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KB-0291: Recommended settings in centrifydc.conf for high load CPU servers

Authentication Service ,  

12 April,16 at 11:11 AM

Question:

What are the recommended settings in /etc/centrifydc/centrifydc.conf for high load servers?


Answer:

Here are some recommendations for high load server configuration where the system is creating 100+ requests per second.

adclient.clients.listen.backlog:
This configuration parameter specifies the number of clients which can wait to be serviced.

The parameter value must be an integer zero or greater. For example:
adclient.clients.listen.backlog: 50

If this parameter is not defined in the configuration file, its default value is 50 threads.

For high load servers please use values in the range 200-1000 (This setting may be dependent on OS limits)

adclient.clients.threads:
This configuration parameter specifies the number of threads the Centrify DirectControl daemon pre-allocates for processing client requests.

The parameter value must be an integer zero or greater. If you set this parameter to zero, the Centrify DirectControl daemon processes requests sequentially. For example: adclient.clients.threads: 4

If this parameter is not defined in the configuration file, its default value is 4 threads.

For high load servers please use values in the range 50-200.

adclient.clients.threads.max:
This configuration parameter specifies the maximum number of threads the Centrify DirectControl Agent will allocate for processing client requests.

This parameter value should be greater than or equal to the number of pre-allocated threads specified by the adclient.clients.threads parameter.  The default value is 20 threads.  For example:
adclient.clients.threads.max: 20

For high load servers please use values in the range 250-1250

adclient.use.all.cpus:
This configuration parameter specifies whether to use all the CPU's on the system or not.
The parameter value is set to true to use all the CPU's on the system or it can be set to false otherwise.
For example: adclient.use.all.cpus: false

As of the 4.3.0 agent version, the default value for this parameter is true.

For high servers which are multi processor, set this parameter to true

Since threads are allocated at agent starts up, If you modify any of the above parameters you must restart Centrify agent ;

To restart Centrify agent, adclient
# /usr/share/centrifydc/bin/centrifydc restart

Config Guide for Reference :
https://docs.centrify.com/en/css/2017.2/centrify-unix-config-guide.pdf

 

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