Performance impact of setting High db file size for CA directory

[Saif Jiwani]

Hi All,

We are planning to increase the Db file size of CA directory to 8 Gb according to the CA article(https://docops.ca.com/cad141/installing/recommendations#Recommendations-RAMRequirement).
We wanted to know if increasing the Db file size have any performance impact on the systems(i.e CA IDM & CA SSO).
Please let us know the solution or pointers on the same.

Thanks,
Saif

[Iyes Dendeni]

CA Directory is memory-based, and all data and indexes are persistently loaded in memory. In pure CA Directory best practices, the RAM for the server running CA Directory should equal 3 times the total size of all the LDIF files for each active DSA, *plus* the OS overhead and any memory requirements for other applications.

Now keep in mind that when you increase your data file to 8 Gb, not all 8 Gb gets loaded in memory, only the amount of data within that file. The more you add data the more the memory allocation grows. This means that if you continue to use the server without adding any memory, you will see performance degradation over time as your data grows. 

To be on the safe side, you need to increase your memory according to the formula above and account for the OS and the memory requirements of the other CA Identity Suite components.

--

Iyes Dendeni
Solutions Architect, Broadcom
Enterprise Software Division


Mobile: [phone]
[e-mail]

[Saif Jiwani]

HI Iyes,

We got the 8gb size using the formula. Will increasing the size from the default value to 8GB. will this change have an effect on the current performance?

Thanks,
Saif

[Iyes Dendeni]

Personally, I wouldn't run vApp on just 8 GB RAM.

Please consult the following page, it shows the memory requirements for each component in a production environment:

https://docops.ca.com/ca-identity-suite/14-3/EN/virtual-appliance/installing-virtual-appliance/vmware-deployment

Adding more memory is never going to degrade performance.

You just need to make sure you are using that memory. You do this by adjusting your java heap min and max values for each component of CA Identity Suite. Please see the section on Custom JVM Arguments in the following page:

https://docops.ca.com/ca-identity-suite/14-3/EN/virtual-appliance/administering-virtual-appliance#AdministeringVirtualAppliance-CustomJVMArguments

--

Iyes Dendeni
Solutions Architect, Broadcom
Enterprise Software Division


Mobile: [phone]
[e-mail]