

Follow these steps:

1. Find out the value of maxThreads.

   The default value is stored in the following file:

   cs_home/jcs/conf/server_osgi_ad.xml
   

   If a custom value has been specified, it is stored in the following file:

   cs_home/jcs/conf/override/server_ad.properties
   

2. Calculate the best ulimit value, using the maxThreads value:
   • ulimit = 50 + 2 x maxThreads
3. Set the ulimit value.